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1

SITOR

Semiconductor Protection Fuses

Selection and Engineering Documents

Order No.: 3ZX1015-0NC00-1AB1

Edition 05/2003

Applicationsand Standards

Ordering andEngineering Data

Characteristicsand Dimension Drawings

Technical Descriptionand Terminology

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Applicationsand Standards

Features

Possible arrangements

Standards

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Applications Features

SITOR fuse links protect converters against short-circuit.

The power semiconductors used in these devices (diodes, thyristors, GTOs

and others) require fast-switching elements to protect them as a result of

their low thermal capacity. SITOR fuse links are admirably suited for this

type of application (fuse links for semiconductor protection with super-fast

characteristics).

The following fault situations involving short-circuits can occur:

• Internal short-circuit:A defective semiconductor compo-nent causes a short-circuit within the converter

• External short-circuit:A fault in the load causes a short-cir-cuit at the output of the converter

• Inverter commutation faults:If the converter control fails when in the inverter mode (commutation faults), then the converter circuit forms a short-circuit connection be-tween the DC voltage and AC voltage supply.

Fuse links can be arranged in various ways within the converter circuit. A dif-ferentiation is made between the phase fuses in the three-phase feeder cables as well as, if required, DC current fuses and branch fuses in the branches of the converter circuit (diagrams 5-1 to 5-6). For center-tap circuit configurations, fuse links can only be located in the three-phase feeder cables as phase fuses.

When using SITOR fuse links, utilization Category aR, the overload protection of the converters up to approx. 350% of the rated current is handled using conventional protective devices (e.g. thermally delayed overload relays). For closed-loop converters, overload protection is provided by the current limiting (exception: general-purpose fuses).

3NE1...-0 SITOR fuse links, utilization Category gS are, in addition to providing semiconductor protection, also de-signed for overload and short-circuit protection for cables, conductors and busbars. All of the other double func-tion fuses belonging to the SITOR series have gR characteristics. Overload pro-tection is guaranteed if the rated cur-rent of the 3NE1..-0 SITOR fuse link is selected corresponding to In ≤ Iz (DIN VDE 0100 Part 430).

The rules as laid-down in DIN VDE 0100 Part 430 must be applied when dimen-sioning the fuse links to provide short-circuit protection for cables, con-ductors and busbars.

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ApplicationsPossible arrangements

Fig.5-1

Six-pulse bridge circuit B6 with branch fuses

DA

94-5

048

Fig.5-2

Six-pulse bridge circuit B6 with phase fuses and DC fuses (reversing connection)

DA

94-5

051

( ) ( )

Fig.5-3

Six-pulse bridge circuit B6 with phase fuses and DC fuses (converter circuit)

DA

94-5

050

Fig.5-4

Six-pulse bridge circuit B6 with branch fuses

DA

94-5

049

Fig.5-5

Six-pulse bridge circuit B6 with branch fuses (reversing connection)

DA

94-5

052

( ) ( )

Fig.5-6

Three-phasebidirectional circuit W3 with phase fuses with branch fuses

DA

94-5

053

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Important Information

Standards

SITOR fuse links comply with the follow-ing Standards and regulations:

• DIN VDE 0636, Part 40

• IEC 60 269-4

When appropriately noted in Sections 2 and 3 ’Ordering and engineering data’ and ’Characteristics and dimension drawings’, SITOR fuse links also fulfill the following Standards and regula-tions:

• IEC 60 269-2-1VDE 0636/201(for insertion in l.v.h.b.c. fuse bases according to VDE 0636/201 as well as in fused-switch disconnectors and dis-connectors with fuses)

• u

The following Sitor fuse links and l.v.h.b.c. fuse bases are u recognized:

• IEC 60 269-4-1VDE 0636/401(for bolting to busbars) SITOR fuse links, Sizes 1 to 3 with an inside cali-per of 110 mm can also be inserted in l.v.h.b.c. fuse bases according to IEC 60 269-2-1 as well as in fused switch disconnectors and switch dis-connectors with fuses.

•All of the SITOR fuse links with rated voltages Vn ≤1000 V have the CE marking in compliance with the Low-Voltage Directive 73/23/EEC. The CE marking confirms that the products are in compliance with the require-ments as laid down in the Directive.

Environmentally-friendly recycling

In 1995, seven German manufacturers of l.v.h.b.c./h.v.h.b.c. fuse links founded a non-profit association.

l.v.h.b.c./h.v.h.b.c. Recycling

The objective is to practically and sensi-bly recycle fuse links and to define an acceptable disposal concept which ful-fills all of the requirements of today's environmental protection legislation.

The used fused links are collected, sorted and then recycled without the packaging; materials which have been melted and recovered are then recycled.

According to the rules and regulations of the association, excess funds from the recycling process are donated to a university to promote research in the area of fuse links.

More detailed information is available under:

http://www.nh-hh-recycling.de

Series Guide number

File number

3NC1 0..3NC1 4..3NC2 2..3NE1 ...3NE3 2..3NE3 3..3NE4 1..3NE8 0..-13NE8 7..-1

JFHR2 E167357

3NC1 1.. JDDZ E223216

3NC1 038-.3NC1 09.3NC1 49.3NC2 29.

IZLT2 E220063

3NH3 0303NH3 1203NH3 2303NH3 3303NH3 430

JFHR2 E171267

3NC1 451-13NC2 258-1

being processed

being processed

NH HH

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Liability exclusion

The products described here were developed as part of a complete system or machine to assume safety-related functions. Generally, a complete safety-related system includes sensors, evaluation units, signaling devices and concepts for safe shutdown. It is the responsibility of the manufacturer of a plant or machine to ensure that his complete plant or machine functions correctly. Siemens AG, its regional offices and associated companies (known in the following as "Siemens") are able to guarantee all of the proper-ties and characteristics of a complete plant or machine which Siemens itself did not design.

Siemens does not accept any liability for the recommendations which are either provided or implicitly provided in the following document. The information in this document does not represent a new guarantee, warranty or liability claims which extend beyond Siemens general conditions of supply.

Caution

Only fully authorized and trained personnel may install and use fuses.

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Ordering andEngineering Data

SITOR fuse links

SITOR fuse links for special applications

Accessories for l.v.h.b.c fuses

Accessories for cylindrical fuses

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Ordering and Engineering Data

2.1 SITOR fuse links

Order No. Weightkg

Rated voltageVn

Rated current ClearingI 2t value

AC

V

DC

V

In

A

I 2tAat 1.0 x VnA2s

3NC2 423 3)

3NC2 425 3)

3NC2 427 3)

3NC2 428 3)

3NC2 431 3)

3NC2 432 3)

0.950.950.950.950.950.95

500500500500500500

––––––

150200250300350400

330006400099000

132000249000390000

3NC2 423-33NC2 425-33NC2 427-33NC2 428-33NC2 431-33NC2 432-3

0.950.950.950.950.950.95

500500500500500500

––––––

150200250300350400

330006400099000

132000249000390000

3NC8 423 3)

3NC8 425 3)

3NC8 427 3)

3NC8 431 3)

3NC8 434 3)

0.950.950.950.950.95

660660660660660

–––––

150200250350500

176003840070400

176000448000

3NC8 423-33NC8 425-33NC8 427-33NC8 431-33NC8 434-33NC8 444-3

0.950.950.950.950.950.95

660660660660660600

––––––

150200250350500

1000

176003840070400

176000448000

2480000

3NE3 221 2)

3NE3 222 2)

3NE3 224 2)

3NE3 225 2)

3NE3 227 2)

3NE3 230-0B 2)

3NE3 231 2)

3NE3 232-0B 2)

3NE3 233 2)

0.550.550.550.550.550.550.550.550.55

100010001000100010001000100010001000

–––––––––

100125160200250315350400450

48007200

13000300004800080000

100000135000175000

Table10-1

1) Envelope dimension and pullers correspond to IEC 60269-2-1; however, contact blades are slotted according to IEC 60269-4-12) u recognized (U), for Guide Nos. and File Nos. of the Approval, refer to Section 1 ’Applications and Standards’3) Special version with 2 longitudinal slots (not shown in the diagram)

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Pre-arcingI 2t value

Power loss Utilization category

Cyclic load factorWL

Size according to IEC/EN 60 269-2-1or VDE 0636/201(or DIN 43 620)

Inside caliper according to IEC/EN 60 269-4-1or VDE 0636/401(or DIN 43 653)

Characteris-tics and dimension drawings

A2s W mm Section

70001360021000280005300083000

354050656050

gRgRgRgRaRaR

0.850.850.850.850.850.85

333333

––––––

3.1.13.1.13.1.13.1.13.1.13.1.1

70001360021000280005300083000

354050656050

gRgRgRgRaRaR

0.850.850.850.850.850.85

3 1)

3 1)

3 1)

3 1)

3 1)

3 1)

110110110110110110

3.1.13.1.13.1.13.1.13.1.13.1.1

110024004400

1100028000

40507295130

gRgRgRgRgR

0.850.850.850.850.85

33333

–––––

3.1.43.1.43.1.43.1.43.1.4

110024004400

1100028000

400000

40507295130140

gRgRgRgRgRaR

0.850.850.850.850.850.9

3 1)

3 1)

3 1)

3 1)

3 1)

3 1)

110110110110110110

3.1.43.1.43.1.43.1.43.1.43.1.4

6651040185041506650

13400166002260029500

283642425065758595

aRaRaRaRaRaRaRaRaR

0.950.951110.950.90.90.9

1 1)

1 1)

1 1)

1 1)

1 1)

1 1)

1 1)

1 1)

1 1)

110110110110110110110110110

3.1.143.1.143.1.143.1.143.1.143.1.153.1.153.1.153.1.15Kan

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Order No. Weightkg

Rated voltageVn


AC

V

DC

V

In

A

I 2tAat 1.0 x VnA2s

3NE3 332-0B 2)

3NE3 333 2)

3NE3 334-0B 2)

3NE3 335 2)

3NE3 336 2)

3NE3 337-8 2)

3NE3 338-8 2)

3NE3 340-8 2)

0.70.70.70.70.70.70.70.7

10001000100010001000

900800690

––––––––

400450500560630710800900

135000175000260000360000600000800000850000

1300000

3NE3 4213NE3 4303NE3 4323NE3 4343NE3 6263NE3 6353NE3 635-6 4)

3NE3 6363NE3 6373NE3 637-1

1.151.151.151.151.151.151.151.151.151.15

1000100010001000100010001000100010001000

––––––––––

100315400500224450450630710710

13500218000364000870000

54000488000488000

128000019500001950000

3NE4 101 2)

3NE4 102 2)

3NE4 117 2)

3NE4 118 2)

3NE4 120 2)

3NE4 121 2)

3NE4 122 2)

3NE4 124 2)

0.270.270.270.270.270.270.270.27

10001000100010001000100010001000

––––––––

3240506380

100125160

280500800

150030006000

1400029000

3NE4 327-0B3NE4 330-0B3NE4 333-0B3NE4 334-0B3NE4 337

0.70.70.70.70.7

800800800800800

–––––

250315450500710

2970060700

191000276000923000

Table12-2

1) Envelope dimension and pullers correspond to IEC 60269-2-1; however, contact blades are slotted according to IEC 60269-4-12) u recognized (U), for Guide Nos. and File Nos. of the Approval, refer to Section 1 ’Applications and Standards’3) M124) Diagram, refer to Section 4.2, 3NE6 4.., 3NE9 4..

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13







A2s W mm Section

22600295004610066400

104000149000184000223000

85909095

100105130165

aRaRaRaRaRaRaRaR

1111110.950.95

2 1)

2 1)

2 1)

2 1)

2 1)

2 1)

2 1)

2 1)

110110110110110110110110

3.1.163.1.163.1.163.1.163.1.163.1.163.1.163.1.16

18002900048500

1160007200

6500065000

170000260000260000

2580

1109585

110110132145145

aRaRaRaRaRaRaRaRaRaR

1111111111

3333333333

130130130130130130139130130140 3)

3.1.173.1.173.1.173.1.173.1.173.1.173.1.173.1.173.1.173.1.17

4075

120230450900

18003600

1213162022243035

gRgRgRaRaRaRaRaR

0.90.90.90.90.90.90.90.9

00000000

––––––––

3.1.133.1.133.1.133.1.133.1.133.1.133.1.133.1.13

36007400

2940042500

142000

105120140155155

aRaRaRaRaR

0.850.850.850.850.95

2 1)

2 1)

2 1)

2 1)

2 1)

110110110110110

3.1.123.1.123.1.123.1.123.1.12

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Order No. Weightkg

Rated voltageVn


AC

V

DC

V

In

A

I 2tAat 1.0 x VnA2s

3NE5 4243NE5 4263NE5 4303NE5 4313NE5 4333NE5 433-1

1.951.951.951.951.951.95

150015001500150015001500

––––––

160224315350450450

54000138000311000428000870000870000

3NE5 6273NE5 6333NE5 643

1.61.61.6

150015001500

–––

250450600

84000590000

1950000

3NE1 813-0 1)

3NE1 814-0 1)

3NE1 815-0 1)

3NE1 803-0 1)

3NE1 802-0 1)

3NE1 817-0 1)

3NE1 818-0 1)

3NE1 820-0 1)

0.130.130.130.130.130.130.130.13

690690690690690690690690

––––––––

1620253540506380

200430780

1700300044009000

18000

3NE1 021-0 1)

3NE1 022-0 1)

3NE1 022-2 1)

0.20.20.2

690690690

–––

100125125

330006300023000

3NE1 224-0 1)

3NE1 225-0 1)

3NE1 227-0 1)

3NE1 230-0 1)

0.550.550.550.55

690690690690

––––

160200250315

60000100000200000310000

3NE1 224-2 1)

3NE1 225-2 1)

3NE1 227-2 1)

3NE1 230-2 1)

0.550.550.550.55

690690690690

––––

160200250315

158404400068800

135500

Table14-3

1) u recognized (U), for Guide Nos. and File Nos. of the Approval, refer to Section 1 ’Applications and Standards’

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15







A2s W mm Section

7200184004150057000

116000116000

5680

115135145145

aRaRaRaRaRaR

11110.950.95

333333

210210210210210210

3.1.183.1.183.1.183.1.183.1.183.1.18

1120078500

260000

130160145

aRaRaR

111

333

170170170

3.1.193.1.193.1.19

184174

166295461903

1843

33.5455678

gR/gSgR/gSgR/gSgR/gSgR/gSgR/gSgR/gSgR/gS

11111111

000000000000000000000000

––––––––

3.1.53.1.53.1.53.1.53.1.53.1.53.1.53.1.5

310060003115

101113.5

gR/gSgR/gSgR

111

000000

–––

3.1.63.1.63.1.9

7400145002950046100

24273038

gR/gSgR/gSgR/gSgR/gS

1111

1111

––––

3.1.63.1.63.1.63.1.6

26505645

1152022580

30283542

gRgRgRgR

1111

1111

––––

3.1.93.1.93.1.93.1.9

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Order No. Weightkg

Rated voltageVn


AC

V

DC

V

In

A

I 2tAat 1.0 x VnA2s

3NE1 331-0 2)

3NE1 332-0 2)

3NE1 333-0 2)

3NE1 334-0 2)

0.70.70.70.7

690690690690

––––

350400450500

430000590000750000950000

3NE1 331-2 2)

3NE1 333-2 2)

3NE1 334-2 2)

0.70.70.7

690690690

–––

350450500

177000276000398000

3NE1 435-0 2)

3NE1 436-0 2)

3NE1 437-0 2)

3NE1 438-0 2)

0.950.950.950.95

690690690690

––––

560630710800

1700000235000034000005000000

3NE1 437-1 2)

3NE1 438-1 2)0.950.95

600600

––

710800

24600003350000

3NE1 435-2 2)

3NE1 436-2 2)

3NE1 447-2 2)

3NE1 437-2 2)

3NE1 438-2 2)

3NE1 448-2 2)

111111

690690690690690690

––––––

560630670710800850

84500013200001557000172500023480003381000

3NE7 4253NE7 4273NE7 4313NE7 4323NE7 6333NE7 633-13NE7 648-13NE7 6363NE7 636-13NE7 637-1

1.951.951.951.951.951.951.951.951.951.95

2000200020002000200020002000200020002000

––––––––––

200250350400450450525630630710

138000218000555000870000960000960000

1120000195000019500003110000

3NE9 632-13NE9 634-13NE9 636-1A

2.52.52.5

250025002500

–––

400500630

62000012700002800000

Table16-4

1) M122) u recognized (U), for Guide Nos. and File Nos. of the Approval, refer to Section 1 ’Applications and Standards’

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17







A2s W mm Section

5800084000

104000149000

42455356


1111

2222

––––

3.1.73.1.73.1.73.1.7

295004610066400

446265

gRgRgR

111

222

–––

3.1.93.1.93.1.9

215000293000437000723000

50556059


1111

3333

––––

3.1.73.1.73.1.73.1.7

321000437000

6572

gRgR

11

33

––

3.1.83.1.8

130100203000240000265000361000520000

606265728276

gRgRgRgRgRgR

111111

333333

––––––

3.1.103.1.103.1.103.1.103.1.103.1.10

184002900074000

116000128000128000149000260000260000415000

75110120150160160210220220275

aRaRaRaRaRaRaRaRaRaR

1111111111

3333333333

210210210210210210 1)

210 1)

210210 1)

210 1)

3.1.203.1.203.1.203.1.203.1.203.1.203.1.203.1.203.1.203.1.20

81000170000385000

205235275

aRaRaR

111

333

260 1)

260 1)

260 1)

3.1.213.1.213.1.21

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Order No. Weightkg

Rated voltageVn


AC

V

DC

V

In

A

I 2tAat 1.0 x VnA2s

3NE8 015-1 1)

3NE8 003-1 1)

3NE8 017-1 1)

3NE8 018-1 1)

3NE8 020-1 1)

3NE8 021-1 1)

3NE8 022-1 1)

3NE8 024-1 1)

0.20.20.20.20.20.20.20.2

690690690690690690690690

––––––––

2535506380

100125160

180400700

1400240042006500

13000

3NE8 714-13NE8 715-13NE8 701-13NE8 702-13NE8 717-13NE8 718-13NE8 720-13NE8 721-13NE8 722-13NE8 724-13NE8 725-13NE8 727-13NE8 731-1

0.130.130.130.130.130.130.130.130.130.130.130.130.13

690690690690690690690690690690690690690

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

20253240506380

100125160200250315

83140285490815

1550270049509100

17000300005500085500

3NC1 0033NC1 0063NC1 0083NC1 0103NC1 0123NC1 0163NC1 0203NC1 0253NC1 032

0.010.010.010.010.010.010.010.010.01

600600600600600600600600600

400400400400400400400400400

368

101216202532

8305070

120150260390600

3NC1 1033NC1 105

0.010.01

600600

––

35

––

Table18-5

1) u recognized (U), for Guide Nos. and File Nos. of the Approval, refer to Section 1 ’Applications and Standards’2) CLASS CC

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19







A2s W mm Section

3070

120260450850

14002800

79

141619222838

gRgRgRgRaRaRaRaR

0.950.950.950.950.950.950.950.95

0000000000000000

––––––––

3.1.113.1.113.1.113.1.113.1.113.1.113.1.113.1.11

12194069

115215380695

1250235042007750

12000

79

1012151619242832374255

gRgRgRgRgRaRaRaRaRaRaRaRaR

0.90.90.90.90.90.950.90.950.950.90.90.90.85

000000000000000000000000000000000000000

80808080808080808080808080

3.1.23.1.23.1.23.1.23.1.23.1.23.1.33.1.33.1.33.1.33.1.33.1.33.1.3

3469

1525346095

1.21.522.533.54.867.5

aRaRaRaRaRaRaRaRaR

–––––––––

10 x 3810 x 3810 x 3810 x 3810 x 3810 x 3810 x 3810 x 3810 x 38

–––––––––

3.1.223.1.223.1.223.1.223.1.223.1.223.1.223.1.223.1.22

––

2.52

2)

2)––

10 x 3810 x 38

––

3.1.233.1.23

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Order No. Weightkg

Rated voltageVn


AC

V

DC

V

In

A

I 2tAat 1.0 x VnA2s

3NC1 4013NC1 4023NC1 4033NC1 4043NC1 4053NC1 4063NC1 4103NC1 4153NC1 4203NC1 4253NC1 4303NC1 4323NC1 4403NC1 450

0.020.020.020.020.020.020.020.020.020.020.020.020.020.02

660660660660690690690690690690690690690690

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

123456

1015202530324050

––––

11–

222260

130150800980

1800

3NC1 5043NC1 5063NC1 516

0.020.020.02

690690690

46

16

–––

3NC2 2203NC2 2253NC2 2323NC2 2403NC2 2503NC2 2633NC2 2803NC2 200

0.060.060.060.060.060.060.060.06

690690690690690690690600

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

700 1)

20253240506380

100

370560850

1350112027005100

10000

Table20-6

1) u Recognized (U), for Guide Nos. and File Nos. of the Approval, refer to Section 1 ’Applications and Standards’

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A2s W mm Section

––––

1.6–

3.61026445895

110220

532.5–1.51.545.56797.689

aRaRaRaRaRaRaRaRaRaRaRaRaRaR

––––––––––––––

14 x 5114 x 5114 x 5114 x 5114 x 5114 x 5114 x 5114 x 5114 x 5114 x 5114 x 5114 x 5114 x 5114 x 51

––––––––––––––

3.1.243.1.243.1.243.1.243.1.243.1.243.1.243.1.253.1.253.1.253.1.253.1.253.1.253.1.25

–––

–––

gGgGgG

–––

14 x 5114 x 5114 x 51

–––

3.1.263.1.263.1.26

346095

185155310620

1250

4.65.678.59.5

1113.516

aRaRaRaRaRaRaRaR

––––––––

22 x 5822 x 5822 x 5822 x 5822 x 5822 x 5822 x 5822 x 58

––––––––

3.1.273.1.273.1.273.1.273.1.273.1.273.1.273.1.27

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2.2 SITOR fuse links for special applications

Order No. Weightkg

Rated voltageVn


AC

V

DC

V

In

A

I 2tAat 1.0 x VnA2s

3NC5 531 1)

3NC5 838 1)

3NC5 840 1)

3NC5 841 1)

0.671.21.41.2

80010001000

800

350800600630

2600001728000

888000888000

3NC7 327-2 2)

3NC7 331-2 2)0.70.7

680680

––

250350

6350001430000

3NE3 525-5 3)

3NE3 535-5 3)0.70.7

10001000

––

200450

44000395000

3NE4 117-5 4)

3NE4 121-5 4)

3NE4 146-5 4)

0.280.280.28

10001000

800

–––

50100170

11007400

60500

Table22-7

1) For rectifiers in electrolysis systems (these are screwed onto water-cooled busbars)2) For traction feeder rectifiers3) For SITOR thyristor sets 6QG104) For SITOR thyristor sets 6QG11

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A2s W mm Section

66000360000185000185000

80170150145

aRaRaRaR

0.90.90.90.9

––––

––––

3.2.33.2.33.2.33.2.3

244000550000

2532

aRaR

0.90.9

––

––

3.2.53.2.5

715064500

5090

aRaR

0.850.85

––

––

3.2.13.2.1

135900

7370

203543

gRaRaR

0.850.850.85

–––

–––

3.2.13.2.13.2.1

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Order No. Weightkg

Rated voltageVn


AC

V

DC

V

In

A

I 2tAat 1.0 x VnA2s

3NE4 327-6B 1)

3NE4 330-6B 1)

3NE4 333-6B 1)

3NE4 334-6B 1)

3NE4 337-6 1)

0.650.650.650.650.65

800800800800800

–––––

250315450500710

2970060700

191000276000923000

3NE6 437 2)

3NE6 444 2)

3NE9 440-6 2)

3NE9 450 2)

1.01.11.01.0

900900600600

––––

710900850

1250

620000192000024800002480000

3NE6 437-7 3)

3NE9 450-7 3)1.01.0

900600

––

7101250

6200002480000

Table24-8

1) For SITOR thyristor sets 6QG122) For air-cooled rectifiers in electrolysis systems3) For rectifiers in electrolysis systems (these are screwed onto water-cooled busbars)

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A2s W mm Section

36007400

2940042500

142000

105120140155155

aRaRaRaRaR

0.850.850.850.850.95

–––––

–––––

3.2.23.2.23.2.23.2.23.2.2

100000400000400000400000

150170

85210

gRaRgRaR

0.90.910.9

––––

––––

3.2.43.2.43.2.43.2.4

100000400000

150210

aRaR

0.90.9

––

––

3.2.43.2.4

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2.3 Accessories for l.v.h.b.c fuses

Permissible loading and required connection cross-sections when used in l.v.h.b.c fuse bases and switch disconnectors

SITORfuse link

Rated current

Required cross-section of cables/busbars

l.v.h.b.c. fuse base Suitable puller

Fuse switch disconnector

Switch disconnector with fuses

Order No.

In

A mm2 Cu Order No.

max. currentA Order No. Order No.

max. currentA Order No.

max. currentA

3NC2 423/-33NC2 425/-33NC2 427/-33NC2 428/-33NC2 431/-33NC2 432/-3

150200250300350400

7095

120185240240

3NH3 430 2) 3) 150190240285330400

3NX1 011 3NP5 4 145180225255330400

3KL61 30 145180225255330400

3NC8 423/-33NC8 425/-33NC8 427/-33NC8 431/-33NC8 434/-3

150200250350500

7095

120240

2 x 150

135180250315450

135180225300425

135180225300425

Table26-9

1) When maintaining pollution degree 2 according to DIN VDE 0660 Part 100, the rated insulation voltage of 3KL, 3KM and 3NP switch disconnectors (designed for degree of pollution 3) is 1000 V

2) The maximum currents are valid for natural air cooling. With forced cooling v ≥ 1 m/s the fuses can be used with rated current In.


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SITORfuse link

Rated current





Order No.

In

A mm2 Cu Order No.



max. currentA

3NE1 813-03NE1 814-03NE1 815-03NE1 803-0

3NE1 802-03NE1 817-03NE1 818-0

16202535

405063

1.52.546

101016

3NH3 0301)/3NH4 030

16202535

405063

3NX1 011 3NP4 0/3NP5 0

16202535

405063

3KL50 30/3KM50 30

16202535

405063

3NE1 820-0 80 25 80 80 3KL52 30/3KM52 30

80

3NE1 021-03NE1 022-0

100125

3550

100125

3NP4 0/3NP5 0

100125

100125

3NE1 224-03NE1 225-03NE1 227-0

160200250

7095

120

3NH3 2301)/3NH4 230

160200250

3NP4 2/3NP5 2

160200250

3KL55 30/3KM55 30

160200250

3NE1 230-0

3NE1 331-03NE1 332-0

315

350400

2 x 70

2 x 952 x 95

3NH3 3301) 315

350400

3NP5 3 315

350400

3KL57 30/3KM57 30

315

350400

3NE1 333-03NE1 334-0

3NE1 435-03NE1 436-0

450500

560630

2 x 1202 x 120

2 x 1502 x 185

3NH3 4301) 450500

560630

3NP5 4 450500

560630

3KL61 30 450500

560630

3NE1 437-03NE1 438-0

3NE1 437-13NE1 438-1

710800

710800

2 x (50 x 5)2 x (50 x 5)

2 x (50 x 5)2 x (50 x 5)

3NH3 430

710800

690750

3NP5 43NP5 4

710800

690750

3KL62 710800

710800

3NE1 022-2 125 50 3NH3 030/3NH4 030

125 3NP4 0/3NP5 0

125 3KL52/3KM52

125

3NE1 224-23NE1 225-23NE1 227-2

160200250

7095

120

3NH3 230/3NH4 230

160200250

3NP4 2/3NP5 2

160200250

3KL553KM55

145180220

3NE1 230-23NE1 331-2

315350

2 x 702 x 95

3NH3 330 315350

3NP5 3 315350

3KL57/3KM57

280300

Table27-10

1) u recognized (U), for Guide Nos. and File Nos. of the Approval, refer to Section 1 ’Applications and Standards’Kan

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SITORfuse link

Rated current





Order No.

In

A mm2 Cu Order No.



max. currentA

3NE1 333-23NE1 334-23NE1 435-23NE1 436-2

450500560630

2 x 1202 x 1202 x 1502 x 185

3NH3 430 450500560630

3NX1 011 3NP5 4

3NP5 4

450500560625

3KL61 450500560615

3NE1 447-23NE1 437-23NE1 438-23NE1 448-2

670710800850

2 x (40 x 5)2 x (40 x 5)2 x (50 x 5)2 x (30 x 8)

670710800850

3NP5 43NP5 43NP5 4

655685770820

3KL62 670700760790

3NE8 015-13NE8 003-13NE8 017-13NE8 018-1

25355063

46

1016

3NH3 0301)/3NH4 030

25355063

3NP4 0/3NP5 0

25354555

3KL50 303KM50 30

25354555

3NE8 020-13NE8 021-13NE8 022-13NE8 024-1

80100125160

25355070

80100125160

7085

100130

3KL52 30/3KM52 30

7085

100130

3NE4 327-0B3NE4 330-0B

250315

120240

3NH3 3302) 240300

3NP5 3 190250

3KL57 30/3KM57 30

170225

3NE4 333-0B3NE4 334-0B

450500

40 x 840 x 8

3NH3 4302) 425475

3NP5 4 420450

3KL61 301) 370425

3NE4 337 710 50 x 10 630 600 3KL62 600

3NE4 1013NE4 1023NE4 1173NE4 118

3NE4 1203NE4 1213NE4 1223NE4 124

32405063

80100125160

6101016

25355070

3NH3 1202)/3NH4 230

32405063

80100125160

3NP4 21)/3NP5 2

32405063

8095

120150

3KL55 30/3KM55 30

32405063

8095

120150

Table28-11



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SITORfuse link

Rated current





Order No.

In

A mm2 Cu Order No.



max. currentA

3NE3 2213NE3 2223NE3 2243NE3 2253NE3 227

100125160200250

35507095

120

3NH3 230 2)/3NH4 230

100125160200250

3NX1 011 3NP4 2 1)/3NP5 2

90110140175210

3KL55 30/3KM55 30

90110140175210

3NE3 230-0B3NE3 2313NE3 232-0B3NE3 233

315350400450

185240240

2 x 150

3NH3 330 2) 305335380425

3NP5 3 285310330360

3KL57 30/3KM57 30

240265290320

3NE3 332-0B3NE3 3333NE3 334-0B3NE3 335

400450500560

2402 x 1502 x 1502 x 185

3NH3 430 2) 400450500560

3NP5 4 340380450510

3KL61 30 1) 340380440500

3NE3 3363NE3 337-83NE3 338-83NE3 340-8

630710800900

2 x 1852 x 2002 x 2002 x 240

630680700750

580630630630

3KL62 570640720800

Table29-12



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2.4 Accessories for cylindrical fuses

Permissible load and required connection cross-sections when using in cylindrical fuse bases and switch disconnectors

SITO

R fu

se li

nk

Rate

dcu

rren

t

Requ

ired

co

nn

ecti

oncr

oss-

sect

ion Cylindrical fuse base

Fuse

pu

ller

Cylindrical fuse disconnector

Order No.

In

A mm2 Cu

1-phase

Order No.

Imax

A

2-phase

Order No.

Imax

A

3-phase

Order No.

Imax

AOrder No.

1-phase

Order No.

Imax

A

2-phase

Order No.

Imax

A

3-phase

Order No.

Imax

A

3NC1 0033NC1 0063NC1 0083NC1 0103NC1 0123NC1 0163NC1 0203NC1 0253NC1 032

368

101216202532

1111.51.52.52.546

3NC1 038-1

368

101216202532

3NC1 038-2

368

101216202428

3NC1 038-3

368

101216202428

3NC1 000

3NC1 091

368

101216202532

3NC1 092

36

8101216202530

3NC1 093

368

101216202529

3NC1 1033NC1 105

35

11

35

35

35

35

35

35

3NC1 4013NC1 4023NC1 4033NC1 4043NC1 4053NC1 4063NC1 4103NC1 4153NC1 4203NC1 4253NC1 4303NC1 4323NC1 4403NC1 450

123456

1015202530324050

1111111.51.52.5466

1010

3NC1 451-1

123456

1015202530324050

3NC1 491

123456

1015202528313848

3NC1 492

123456

1015202427303746

3NC1 493

123456

1015202325303644

3NC1 5043NC1 5063NC1 516

46

16

112.5

46

16

46

16

46

16

46

16

3NC2 2203NC2 2253NC2 2323NC2 2403NC2 2503NC2 2633NC2 2803NC2 200

20253240506380

100

2.546

1010162535

3NC2 258-1

20253240506380

100

3NC2 291

2025324050607495

3NC2 292

2025323948587190

3NC2 293

2025323846566985

Table30-13

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Characteristicsand Dimension Drawings

SITOR fuse links

SITOR fuse links for special applications

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Characteristics3.1 SITOR fuse links

3.1.1 3NC2 4.. (IEC 60 269-2-1, Size 3), 3NC2 4..-3 (IEC 60 269-4-1, Size 3/110) 1)

Order No. 3NC2 4233NC2 423-3

3NC2 4253NC2 425-3

3NC2 4273NC2 427-3

3NC2 4283NC2 428-3

3NC2 4313NC2 431-3

3NC2 4323NC2 432-3

Utilization category (IEC 60 269) gR gR gR gR gR aR

Rated voltage VnRated current InPre-arcing I2t value I2ts (tvs = 1 ms)Clearing I2t value I2tA at VnTemperature rise at In (center of the fuse body)Power dissipation at InCyclic load factor WLWeight, approx.

VAA2s

A2sK

W

kg

500150 2)

7000

3300026

350.850.95

500200 2)

13600

6400025

400.850.95

500250 2)

21000

9900030

500.850.95

500300 2)

28000

13200040

650.850.95

500350 2)

53000

24900035

600.850.95

500400 2)

83000

39000030

500.850.95

Accessories 3)

Fuse base, 1-poleFuse pullerFused switch disconnectorSwitch disconnector with fuses

3NH3 4303NX1 0113NP543KL61 30-1.B0

Table34-14

1) Envelope dimension and pullers correspond to IEC 60269-2-1; however, contact blades are slotted according to IEC 60269-4-12) Cooling air velocity 1 m/s. For natural air cooling, reduced by 5 %3) Maximum current and minimum required connection cross-section when using fuse bases and

switch disconnectors, refer to Section 2.3

Fig.34-7

Time/current characteristics

2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x101 x10 2 x10 3 x1042 4 6 2 4 61 1 1 18 8 8

�vs

p

200A 300A 400A

150A 250A 350A

Virt

ual p

re-a

rcin

g tim

e

Prospective short-circuit current

AD

A94-5

096b

Fig.34-8

Correction factor kA for clearing I2t value

Fig.34-9

Arc voltage

0 100 200 300 400 500 600�

1A

wRecovery voltage

Cor

rect

ion

fact

or 0.8

0.6

0.4

0.2

AD

A94

-500

0b

0 200 400 600�

800 1000 1200

400

800

1200

1600

2000

s�

w

1400

1000

600

200

0

1800

Recovery voltage

Pea

k ar

c vo

ltage

AD

A94

-509

7b

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3NC2 4..

3NC2 4..-3

Fig.35-10

Let-through characteristics (current limiting at 50 Hz)

Fig.35-11

Fig.35-12

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x103 x104 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

300A350A

400A

250A 200A

150A

c

p

Unlimited peak values:DC component 50%DC component 0%

Let-

thro

ugh

curr

ent


AD

A94

-509

8b

70

60

1814

12

81

10

6

70

108

140

71.5

11.5

AD

A94

-513

3a-x

Dimensions in mm

18

70

60

12

1814

12

14

81

10

6

70

108

140

71.5

11.5

11.5

AD

A94

-513

3a-v

Dimensions in mm

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3.1.2 3NE8 7..-1 (IEC 60 269-4-1, Size 000/80) UOrder No. 3NE8 714-1 3NE8 715-1 3NE8 701-1 3NE8 702-1 3NE8 717-1 3NE8 718-1

Utilization category (IEC 60 269)

gR gR gR gR gR aR


VAA2s

A2sK

W

kg

6902012

8340

70.90.13

6902519

14040

90.90.13

6903240

28545

100.90.13

6904069

49055

120.90.13

69050115

81560

150.90.13

69063215

155070

160.950.13

Table36-15

Fig.36-13


2 4 61x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x101 x10 2 x10 3 x1042 4 6 2 4 61 1 1 18 8 8

20A

40A

50A32A

63A25A

vs

p

Virt

ual p

re-a

rcin

g tim

e


A3N

E87

Fig.36-14


Fig.36-15

Arc voltage

0 100 200 300 400 500 600�

1

0.2

0.4

0.6

0.8

700 800

A

w

Cor

rect

ion

fact

or

AD

A94

-500

3a-v

Recovery voltage

200 400 500 600�

700 800100

s

w

300

1400

1200

1000

800

600

400

200

0

�P

eak

arc

volta

ge

AD

A94

-500

4a-v

Recovery voltage

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37

Fig.37-16


Fig.37-17

2

�

1x10

2

4

6

c

2

1x103

1x104

1x105

2

4

6

2

4

6

2

x102 x103 x104 x1052 2 4 61 1 1 18 8 8

p

�

4 6 4 6

40A50A

63A

32A 25A

20A


Let-

thro

ugh

curr

ent


AD

A94

-500

5b

40

7798 53

36

39

2

20.8

19.7

8.5

8.5

AD

A94

-504

4a

Dimensions in mm

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38

3.1.3 3NE8 7..-1 (IEC 60 269-4-1, Size 000/80) UOrder No. 3NE8 720-1 3NE8 721-1 3NE8 722-1 3NE8 724-1 3NE8 725-1 3NE8 727-1 3NE8 731-1


aR aR aR aR aR aR aR


VAA2s

A2sK

W

kg

69080380

270080

180.90.13

690100695

495075

190.950.13

6901251250

910080

230.950.13

6901602350

17000100

310.90.13

6902004200

30000120

360.90.13

6902507750

55000125

420.90.13

69031512 000

85 500150

540.850.13

Table38-16

Fig.38-18


2 4 61x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x101 x10 2 x10 3 x1042 4 6 2 4 61 1 1 18 8 8

100A

200A

250A160A

315A80A 125A

vs

p

Virt

ual p

re-a

rcin

g tim

e

Prospective short-circuit current �

A3N

E8-2

Fig.38-19


Fig.38-20

Arc voltage

0 100 200 300 400 500 600�

1

700 800

A

w

Cor

rect

ion

fact

or

AD

A94

-500

3b

Recovery voltage

0.2

0.4

0.6

0.8

200 400 500 600

�

700 800100

s

w

300

1400

1200

1000

800

600

400

200

0

�P

eak

arc

volta

ge

AD

A94

-500

4b

Recovery voltage

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39

Fig.39-21


Fig.39-22

2

A

1x10

2

4

6

c

2

1x103

1x104

1x105

2

4

6

2

4

6

2

x102 x103 x104 x1052 2 4 61 1 1 18 8 8

p

A

4 6 4 6

80A

100A125A

160A200A

250A315A

�Prospective short-circuit current

Let-

thro

ugh

curr

ent Unlimited peak values:

DC component 50%DC component 0%

AD

A94

-500

5-v

40

7798 53

36

39

2

20.8

19.7

8.5

8.5

AD

A94

-504

4a

Dimensions in mm

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40

3.1.4 3NC8 4.. (IEC 60 269-2-1, Size 3), 3NC8 4..-3 (IEC 60 269-4-1, Size 3/110) 1)

Order No. 3NC8 4233NC8 423-3

3NC8 4253NC8 425-3

3NC8 4273NC8 427-3

3NC8 4313NC8 431-3

3NC8 4343NC8 434-3 3NC8 444-3


gR gR gR gR gR aR


VAA2s

A2sK

W

kg

660150 2)

1100

1760033

400.850.95

660200 2)

2400

3840046

550.850.95

6602504400

7040095

720.850.95

660350 2)

11000

17600065

950.850.95

660500 2)

28000

44800075

1300.850.95

6001000400000

2480000110

1400.90.95

Accessories 3)


3NH3 4303NX1 0113NP543KL61 30-1AB0

–3NX1 011––

Table40-17

1) Envelope dimension and pullers correspond to IEC 60269-2-1; however, contact blades are slotted according to IEC 60269-4-12) Cooling air velocity 1 m/s. For natural air cooling, reduced by 10 %3) Maximum current and minimum required connection cross-section when using fuse bases and

switch disconnectors, refer to Section 2.3

Fig.40-23


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x102 x10 3 x10 4 x1052 4 6 2 4 61 1 1 18 8 8

�

150A 250A 500A

350A 1000A

vs

p

200A

Virt

ual p

re-a

rcin

g tim

e


AD

A94-5

099b

Fig.40-24


Fig.40-25

Arc voltage

0 100 200 300 400 500 600�

700 800

w

1000A

150A - 500A

AC

orre

ctio

n fa

ctor

0.6

0.8

1

0.4

0.2

AD

A94

-500

8c

Recovery voltage

0 200 400 600

�

800 1000 1200

400

800

1200

1600

2000

s�

w

1400

1000

600

200

0

1800

1000A

150A - 500A

Recovery voltage

Pea

k ar

c vo

ltage

AD

A94

-510

0b

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41

3NC8 4..

3NC8 4..-3

Fig.41-26


Fig.41-27

Fig.41-28

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x103 x104 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

500A

250A 200A

150A

350A

1000A

c

p


Let-

thro

ugh

curr

ent �


AD

A94

-510

1c

70

60

1814

12

81

10

6

70

108

140

71.5

11.5

AD

A94

-513

3a-x

Dimensions in mm

18

70

60

12

1814

12

14

81

10

6

70

108

140

71.5

11.5

11.5

AD

A94

-513

3a-v

Dimensions in mm

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42

3.1.5 3NE1 8..-0 (IEC 60 269-2-1, Size 000) UOrder No. 3NE1813-0 3NE1814-0 3NE1815-0 3NE1803-0 3NE1802-0 3NE1817-0 3NE1818-0 3NE1820-0


gR/gS gR/gS gR/gS gR/gS gR/gS gR/gS gR/gS gR/gS

Rated voltage VnRated current InPre-arcing I2t value I2ts (tvs = 1 ms)Clearing I2t value I2tA at VnTemperature rise at In (center of the fuse body) 1)

Power dissipation at In 1)

Cyclic load factor WLWeight, approx.

VAA2s

A2sK

W

kg

6901618

20025

3.01.00.13

6902041

43025

3.51.00.13

6902574

78030

4.01.00.13

69035166

170035

5.01.00.13

69040295

300030

5.01.00.13

69050461

440035

6.01.00.13

69063903

900040

7.01.00.13

690801843

1800040

8.01.00.13

Accessories 2)

Fuse base, 1-poleFuse base, 3-poleFuse pullerFused switch disconnector

3NH3 0303NH4 0303NX1 0113NP40/3NP50


3KL50 30-1.B003KM50 30-1.B00

3KL5230-1.B003KM5230-1.B00

Table42-18

1) Temperature rise and power dissipation when used in an l.v.h.b.c. fuse base2) Minimum required connection cross-section when using the fuse base and switch disconnector, refer to Section2.3

Fig.42-29


�

�p

vs

1x104

64

2

1x103

64

2

1x102

64

2

1x101

64

2

1x100

64

2

1x10-1

64

2

1x10-2

64

2

1x10-3

16A 25A 40A 63A

20A 35A 50A 80A

1x10 1

2 4 6 8 1x10 2

2 4 6 8 1x10 3

2 4 6 8 1x10 4


Virt

ual p

re-a

rcin

g tim

e

AD

A94

-508

7c

Fig.42-30


Fig.42-31

Arc voltage

0 100 200 300 400 500 600�

1

700 800

3NE 18...-0

A

w

Cor

rect

ion

fact

or 0.8

0.6

0.4

0.2

AD

A94

-508

5b

Recovery voltage

200 400 500 600�

700 800100 300

1400

1200

1000

800

600

400

200

0

�s

w

Pea

k ar

c vo

ltage

AD

A94

-508

6d

Recovery voltage

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43

Fig.43-32


Fig.43-33

2

�

1x10

2

4

6

1

1x102

x101 x102 x10561 1 18 8

�

4 6 2x103184 6 2

x104184 6 2 4

2

4

6

1x103

2

4

6

1x104

2

4

6

1x105

80A

50A

35A

20A

63A

40A

25A

16A

p

c



Let-

thro

ugh

curr

ent

AD

A94

-509

0c

15

21

6

20

10

40.5

79.9

53.8

50.3

2.3

35.8

53.3

AD

A94

-514

4a

Dimensions in mm

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44

3.1.6 3NE1 0..-0 (IEC 60 269-2-1, Size 00), 3NE1 2..-0 (IEC 60 269-2-1, Size 1) UOrder No. 3NE1 021-0 3NE1 022-0 3NE1 224-0 3NE1 225-0 3NE1 227-0 3NE1 230-0


gR/gS gR/gS gR/gS gR/gS gR/gS gR/gS




VAA2s

A2sK

W

kg

6901003100

3300036

101.00.20

6901256000

6300040

111.00.20

6901607400

6000060

241.00.55

69020014500

10000065

271.00.55

69025029500

20000075

301.00.55

69031546100

31000080

381.00.55

Accessories 2)

Fuse base, 1-poleFuse base, 3-pole

3NH3 0303NH4 030

3NH3 2303NH4 230

3NH3 330

Fuse puller 3NX1 011Fused switch disconnector


3NP403NP503KL52 30-1.B003KM52 30-1.B00

3NP423NP523KL55 30-1.B003KM55 30-1.B00

3NP53

3KL57 30-1.B003KM57 30-1.B00

Table44-19

1) Temperature rise and power dissipation when used in an l.v.h.b.c. fuse base2) Minimum required connection cross-section when using the fuse base and switch disconnector, refer to Section 2.3

Fig.44-34


2

46

2

46

2

46

2

46

2

46

�

�

vs

p

2

461x104

1x103

2

46

1x102

1x101

1x100

1x10-1

1x10-2

1x10-3

1x10 2

642 8 1x10 3

642 8 1x10 4

64 82 1x10 5

100A 160A 250A

125A 200A 315A

Virt

ual p

re-a

rcin

g tim

e


AD

A94-5

127b

Fig.44-35


Fig.44-36

Arc voltage

0 100 200 300 400 500 600

�

1

700 800

3NE 10...-0

A

w

3NE 12...-0

Cor

rect

ion

fact

or

0.2

0.4

0.6

0.8

AD

A94

-512

8b

Recovery voltage

200 400 500 600�

700 800100 300

1400

1200

1000

800

600

400

200

0

�s

w

Pea

k ar

c vo

ltage

AD

A94

-508

6d

Recovery voltage

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3NE1 0..-0 3NE1 2..-0

Fig.45-37


Fig.45-38

Fig.45-39

2

�

1x10

2

4

6

1

1x102

x101 x10 2 x10561 1 18 8

�

4 6 2x10 3184 6 2

x10 4184 6 2 4

2

4

6

1x103

2

4

6

1x104

2

4

6

1x105

315A250A

200A160A

125A100A

p

c



Let-

thro

ugh

curr

ent

AD

A94

-508

9c

10

630

15

60 48

53

79

35.8

49.4

2.2

AD

A94

-513

6b

Dimensions in mm

10

6

52

25 52

3

73

135

40.5

63.5

66.5

AD

A94

-514

5a

Dimensions in mm

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46

3.1.7 3NE1 3..-0 (IEC 60 269-2-1, Size 2), 3NE1 4..-0 (IEC 60 269-2-1, Size 3) UOrder No. 3NE1

331-03NE1 332-0

3NE1 333-0

3NE1 334-0

3NE1 435-0

3NE1 436-0

3NE1 437-0

3NE1 438-0


gR/gS gR/gS gR/gS gR/gS gR/gS gR/gS gR/gS gR/gS



Cyclic load factor WLWeight. approx.

VAA2s

A2sK

W

kg

69035058000

43000075

421.00.7

69040084000

59000085

451.00.7

690450104000

75000085

531.00.7

690500149000

95000090

561.00.7

690560215000

170000065

501.00.95

690630293000

235000070

551.00.95

690710437000

340000068

601.00.95

690800723000

500000070

591.00.95

Accessories 2)

Fuse base, 1-pole 3NH3 330 3NH3 430Fuse puller 3NX1 011Fused switch disconnectorSwitch disconnector with fuses

3NP533KL57 30-1.B003KM57 30-1.B00

3NP543KL61 30-1AB0

3NP543KL62

Table46-20


Fig.46-40


�

�

vs

p

1x104

64

2

1x103

64

2

1x102

64

2

1x101

64

2

1x100

64

2

1x10-1

64

2

1x10-2

64

2

1x10-3

1x102

2 4 6 8 1x103

2 4 6 8 1x104

2 4 6 8 1x105

800A710A630A560A500A450A400A350A

Virt

ual p

re-a

rcin

g tim

e


AD

A9

4-5

088

d

Fig.46-41


Fig.46-42

Arc voltage

0 100 200 300 400 500 600�

1

700 800

3NE1 3..-03NE1 4..-0

w

AC

orre

ctio

n fa

ctor 0.8

0.6

0.4

0.2

AD

A94

-512

6c

Recovery voltage

200 400 500 600�

700 800100 300

1400

1200

1000

800

600

400

200

0

�s

w

Pea

k ar

c vo

ltage

AD

A94

-508

6d

Recovery voltage

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3NE1 3..-0 3NE1 4..-0

Fig.47-43


Fig.47-44

Fig.47-45

2

�

1x10

2

4

6

1

1x102

x101 x102 x10561 1 18 8

�

4 6 2x103184 6 2

x104184 6 2 4

2

4

6

1x103

2

4

6

1x104

2

4

6

1x105

630A560A

500A450A

400A350A

p

c

800A710A



Let-

thro

ugh

curr

ent �

AD

A94

-512

9d

10

6

60

25

72

3

73

149

6047.5

66.5

AD

A94

-514

6b

Dimensions in mm

10

6

70

68

70

151

32

73

60.4

82.1

2.5

AD

A94

-514

7

Dimensions in mmKanch

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48

3.1.8 3NE1 4..-1 (IEC 60 269-2-1, Size 3) UOrder No. 3NE1 437-1 3NE1 438-1


gR gR




VAA2s

A2sK

W

kg

600710321000

246000085

651.00.95

600800437000

335000095

721.00.95

Accessories 2)

Fuse base, 1-pole 3NH3 430Fuse puller 3NX1 011Fused switch disconnectorSwitch disconnector with fuses

3NP543KL62 30

Table48-21


Fig.48-46


�

�

vs

p

1x104

64

2

1x103

64

2

1x102

64

2

1x101

64

2

1x100

64

2

1x10-1

64

2

1x10-2

64

2

1x10-3

1x102

2 4 6 8 1x103

2 4 6 8 1x104

2 4 6 8 1x105

800A710A

Virt

ual p

re-a

rcin

g tim

e


AD

A9

4-5

088

c-v

Fig.48-47


Fig.48-48

Arc voltage

0 100 200 300 400 500 600

�

1

700 800

w

AC

orre

ctio

n fa

ctor 0.8

0.6

0.4

0.2

AD

A94

-512

6-v

Recovery voltage

200 400 500 600�

700 800100 300

1400

1200

1000

800

600

400

200

0

�s

w

Pea

k ar

c vo

ltage

AD

A94

-508

6-v

Recovery voltage

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Fig.49-49


Fig.49-50

2

�

1x10

2

4

6

1

1x102

x101 x102 x10561 1 18 8

�

4 6 2x103184 6 2

x104184 6 2 4

2

4

6

1x103

2

4

6

1x104

2

4

6

1x105

p

c

800A710A



Let-

thro

ugh

curr

ent �

AD

A94

-512

9c-v

10

6

70

68

70

151

32

73

60.4

82.1

2.5

AD

A94

-514

7


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50

3.1.9 3NE1 0..-2 (Size 00), 3NE1 2..-2 (Size 1), 3NE1 3..-2 (Size 2), IEC 60 269-2-1 UOrder No. 3NE1

022-23NE1 224-2

3NE1 225-2

3NE1 227-2

3NE1 230-2

3NE1 331-2

3NE1 333-2

3NE1 334-2


gR gR gR gR gR gR gR gR




VAA2s

A2sK

W

kg

6901253115

2300055

13.51.00.2

6901602650

1584070

301.00.55

6902005645

4400062

281.00.55

69025011520

6880070

351.00.55

69031522580

13550075

421.00.55

69035029500

17700082

441.00.7

69045046100

276000100

621.00.7

69050066400

398000100

651.00.7

Accessories 2)

Fuse base, 1-pole 3NH3 030 3NH3 230 3NH3 330 3NH3 340Fuse puller 3NX1 011Fused switch disconnectorSwitch disconnector with fuses

3NP503KL52

3NP523KL55

3NP533KL57

3NP543KL61

Table50-22


Fig.50-51


2 4 6x102 x10 3 x10 4 x105

2 4 6 2 4 61 1 1 18 8 8

1x104

64

2

1x103

64

2

1x102

64

2

1x101

64

2

1x100

64

2

1x10-1

64

2

1x10-2

64

2

1x10-3

�vs

�

125A160A

250A200A

350A315A

450A500A

3NE

10-2

1

p

A

Virt

ual p

re-a

rcin

g tim

e


Fig.50-52


Fig.50-53

Arc voltage

0 100 200 300 400 500 600�

700 800

A

w

1

125A

160A

3NE

10-2

2

Cor

rect

ion

fact

or

A

0.8

0.6

0.4

0.2

Recovery voltage

0 200�

�

w

s

2000

1800

1000

800

400

200

400 600 800

3NE

10-2

3

0

160-315A

350A

125A

600

1200

1400

1600

1000 1200

A

Pea

k ar

c vo

ltage

Recovery voltage

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51

3NE1 0..-2 3NE1 2..-2

3NE1 3..-2

Fig.51-54


Fig.51-55

Fig.51-56

Fig.51-57

21x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

x102 x10 3 x10 4 x1052 2 4 61 1 1 18 8 84 6 4 6

p

c�

3NE

10-2

4

�

A


Let-

thro

ugh

curr

ent


10

630

15

60 48

53

79

35.8

49.4

2.2

AD

A94

-513

6b

Dimensions in mm

10

6

52

25 52

3

73

135

40.5

63.5

66.5

AD

A94

-514

5a

Dimensions in mm

10

6

60

25

72

3

73

149

6047.5

66.5

AD

A94

-514

6b

Dimensions in mm

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52

3.1.10 3NE1 4..-2 (IEC 60 269-2-1, Size 3) UOrder No. 3NE1 435-2 3NE1 436-2 3NE1 447-2 3NE1 437-2 3NE1 438-2 3NE1 448-2


gR gR gR gR gR gR




VAA2s

A2sK

W

kg

690560130000

84500080

601.01.0

690630203000

132000082

621.01.0

690670240000

155700090

651.01.0

690710265000

172500090

721.01.0

690800361000

234800095

821.01.0

690850520000

338100095

761.01.0

Accessories 2)

Fuse base, 1-pole 3NH3 340Fuse puller 3NX1 011Fused switch disconnectorSwitch disconnector with fuses

3NP543KL61

3NP543KL62

Table52-23


Fig.52-58


2 4 6x102 x10 3 x10 4 x105

2 4 6 2 4 61 1 1 18 8 8

1x104

64

2

1x103

64

2

1x102

64

2

1x101

64

2

1x100

64

2

1x10-1

64

2

1x10-2

64

2

1x10-3

�vs

�

560A630A

850A800A710A670A

3NE

14-2

1

p

A

Virt

ual p

re-a

rcin

g tim

e


Fig.52-59


Fig.52-60

Arc voltage

0 100 200 300 400 500 600�

700 800

A

w

1

3NE

14-2

2

Cor

rect

ion

fact

or

A

0.8

0.6

0.4

0.2

Recovery voltage

0 200�

�

w

s

2000

1800

1000

800

400

200

400 600 800

3NE

14-2

3

0

600

1200

1400

1600

1000 1200

A

Pea

k ar

c vo

ltage

Recovery voltage

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53

Fig.53-61


Fig.53-62

21x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

x102 x10 3 x10 4 x1052 2 4 61 1 1 18 8 84 6 4 6

p

c�

�

3NE

14-2

4

850A800A

710A670A

630A560A

A


Let-

thro

ugh

curr

ent


10

6

70

68

70

151

32

73

60.4

82.1

2.5

AD

A94

-514

7


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54

3.1.11 3NE8 0..-1 (IEC 60 269-2-1, Size 00) UOrder No. 3NE8015-1 3NE8003-1 3NE8017-1 3NE8018-1 3NE8020-1 3NE8021-1 3NE8022-1 3NE8024-1


gR gR gR gR aR aR aR aR


VAA2s

A2sK

W

kg

6902530

18035

70.950.20

6903570

40045

90.950.20

69050120

70065

140.950.20

69063260

140070

160.950.20

69080450

240080

190.950.20

690100850

420090

220.950.20

6901251400

6500110

280.950.20

6901602800

13000130

380.950.20

Accessories 1)

Fuse base, 1-poleFuse base, 3-poleFuse pullerFused switch disconnector

3NH3 0303NH4 0303NX1 0113NP403NP50

Switch disconnector with fuses 3KL50 30-1.B003KM50 30-1.B00

3KL52 30-1.B003KM52 30-1.B00

Table54-24

1) Max. current and min. required connection cross-section when using fuse bases and switch disconnector, refer to Section 2.3

Fig.54-63


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x10 0

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x101 x10 2 x10 3 x1042 4 6 2 4 61 1 1 18 8 8

�

p

vs

35A 63A 100A 160A

25A 50A 80A 125A


Virt

ual p

re-a

rcin

g tim

e

AD

A94-5

131b

Fig.54-64


Fig.54-65

Arc voltage

0 100 200 300 400 500 600�

1

700 800

A

w

Cor

rect

ion

fact

or 0.8

0.6

0.4

0.2

AD

A94

-513

2b

Recovery voltage

0 200 400 600�

800 1000 1200

400

800

1200

1600

2000

s�

w

1400

1000

600

200

0

1800

Pea

k ar

c vo

ltage

AD

A94

-514

8b

Recovery voltage

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55

Fig.55-66


Fig.55-67

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x10 3 x10 4 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

25A

35A

63A80A

100A125A

160A

50A

c

p


Let-

thro

ugh

curr

ent


AD

A94

-502

8b

10

630

15

60 48

53

79

35.8

49.4

2.2

AD

A94

-513

6b

Dimensions in mm

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56

3.1.12 3NE4 3..-0B, 3NE4 337 (IEC 60 269-4-1, Size 2/110) 1)

Order No. 3NE4 327-0B 3NE4 330-0B 3NE4 333-0B 3NE4 334-0B 3NE4 337


aR aR aR aR aR


VAA2s

A2sK

W

kg

8002503600

29700175

1050.850.7

8003157400

60700170

1200.850.7

80045029400

191000190

1400.850.7

80050042500

276000195

1550.850.7

800710142000

923000170

1550.950.7

Accessories 2)

Fuse base, 1-pole 3NH3 330 3NH3 430Fuse puller 3NX1 011Fused switch disconnectorSwitch disconnector with fuses

3NP533KL57 30-1.B003KM57 30-1.B00

3NP543KL61

3NP543KL62

Table56-25

1) Envelope dimension and pullers correspond to IEC 60269-2-1; however contact blades are slotted according to IEC 60269-4-12) Max. current and min. required connection cross-section when using fuse bases and switch disconnector, refer to Section 2.3

Fig.56-68


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x102 x10 3 x10 4 x1052 4 6 2 4 61 1 1 18 8 8

250A

�

315A

450A

500A

710A

vs

p

Virt

ual p

re-a

rcin

g tim

e


AD

A94-5

102b

Fig.56-69


Fig.56-70

Arc voltage

0 100 200 300 400 500 600�

700 800

450A

315A

A

w

Cor

rect

ion

fact

or

1

0.2

0.4

0.6

0.8

AD

A94

-500

9b

Recovery voltage

0 200 400 600�

800 1000 1200

400

800

1200

1600

2000�

1400

1000

600

200

0

1800

s

w

Pea

k ar

c vo

ltage

Recovery voltage

AD

A94

-510

3b

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57

Fig.57-71


Fig.57-72

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x103 x104 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

500A

250A

710A

315A

450A

c

p


Let-

thro

ugh

curr

ent �


AD

A94

-510

4b

60

7148

10

6

60

10.5

14.5

11.5

12.5

14.5

11.5

12.5

107.5

141.5

73.5 10.5

AD

A94-5

134a

Dimensions in mm

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58

3.1.13 3NE4 1.. (IEC 60 269-2-1, Size 0) UOrder No. 3NE4 101 3NE4 102 3NE4 117 3NE4 118 3NE4 120 3NE4 121 3NE4 122 3NE4 124


gR gR gR aR aR aR aR aR


VAA2s

A2sK

W

kg

10003240

28045

120.90.27

10004075

50050

130.90.27

100050120

80065

160.90.27

100063230

150078

200.90.27

100080450

300082

220.90.27

1000100900

600085

240.90.27

10001251800

14000100

300.90.27

10001603600

29000120

350.90.27

Accessories 1)

Fuse base, 1-poleFuse base, 3-poleFuse pullerFused switch disconnectorSwitch disconnector with fuses

3NH3 1203NH4 2303NX1 0113NP42, 3NP523KL55 30-1.B003KM55 30-1.B00

Table58-26

1) Max. current and min. required connection cross-section when using fuse bases and switch disconnector, refer to Section 2.3

Fig.58-73


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x10 0

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x101 x10 2 x10 3 x1042 4 6 2 4 61 1 1 18 8 8

�vs

p

125A32A 50A 80A

40A 63A 100A 160A

Virt

ual p

re-a

rcin

g tim

e


AD

A94-5

105b

Fig.58-74


Fig.58-75

Arc voltage

0 200 400 600�

1

800 1000

A

w

Cor

rect

ion

fact

or 0.8

0.6

0.4

0.2

AD

A94

-501

0b

Recovery voltage

0 200 400 600�

800 1000 1200

500

1000

1500

2000

2500�

0

s

w

Pea

k ar

c vo

ltage

Recovery voltage

AD

A94

-510

6b

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59

Fig.59-76


Fig.59-77

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x103 x104 x10 52 2 4 61 1 1 18 8 8

�

4 6 4 6

63A

32A

80A

40A

50A

125A

100A

160A

c

p


Let-

thro

ugh

curr

ent �


AD

A94

-510

7b

DA

94-5

135a

35 4758

125

65

10

6

30

1514

Dimensions in mm

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60

3.1.14 3NE3 22. (IEC 60 269-4-1, Size 1/110) 1) UOrder No. 3NE3 221 3NE3 222 3NE3 224 3NE3 225 3NE3 227


aR aR aR aR aR


VAA2s

A2sK

W

kg

1000100665

480065

280.950.55

10001251040

720070

360.950.55

10001601850

1300090

421.00.55

10002004150

3000080

421.00.55

10002506650

4800090

501.00.55

Accessories 2)

Fuse base, 1-poleFuse base, 3-poleFuse pullerFused switch disconnectorSwitch disconnector with fuses

3NH3 2303NH4 2303NX1 0113NP42, 3NP523KL55 30-1.B003KM55 30-1.B00

Table60-27


Fig.60-78


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x101 x10 2 x10 3 x1042 4 6 2 4 61 1 1 18 8 8

�vs

p

125A 200A

250A160A100A

Virt

ual p

re-a

rcin

g tim

e


AD

A94

-501

1c

Fig.60-79


Fig.60-80

Arc voltage

0 200 400 600�

1

800 1000

w

AC

orre

ctio

n fa

ctor

0.2

0.4

0.6

0.8

AD

A94

-501

3b

Recovery voltage

0 200 400 600�

800 1000 1200

�

w

s

2500

2000

1500

1000

500

AD

A94

-501

5b

Pea

k ar

c vo

ltage

Recovery voltage

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61

Fig.61-81


Fig.61-82

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x10 3 x10 4 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

100A

125A160A

200A250A

p

c



Let-

thro

ugh

curr

ent

AD

A94

-501

6b

31135

52

52 DA

94-5

045x

-a

6 73

10 110

12.5

12.5

10.5

A

12.5

40.5

13.5

10.5

63.5

Dimensions in mm

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62

3.1.15 3NE3 23. (IEC 60 269-4-1, Size 1/110) 1) UOrder No. 3NE3 230-0B 3NE3 231 3NE3 232-0B 3NE3 233


aR aR aR aR


VAA2s

A2sK

W

kg

100031513400

80000100

650.950.55

100035016600

100000120

750.90.55

100040022600

135000140

850.90.55

100045029500

175000130

950.90.55

Accessories 2)


3NH3 3303NX1 0113NP533KL57 30-1.B003KM57 30-1.B00

Table62-28


Fig.62-83


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x101 x10 2 x10 3 x1042 4 6 2 4 61 1 1 18 8 8

�

400A

450A

315A

350A

vs

p

Virt

ual p

re-a

rcin

g tim

e


AD

A94

-501

2b

Fig.62-84


Fig.62-85

Arc voltage

0 200 400 600�

1

800 1000

w

AC

orre

ctio

n fa

ctor

0.2

0.4

0.6

0.8

AD

A94

-501

3b

Recovery voltage

0 200 400 600�

800 1000 1200

�

w

s

2500

2000

1500

1000

500

AD

A94

-501

5b

Pea

k ar

c vo

ltage

Recovery voltage

Kanch

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63

Fig.63-86


Fig.63-87

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x10 3 x10 4 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

400A450A

350A

315A

c

p


Let-

thro

ugh

curr

ent �


AD

A94

-501

7b

31135

52

52 DA

94-5

045x

-a

6 73

10 110

12.5

12.5

10.5

A

12.5

40.5

13.5

10.5

63.5

Dimensions in mm

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64

3.1.16 3NE3 3.. (IEC 60 269-4-1, Size 2/110) 1) UOrder No. 3NE3 332-0B 3NE3 333 3NE3 334-0B 3NE3 335 3NE3 336 3NE3 337-8 3NE3 338-8 3NE3 340-8


aR aR aR aR aR aR aR aR


VAA2s

A2sK

W

kg

100040022600

135000120

851.00.7

100045029500

175000125

901.00.7

100050046100

260000115

901.00.7

100056066400

360000120

951.00.7

1000630104000

600000110

1001.00.7

900710149000

800000125

1051.00.7

800800184000

850000140

1300.950.7

690900223000

1300000160

1650.950.7

Accessories 2)

Fuse base, 1-poleFuse pullerFused switch disconnector

3NH3 4303NX1 0113NP54

Switch disconnector with fuses 3KL61 30-1AB0 3KL62

Table64-29


Fig.64-88


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x102 x10 3 x104 x1052 4 6 2 4 61 1 1 18 8 8

�

450A

500A

400A

560A

630A

710A

800A

vs

p

900A

Virt

ual p

re-a

rcin

g tim

e


AD

A94

-501

8b

Fig.64-89


Fig.64-90

Arc voltage

0 200 400 600�

1

800 1000

800A710A

400-630A

A

w

900AC

orr

ect

ion

fa

cto

r 0.8

0.6

0.4

0.2

AD

A94

-501

9c

Recovery voltage

0 200 400 600�

800 1000 1200

�

w

s

2500

2000

1500

1000

500

AD

A94

-501

5b

Pea

k ar

c vo

ltage

Recovery voltage

Kanch

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65

Fig.65-91


Fig.65-92

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x10 3 x104 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

500A450A

560A

400A

p

c

800A

630A710A

900AUnlimited peak values:DC component 50%DC component 0%


Let-

thro

ugh

curr

ent

AD

A94

-502

0c

38

149

60

60

6

110

73

10

72

15 10.5

12.5

12.5

10.5

AD

A94

-504

5a

47.5

19.5

Dimensions in mm

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66

3.1.17 3NE3 4.., 3NE3 6.. (IEC 60 269-4-1, Size 3/130)

Order No. 3NE3 421 3NE3 626 3NE3 430 3NE3 432 3NE3 6353NE3 635-6

3NE3 434 3NE3 636 3NE3 637,3NE3 637-11)




VAA2s

A2sK

W

kg

10001001800

1350045

251.01.15

10002247200

54000140

851.01.15

100031529000

218000120

801.01.15

100040048500

364000130

1101.01.15

100045065000

488000150

1101.01.15

1000500116000

870000120

951.01.15

1000630170000

1280000136

1321.01.15

1000710260000

1950000170

1451.01.15

Table66-30

1) Inside caliper 140 mm, M 12-screw connection

Fig.66-93


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x102 x103 x10 4 x1052 4 6 2 4 61 1 1 18 8 8

�

100A

224A

315A

400A

450A

500A

630A

710A

vs


AD

A94

-502

1b

Virt

ual p

re-a

rcin

g tim

e

p

Fig.66-94


Fig.66-95

Arc voltage

0 200 400 600�

1

800 1000

A

w

Cor

rect

ion

fact

or

0.2

0.4

0.6

0.8

AD

A94

-502

2b

Recovery voltage

0 200 400 600�

800 1000 1200

400

800

1200

1600

2000�

1400

1000

600

200

0

1800

s

w

Pea

k ar

c vo

ltage

Recovery voltage

AD

A94

-510

8bKanch

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67

3NE3 4.., 3NE3 6.., 3NE3 6..-1 3NE3 635-6

Fig.67-96


Fig.67-97

Fig.67-98

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x10 3 x10 4 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

710A630A

500A450A

400A315A

224A

100A

p

c



Let-

thro

ugh

curr

ent

AD

A94

-502

3b

10

6

70

a

b

c

c70

60 81

141418

12

1418

12

91.5

AD

A94

-513

7a

Dimensions in mm

10

70

M10

�28

70 b

a

10

81.5 AD

A94

-516

3a

Dimensions in mm

Order No. a b c

3NE3 4..3NE3 6..3NE3 6..-1

128128138

160160170

11.511.513

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68

3.1.18 3NE5 4.., 3NE5 433-1 (IEC 60 269-4-1, Size 3/210)

Order No. 3NE5 424 3NE5 426 3NE5 430 3NE5 431 3NE5 4333NE5 433-1


aR aR aR aR aR


VAA2s

A2sK

W

kg

15001607200

5400075

561.01.95

150022418400

138000100

801.01.95

150031541500

311000125

1151.01.95

150035057000

428000150

1351.01.95

1500450116000

870000150

1450.951.95

Table68-31

Fig.68-99


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x10 0

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x102 x10 3 x10 4 x1052 4 6 2 4 61 1 1 18 8 8

�vs

p

224A

450A315A160A

350A


Virt

ual p

re-a

rcin

g tim

e

AD

A94-5

109b

Fig.68-100


Fig.68-101

Arc voltage

0 500

�

1

15001000

w

AC

orre

ctio

n fa

ctor

0.2

0.4

0.6

0.8

AD

A94

-502

9b

Recovery voltage

0 400 800 1200�

1600 2000 2400

800

1600

2400

3200

4000�

2800

2000

1200

400

0

3600

s

w

Pea

k ar

c vo

ltage

Recovery voltage

AD

A94

-511

0bKanch

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69

Fig.69-102


Fig.69-103

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x103 x104 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

450A

315A 224A

160A

350A

p

c



Let-

thro

ugh

curr

ent �

AD

A94

-511

1b

10

6

70

208

a70

60 81

1418

12

1418

12

240a171.5

AD

A94

-513

8a

Dimensions in mm

Order No. a

3NE5 4..3NE5 4..-1

11.513

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70

3.1.19 3NE5 6.. (IEC 60 269-4-1, Size 3/170)

Order No. 3NE5 627 3NE5 633 3NE5 643


aR aR aR


VAA2s

A2sK

W

kg

150025011200

84000170

1301.01.6

150045078500

590000170

1601.01.6

1500600260000

1950000160

1451.01.6

Table70-32

Fig.70-104


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x10 0

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x102 x10 3 x10 4 x1052 4 6 2 4 61 1 1 18 8 8

�

250A

450A

600A

vs

p

Virt

ual p

re-a

rcin

g tim

e


AD

A94-5

112b

Fig.70-105


Fig.70-106

Arc voltage

0 500

�

1

15001000

w

AC

orre

ctio

n fa

ctor

0.2

0.4

0.6

0.8

AD

A94

-502

9b

Recovery voltage

0 400 800 1200�

1600 2000 2400

800

1600

2400

3200

4000�

2800

2000

1200

400

0

3600

s

w

Pea

k ar

c vo

ltage

Recovery voltage

AD

A94

-511

0bKanch

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71

Fig.71-107


Fig.71-108

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x10 2 x10 3 x104 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

600A

250A

450A

c

p


Let-

thro

ugh

curr

ent


AD

A94

-511

3b

10

6

70

168

70

60 81

1418

12

1418

12

200

11.5

131.5 11.5

AD

A94

-513

9a

Dimensions in mm

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72

3.1.20 3NE7 4.., 3NE7 6.. (IEC 60 269-4-1, Size 3/210)

Order No. 3NE7425 3NE7427 3NE7431 3NE7432 3NE7633,3NE7633-1 1)

3NE7648-1 1) 3NE7636,3NE7636-1 1)

3NE7637-1 1)




VAA2s

A2sK

W

kg

200020018400

13800085

751.01.95

200025029000

218000110

1101.01.95

200035074000

555000105

1201.01.95

2000400116000

870000130

1501.01.95

2000450128000

960000165

1601.01.95

2000525149000

1120000210

2101.01.95

2000630260000

1950000200

2201.01.95

2000710415000

3110000230

2751.01.95

Table72-33

1) M 12-screw connection

Fig.72-109


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x102 x10 3 x10 4 x1052 4 6 2 4 61 1 1 18 8 8

�

710A630A525A450A400A

350A

250A

200A

vs

p

Virt

ual p

re-a

rcin

g tim

e


AD

A94

-503

0c

Fig.72-110


Fig.72-111

Arc voltage

0�

1

20001000500 1500

A

w

Cor

rect

ion

fact

or 0.8

0.6

0.4

0.2

AD

A94

-503

1b

Recovery voltage

0 400 800 1200�

1600 2000 2400

800

1600

2400

3200

4000�

2800

2000

1200

400

0

3600

s

w

Pea

k ar

c vo

ltage

Recovery voltage

AD

A94

-511

4bKanch

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73

Fig.73-112


Fig.73-113

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x10 3 x10 4 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

250A

200A

710A 630A

525A

400A, 450A

350A

c

p


Let-

thro

ugh

curr

ent


AD

A94

-503

2b

10

6

70

208

a70

60 81

1418

12

1418

12

240a171.5

AD

A94

-513

8a

Dimensions in mm

Order No. a

3NE7 4..3NE7 6..3NE7 6..-1

11.511.513

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74

3.1.21 3NE9 6.. (IEC 60 269-4-1, Size 3/260)

Order No. 3NE9 632-1 3NE9 634-1 3NE9 636-1A


aR aR aR


VAA2s

A2sK

W

kg

250040081000

620000160

2051.02.5

2500500170000

1270000180

2351.02.5

2500630385000

2800000198

2751.02.5

Table74-34

Fig.74-114


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x102 x10 3 x10 4 x1052 4 6 2 4 61 1 1 18 8 8

�

400A

500A

630A

vs

p

Virt

ual p

re-a

rcin

g tim

e


AD

A94

-503

3b

Fig.74-115


Fig.74-116

Arc voltage

0�

1

20001200400 1600800 2400 2800

w

AC

orre

ctio

n fa

ctor

0.2

0.4

0.6

0.8

AD

A94

-503

4b

Recovery voltage

0 500 1000 1500�

2000 2500 3000

1000

2000

6000�

3000

4000

5000s

w

Pea

k ar

c vo

ltage

AD

A94

-503

5b

Recovery voltage

Kanch

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75

Fig.75-117


Fig.75-118

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x10 3 x10 4 x10 52 2 4 61 1 1 18 8 8

�

4 6 4 6

630A

500A

400A

p

c



Let-

thro

ugh

curr

ent

AD

A94

-503

6b

10

6

70

255

70

60 81

1418

12

1418

12

220

287

13

13

DA

94-5

140a

Dimensions in mm

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76

3.1.22 3NC1 0.. (IEC 60 269-2-1/III, Size 10 x 38 mm) UOrder No. 3NC1 003 3NC1 006 3NC1 008 3NC1 010 3NC1 012 3NC1 016 3NC1 020 3NC1 025 3NC1 032


aR aR aR aR aR aR aR aR aR


VAA2s

A2sK

W

kg

60033

830

1.2–0.01

60064

3030

1.5–0.01

60086

5025

2–0.01

600109

7040

2.5–0.01

6001215

12050

3–0.01

6001625

15060

3.5–0.01

6002034

26080

4.8–0.01

6002560

39090

6–0.01

6003295

600110

7.5–0.01

Table76-35

Fig.76-119


2 4 6x100 x10 1 x10 2 x103

2 4 6 2 4 61 1 1 18 8 8

1x104

64

2

1x103

64

2

1x102

64

2

1x101

64

2

1x100

64

2

1x10-1

64

2

1x10-2

64

2

1x10-3

6A8A

10A12A16A20A25A32A

3NC

10-1

3A

�vs

�p

A

Virt

ual p

re-a

rcin

g tim

e


Fig.76-120


Fig.76-121

Arc voltage

0 100 200 300 400 500 600�

700 800

A

w

3NC

10-2

1

Cor

rect

ion

fact

or

A

0.8

0.6

0.4

0.2

Recovery voltage

0 100 200 300�

�

w

s

1400

1200

1000

800

6003N

C10

-3

400

200

400 500 600 700 800

A

Pea

k ar

c vo

ltage

V

Recovery voltage

Kanch

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77

Fig.77-122


Fig.77-123

2

�

1x10

2

4

6

1

1x102

1x103

1x10 4

2

4

6

2

4

6

2

x101 x10 2 x10 3 x1042 2 4 61 1 1 18 8 84 6 4 6

p

c

3NC

10-4

32A

16A20A25A

12A

8A10A

6A3A

2 4 6 8x1051 2

�

A


Let-

thro

ugh

curr

ent

383N

C10

-5

9.5

A

10.2

Dimensions in mm

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78

3.1.23 3NC1 1.. (Size 10 x 38 mm, Midget Fuse)

Order No. 3NC1 103 3NC1 105


CLASS CC CLASS CC


VAA2s

A2sK

W

kg

6003

50

2.5

0.01

6005

45

2

0.01

Table78-36

Fig.78-124


2

4

6

�

�

vs

p

1x10-1

1x10-2

1x10 0

642 8 1x10 1

642 8 1x10 2

64 82 1x10 3

3A

3NC

11-1

5A

2

4

6

1x10 0

2

4

6

1x10 1

2

4

6

1x102

2

A

Virt

ual p

re-a

rcin

g tim

e

Prospective short-circuit current Kanch

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79

Fig.79-125


Fig.79-126

2

�

1x10

2

4

6

1

1x102

1x103

1x10 4

2

4

6

2

4

6

x101 x10 2 x10 3 x1042 2 4 61 1 1 18 8 84 6 4 6

p

c

3NC

11-4

5A

3A

2 4 6 8x1051 2

�

A


Let-

thro

ugh

curr

ent

3NC

11-

5

6,5

3538

A

9.5

9.5

10.2

Dimensions in mm

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80

3.1.24 3NC1 4.. (IEC 60 269-2-1/III, Size 14 x 51) UOrder No. 3NC1 401 3NC1 402 3NC1 403 3NC1 404 3NC1 405 3NC1 406 3NC1 410




VAA2s

A2sK

W

kg

6601–

–90

5–0.02

6602–

–30

3–0.02

6603–

–40

2.5–0.02

6604–

–50

––0.02

69051.6

1120

1.5–0.02

6906–

–30

1.5–0.02

690103.6

2250

4–0.02

Table80-37

Fig.80-127


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

246

2

46

2

46

2

46

2

46

x100 x10 1 x10 2 x1032 4 6 2 4 61 1 1 18 8 8

�

p

vs

1A2A3A4A5A

10A

3NC

14-1

a

6A

A


Virt

ual p

re-a

rcin

g tim

e

Fig.80-128


Fig.80-129

Arc voltage

0 100 200 300 400 500 600�

700 800

A

w

1

3NC

14-2

a

Cor

rect

ion

fact

or

A

0.8

0.6

0.4

0.2

Recovery voltage

0 100 200 300�

�

w

s

1400

1200

1000

800

600

400

200

400 500 600 700 800

3NC

14-3

A

Pea

k ar

c vo

ltage

Recovery voltage

Kanch

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81

Fig.81-130


Fig.81-131

2

�

1x10

2

4

6

1x10

1x10

1x10

2

4

6

2

4

6

2

x101 x10 2 x10 3 x1042 2 4 61 1 1 18 8 84 6 4 6

p

c

2 4 6 8x1051 2

�

3NC

14-4

a

10A5A

1

2

3

4

A


Let-

thro

ugh

curr

ent

3NC

14-5

10

A

50.8

14.3

Dimensions in mm

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82

3.1.25 3NC1 4.. (IEC 60 269-2-1/III, Size 14 x 51) UOrder No. 3NC1 415 3NC1 420 3NC1 425 3NC1 430 3NC1 432 3NC1 440 3NC1 450




VAA2s

A2sK

W

kg

6901510

2260

5.5–0.02

6902026

6070

6–0.02

6902544

13080

7–0.02

6903058

15080

9–0.02

6903295

80080

7.6–0.02

69040110

980100

8–0.02

69050220

1800110

9–0.02

Table82-38

Fig.82-132


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

246

2

46

2

46

2

46

2

46

x101 x10 2 x10 3 x1042 4 6 2 4 61 1 1 18 8 8

�

p

vs

3NC

14-1

b

25A30A32A40A50A

15A20A

A


Virt

ual p

re-a

rcin

g tim

e

Fig.82-133


Fig.82-134

Arc voltage

0 100 200 300 400 500 600�

700 800

A

w

1

3NC

14-2

b

30A

32ACor

rect

ion

fact

or

A

0.8

0.6

0.4

0.2

Recovery voltage

0 100 200 300�

�

w

s

1400

1200

1000

800

600

400

200

400 500 600 700 800

3NC

14-3

A

Pea

k ar

c vo

ltage

Recovery voltage

Kanch

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83

Fig.83-135


Fig.83-136

2

�

1x10

2

4

6

1x10

1x10

1x10

2

4

6

2

4

6

2

x101 x10 2 x10 3 x1042 2 4 61 1 1 18 8 84 6 4 6

p

c

2 4 6 8x1051 2

�

1

2

3

4

3NC

14-4

b

50A

30A32A40A

25A

15A20A

A


Let-

thro

ugh

curr

ent

3NC

14-5

10

A

50.8

14.3

Dimensions in mm

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84

3.1.26 3NC1 5.. (IEC 60 269-2-1/III, Size 14 x 51) UOrder No. 3NC1 504 3NC1 506 3NC1 516


gG gG gG


VAA2s

A2sK

W

kg

690444

150–

1.0

0.02

690660

200–

1.15

0.02

69016250

85030

2.2

0.02

Table84-39

Fig.84-137


2 4 6

�

1x10

46

-2

1x100

1x103

1x10 5

2

x100 x10 1 x10 2 x1032 4 6 2 4 61 1 1 18 8 8

�

p

vs

3NC

15

1x10-1

2

46

2

1x101

46

2

1x102

46

2

46

2

1x104

46

2

46

2

4A 6A

16A

A


Virt

ual p

re-a

rcin

g tim

e

Fig.84-138


0 100 200 300 400 500 600�

700 800

A

w

3NC

15-2

1

Cor

rect

ion

fact

or

Recovery voltage

A

0.8

0.6

0.4

0.2

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85

Fig.85-139


Fig.85-140

2

�

1x10

2

4

6

3NC

15-1

-1

1x100

1x101

1x10 2

2

4

6

2

4

6

x102 x103 x104 x1052 2 4 61 1 18 8 8

�

4 6 4 6

c

p

8

8

4A6A

16A

A


Let-

thro

ugh

curr

ent


3NC

14-5

10

A

50.8

14.3

Dimensions in mm

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86

3.1.27 3NC2 2.. (IEC 60 269-2-1/III, Size 22 x 58) UOrder No. 3NC2 220 3NC2 225 3NC2 232 3NC2 240 3NC2 250 3NC2 263 3NC2 280 3NC2 200




VAA2s

A2sK

W

kg

6902034

37040

4.6–0.06

6902560

56050

5.6–0.06

6903295

85065

7–0.06

69040185

135080

8.5–0.06

69050155

112090

9.5–0.06

69063310

2700100

11–0.06

69080620

5100110

13.5–0.06

6001001250

10000110

16–0.06

Table86-40

Fig.86-141


2 4 6x101 x10 2 x10 3 x104

2 4 6 2 4 61 1 1 18 8 8

1x104

64

2

1x103

64

2

1x102

64

2

1x101

64

2

1x100

64

2

1x10-1

64

2

1x10-2

64

2

1x10-3

�vs

�

3NC

22-1

20A25A32A40A

100A80A63A50A

p

A

Virt

ual p

re-a

rcin

g tim

e


Fig.86-142


Fig.86-143

Arc voltage

0 100 200 300 400 500 600�

700 800

A

w

3NC

22-2

1

Cor

rect

ion

fact

or

A

0.8

0.6

0.4

0.2

Recovery voltage

0 100 200 300�

�

w

s

1400

1200

1000

800

6003N

C22

-3

400

200

400 500 600 700 800

A

Pea

k ar

c vo

ltage

Recovery voltage

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87

Fig.87-144


Fig.87-145

21x10

2

4

6

2

1x103

1x104

2

4

6

x102 x10 3 x10 4 x1052 2 4 61 1 1 18 8 84 6 4 6

p

c

2

�

3NC

22-4

100A

50A63A80A

40A

25A32A

20A

�

A


Let-

thro

ugh

curr

ent

3NC

22-5

1658

A

22.2

Dimensions in mm

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88

3.2 SITOR fuse links for special applications

3.2.1 3NE3 5..-5, 3NE4 1..-5

Order No. 3NE4 117-5 3NE4 121-5 3NE4 146-5 3NE3 525-5 1) 3NE3 535-5 1)


gR aR aR aR aR


VAA2s

A2sK

W

kg

100050135

110095

200.850.28

1000100900

7400135

350.850.28

8001707370

60500142

430.850.28

1000200 2)

7150

4400075

500.850.7

1000450 2)

64500

395000130

900.850.7

Table88-41

1) Maximum tightening torque M 10 blind tapping: 35 Nm, screw-in penetration depth ≥ 9mm2) Cooling air velocity 0.5 m/s. For natural air cooling, reduced by 5%

Fig.88-146


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x10 0

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x101 x10 2 x10 3 x1042 4 6 2 4 61 1 1 18 8 8

�vs

p

100A 200A

50A 170A 450A

Virt

ual p

re-a

rcin

g tim

e


AD

A94-5

115b

Fig.88-147


Fig.88-148

Arc voltage

0 200 400 600�

1

800 1000

50, 100A

200, 450A

A

w

170A

Cor

rect

ion

fact

or

0.2

0.4

0.6

0.8

AD

A94

-503

7b

Recovery voltage

0 200 400 600�

800 1000 1200

400

800

1200

1600

2000�

1400

1000

600

200

0

1800

< 170A

> 200A

s

w

Pea

k ar

c vo

ltage

Recovery voltage

AD

A94

-511

6b

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89

3NE3 5..-5 3NE4 1..-5

Fig.89-149


Fig.89-150

Fig.89-151

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x103 x104 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

450A

50A

100A200A

170A

c

p


Let-

thro

ugh

curr

ent ��


AD

A94

-511

7b

�

7755

15

60

73

60

M10

20

10.5

82.5

AD

A94

-514

1a

Dimensions in mm

66

47

52

53

3010

54

57

62

26

40

10.4

AD

A94

-514

2a


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90

3.2.2 3NE4 3..-6B, 3NE4 337-6

Order No. 3NE4 327-6B 1) 3NE4 330-6B 1) 3NE4 333-6B 1) 3NE4 334-6B 1) 3NE4 337-6 1)


aR aR aR aR aR


VAA2s

A2sK

W

kg

8002503600

29700175

1050.850.65

8003157400

60700170

1200.850.65

80045029400

191000190

1400.850.65

80050042500

276000195

1550.850.65

800710142000

923000170

1550.950.65

Table90-42

1) Maximum tightening torque M 10 blind tapping: 35 Nm, screw-in penetration depth ≥ 9 mm

Fig.90-152


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x102 x10 3 x10 4 x1052 4 6 2 4 61 1 1 18 8 8

250A

�

315A

450A

500A

710A

vs

p

Virt

ual p

re-a

rcin

g tim

e


AD

A94-5

102b

Fig.90-153


Fig.90-154

Arc voltage

0 100 200 300 400 500 600�

1

700 800

450A

315A

A

w

Cor

rect

ion

fact

or 0.8

0.6

0.4

0.2

AD

A94

-503

8b

Recovery voltage

0 200 400 600�

800 1000 1200

400

800

1200

1600

2000�

1400

1000

600

200

0

1800

s

w

Pea

k ar

c vo

ltage

Recovery voltage

AD

A94

-510

3bKanch

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91

Fig.91-155


Fig.91-156

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x103 x104 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

500A

250A

710A

315A

450A

c

p


Let-

thro

ugh

curr

ent �


AD

A94

-510

4b

DA

94-5

165a

60

M10

�20

6060 7677

15

Dimensions in mm

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92

3.2.3 3NC5 531, 3NC5 8..

Order No. 3NC5 531 1) 3NC5 841 1) 3NC5 840 1) 3NC5 838 1)


aR aR aR aR


VAA2s

A2sK

W

kg

800350 2)

66000

260000200

800.90.67

800630 2)

185000

888000110

1450.91.2

1000600 2)

185000

888000110

1500.91.4

1000800 2)

360000

1728000130

1700.91.2

Table92-43

1) Maximum tightening torque: - M 10 thread (with indicator): 40 Nm- M 10 blind tapping: 50 Nm, screw-in penetration depth ≥ 9 mm- M 24 x 1.5 thread: 60 Nm

2) Temperature of the water-cooled busbar, max. +45 °C

Fig.92-157


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x10 0

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x102 x10 3 x10 4 x1052 4 6 2 4 61 1 1 18 8 8

�vs

p

600A

630A 800A

350A

Virt

ual p

re-a

rcin

g tim

e

Prospective short-circuit current � �

AD

A94-5

118b

Fig.92-158


Fig.92-159

Arc voltage

0 200 400 600�

1

800 1000

A

w

630A600, 800A

350AC

orre

ctio

n fa

ctor 0.8

0.6

0.4

0.2

AD

A94

-503

9b

Recovery voltage

0 200 400 600�

800 1000 1200

400

800

1200

1600

2000�

1400

1000

600

200

0

1800

600A800A

350A630A

s

w

Pea

k ar

c vo

ltage

Recovery voltage

AD

A94

-511

9bKanch

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93

3NC5 531 3NC5 8..

Fig.93-160


Fig.93-161

Fig.93-162

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x103 x104 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

600A

800A630A

c

p

350A


Let-t

hrou

gh c

urre

nt

�


AD

A94

-512

0b

3NC

5531

50

M10

M10

2850

SW4191

9

A24.50.3

Dimensions in mm

DA

94-5

162a

73

M10

�40

M24

�

M10

SW41 ba c

11

Dimensions in mm

Order No. a b c

3NC5 8413NC5 8403NC5 838

98119

98

88.5109.5

88.5

2520.525

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94

3.2.4 3NE6 4.., 3NE9 450, 3NE6 437-7, 3NE9 440-6, 3NE9 450-7

Order No. 3NE9 440-6 3NE9 450 3NE6 437 3NE6 444 3NE9 450-7 3NE6 437-7


gR aR aR aR aR aR

Rated voltage VnRated current In 1)

Pre-arcing I2t value I2ts (tvs = 1 ms)Clearing I2t value I2tA at VnTemperature rise at In (center of the fuse body)Power dissipation at InCyclic load factor WLWeight, approx.

VAA2s

A2sK

W

kg

600850400000

248000074

851.01.0

6001250 2)

400000

248000080

2100.91.0

900710 2)

100000

62000080

1500.91.0

900900 2)

400000

192000080

1700.91.1

6001250 3)

400000

2480000105

2100.91.0

900710 3)

100000

620000110

1500.91.0

Table94-44

1) Maximum tightening torque M 10 blind tapping: 35 Nm, screw-in penetration depth ≥ 9 mm2) Cooling air velocity ≥ 2 m/s3) Lower (cooled) connection, max. +60 °C, upper connection (M 10) max. +110 °C

Fig.94-163


4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x10 3 x10 42 4 6 2 41 18 8

850A

�

710A

vs

p

Virt

ual p

re-a

rcin

g tim

e


AD

A94

-504

0c

4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x100

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x10 3 x10 42 4 6 2 41 18 8

�

1250A

900A

vs

p

Virt

ual p

re-a

rcin

g tim

e


AD

A94

-504

1b

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95

3NE6 4.., 3NE9 4.., 3NE9 4..-6 3NE6 4..-7, 3NE9 4..-7

Fig.95-164


Fig.95-165

Let-through characteristics (current limiting at 50 Hz) Fig.95-166

Arc voltage

Fig.95-167

Fig.95-168

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x103 x104 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

c

p

850A900A

1250A

710A


Let-

thro

ugh

curr

ent �


AD

A94

-512

2b

0 200 400 600�

1

800 1000

710A

900A

850, 1250A

A

w

Cor

rect

ion

fact

or 0.8

0.6

0.4

0.2

AD

A94

-504

2b

Recovery voltage

0 200 400 600�

800 1000 1200

400

800

1200

1600

2000�

1400

1000

600

200

0

1800

710A900A

850A1250A

s

w

Pea

k ar

c vo

ltage

Recovery voltage

AD

A94

-512

1b

10

70

M10

�28

70 b

a

10

81.5 AD

A94

-516

3a

Dimensions in mm

Order No. a b

3NE9 440-63NE9 4503NE6 4373NE6 444

89898999

76767686

Dimensions in mm

70

M10

�28

70

100

125

�

83

10

11

10

81.5 AD

A94

-516

4a

75.5

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96

3.2.5 3NC7 3..-2

Order No. 3NC7 327-2 3NC7 331-2


aR aR


VAA2s

A2sK

W

kg

680250244000

63500045

250.90.7

680350550000

143000066

320.90.7

Table96-45

Fig.96-169


2 4 6

�

1x10

2

46

-3

1x10-2

1x10-1

1x10 0

1x10 1

1x102

1x10

1x10 4

3

2

46

2

46

2

46

2

46

2

46

2

46

x102 x10 3 x10 4 x1052 4 6 2 4 61 1 1 18 8 8

�

250A

350A

vs

p

Virt

ual p

re-a

rcin

g tim

e


AD

A94-5

123b

Fig.96-170


Fig.96-171

Arc voltage

0 100 200 300 400 500 600�

1

700 800

A

w

Cor

rect

ion

fact

or 0.8

0.6

0.4

0.2

AD

A94

-504

3b

Recovery voltage

0 200 400 600�

800 1000 1200

400

800

1200

1600

2000�

1400

1000

600

200

0

1800

s

w

Pea

k ar

c vo

ltage

AD

A94

-512

4b

Recovery voltage

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97

Fig.97-172


Fig.97-173

2

�

1x10

2

4

6

2

1x103

1x104

1x10 5

2

4

6

2

4

6

2

x102 x103 x104 x1052 2 4 61 1 1 18 8 8

�

4 6 4 6

250A

350A

c

p


Let-

thro

ugh

curr

ent �

Prospective short-circuit current� �

AD

A94

-512

5b

12,5

57

68

119

57

30

7 79

12.5

10.5

10.5

AD

A94

-514

3a

Dimensions in mm

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98

Dimension DrawingsAccessories

Fig.98-174

Fuse base 3NH3 030 Fig.98-175


Fuse base 3NH3 230

Fig.98-177



Fuse base 3NH4 030

M8

DA

94-5

152

(M6)

3424

A

25.5

101.

512

1.5

61.8

94.1

56.5

7.5

23.2

Dimensions in mm

150

173

31

2520

39

24

94

40M8

14

DA

94-5

046a

32.6

74.5

8.3

7.5

62.8 A

Dimensions in mm

11

80D

A94

-515

3a

(M8)

155

M1035

85 A

25.7

176.

520

1.5

30.7

35.248.8

Dimensions in mm

11

80D

A94

-515

4a

(M8)

155

M1035

90 A

25.7

201.

522

6.5

30.7

35.248.8

Dimensions in mm

11

80D

A95

-515

5a

(M8)

155

M1235

101 A

25.7

211.

524

1.5

35.2

30.7

48.8Dimensions in mm

DA

94-5

150a

(M6)

M8

24

6286

70102

A13

8.5

23.233.5

94.1

56.5

25.5

101.

512

1.5

7.5

Dimensions in mm

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99

Fig.99-180


Fuse puller 3NX1 011

Fig.99-182

Fuse base 3NC1 038-1 Fig.99-183

Fuse base 3NC1 038-2 Fig.99-184

Fuse base 3NC1 038-3

25

M10

35

85

80

DA94-5151a

(M8)

203

A

10.6

176.

520

1.5

35.255.3

107.3163.1

110.6

Dimensions in mm

66

DA

94-5

156a

136

9326

Dimensions in mm

76

3NC

1038

-1

3120

Dimensions in mm

76

3NC

1038

-2

3140 20

Dimensions in mm

76

3NC

1038

-3

3160

2020

Dimensions in mm

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100

Fig.100-185

Fuse base 3NC1 451-1 Phase barrier for 3NC1451-1

24

3NC

1451

-1

90

88

50

103.5

50.5

A

Dimensions in mm

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101

Fig.101-186

Fuse base 3NC2258-1 Phase barrier for 3NC2258-1

3NC

2258

-1

3366

.2

A

66.5

126.5110.8

Dimensions in mm

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102

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103

Technical Descriptionand Terminology

Technical InformationRated voltage Vn

Rated current In, load capacity

I2t values


Actual pre-arcing time

Taking into account the pre-loading, residual value RW

Let-through current Ic

Rated interrupting capacity

Arc voltage Ûs

Power dissipation, temperature rise

Connecting fuse links in parallel and series

DC current applications

Indicators

Accessories

Determining the Rated CurrentDetermining the rated current In for ageing-free operation with cyclic loads

Selection examples

Fuse Monitoring

Terminology

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Technical Information

Fuse links are selected according to the rated voltage, rated current, clear-

ing I2t value I2tA and the cyclic load factor taking into account the other

conditions specified in Section 4 ’Technical Description and Terminology’.

Unless otherwise noted, all of the following data and information refer to

AC operation at frequencies of between 45 and 62 Hz.

4.1 Rated voltage Vn

The rated voltage of a SITOR fuse link is the RMS value of an AC voltage which is specified in the Ordering and Engineer-ing Data, and the Characteristic Values as well as on the fuse link itself.

The rated voltage of a fuse link should be selected so that it reliably clears the voltage which is driving the short-circuit current. The driving voltage may not ex-ceed a value of Vn + 10 %. It should be noted that the supply voltage Vv0 of a converter can increase by 10 %. If two branches of a converter circuit are in series in the short-circuit path, then for an adequately high short-circuit current it can be assumed that the voltage is evenly distributed. In this case it is imperative that the information and in-structions in Section 4.11.2 ’Fuse links in series’ is carefully observed.

4.1.1 Rectifier operation

For converters which only operate in the rectifier mode, the connection voltage Vv0 is the driving voltage.

4.1.2 Inverter operation

For converters which also operate in the inverter mode, inverter commutation faults can occur when a fault develops. In this case, the driving voltage VWK in the short-circuit is the sum of the sup-plying DC voltage (e.g. EMF of the DC motor) and the connection voltage on the three-phase side. In order to dimen-sion the fuse link, this sum can be replaced by an AC voltage whose RMS value corresponds to 180% of the con-nection voltage on the three-phase side (VWK = 1.8 Vv0). The fuse links must be dimensioned so that they reliably clear voltage VWK.

4.2 Rated current In, load capacity

The rated current of a SITOR fuse link is the RMS value of an AC current for a fre-quency range of between 45 and 62 Hz specified in Sections 2 and 3 ’Ordering and Engineering Data’ and ’Characteris-tics and Dimension Drawings’ as well as the current specified on the fuse link itself.

When fuse links are used with the rated current, the standard operating condi-tions are as follows:

• Natural air cooling with an ambient temperature of +45 °C

• Connection cross-sections the same as the test cross-sections (refer to Sec-tion 4.2.1), when used in l.v.h.b.c. fuse bases and switch disconnectors, refer to Section 2 'Ordering and Engi-neering Data'

• Current conduction angle of half a period 120 °el

• Continuous maximum load with the rated current

For operating conditions which deviate from these, the permissible load current In' of the SITOR fuse link is determined using the following formula

In’ = ku x kq x kλ x kl x WL x In

with

In... rated current of the fuse link 1)

ku... correction factor, ambient temper-ature (Section 4.2.2)

kq... correction factor, connection cross-section (Section 4.2.3)

kλ... correction factor, current conduc-tion angle (Section 4.2.4)

kl... correction factor, forced air cooling (Section 4.2.5)

WL...cyclic load factor (Section 4.2.6)

1) When using SITOR fuse links in l.v.h.b.c. fuse bases according to IEC/EN 60269-2-1 as well as in fused switch disconnectors and switch disconnectors with fuses, the information in Section 2 'Ordering and Engineering Data' must also be observed.

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4.2.1 Test cross-sections

Rated current In

A

Test cross-section(series 3NC10, 3NC11, 3NC14, 3NC15, 3NC22, 3NE1..., 3NE8 0.., 3NE41)

Cu mm2

Test cross-section(all of the remaining series)

Cu mm2

10 1.0 –

16 1.5 –

20 2.5 45

25 4 45

35 6 45

40 10 45

50 10 45

63 16 45

80 25 45

100 35 60

125 50 80

160 70 100

200 95 125

224 – 150

250 120 185

315 2 x 70 240

350 2 x 95 260

400 2 x 95 320

450 2 x 120 320

500 2 x 120 400

560 2 x 150 400

630 2 x 185 480

710 2 x (40 x 5) 560

800 2 x (50 x 5) 560

900 2 x (80 x 4) 720

1000 – 720

1250 – 960

Table105-46

Test cross-sections of SITOR fuse links

4.2.2 Correction factor, ambient temperature ku

The influence of the ambient tempera-ture on the permissible load placed on the SITOR fuse link is taken into account using correction factor ku corresponding to the following diagram.

4.2.3 Correction factor, connection cross-section kq

The rated current of SITOR fuse links is valid for use with connection cross-sec-tions which correspond to the particular test cross-section (refer to Section 4.2.1).

For reduced connection cross-sections, correction factor kq, as shown in the following diagram, should be applied.

Fig.105-187

Correction factor, ambient temperature

Fig.105-188

Correction factor, connection cross-section

–40 –20 0 +20 +40 +60 +80� �

u

Ambient temperature

Cor

rect

ion

fact

or

0.8

0.9

1.0

1.1

1.2

AD

A94

-505

4

�

q

100 80 60 50 40 30 20 15 10

�

�

Connection cross-section(as a % of the test cross-section)

Cor

rect

ion

fact

or

1.00

0.95

0.90

0.85

0.80

0.75

0.70

0.65 AD

A94

-505

7

a) Cross-section reduction of one connectionb) Cross-section reduction of both connections

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4.2.4 Correction factor, current conduction angle kλ

The rated current of SITOR fuse links is based on a sinusoidal AC current (45 Hz to 62 Hz). In converter operation, the fuses in the branch have to conduct an intermittent current whereby the cur-rent conduction angle in most cases is either 180 °el or 120 °el. When the load current has this waveform, the fuse link can still conduct the full rated current. The current must be reduced corre-sponding to the following diagram for lower current conduction angles.

4.2.5 Correction factor for increased air cooling kl

With increased air cooling, the load capacity of the fuse links increases with the air velocity; air velocities > 5 m/s significantly increases the load capacity.

Fig.106-189

Correction factor, valve conducting period

Fig.106-190

Correction factor for increased air cooling

30 45 60 90 120 180 240

�

360

Valve conducting period

Cor

rect

ion

fact

or

0.5

0.6

0.7

0.8

0.9

1.0

1.1

AD

A94

-505

5b

0 2 4

� � �

l

6

Air velocity

Cor

rect

ion

fact

or

1.0

1.1

1.2

1.4

1.3

AD

A94

-505

6b

4.2.6 Cyclic load factor WL

The cyclic load factor WL is a reduction factor which can be used to determine the ageing-free load capacity of a fuse link for any load duty cycle. SITOR fuse links have different cyclic load factors as a result of the mechanical design. The particular cyclic load factor WL for >10000 load cycles (1 hour "on", 1 hour

"off") during the expected operating time of the fuse links is specified in Sec-tion 3 'Characteristics and Dimension Drawings'. For a lower number of load cycles during the expected operating time of the fuse links, then according to the following diagram, a fuse link with a lower cyclic factor WL is adequate.

For a uniform load (no load duty cycles and no interrupt operations), then a cy-clic load factor WL = 1 can be assumed. For load duty cycles as well as interrupt operations, which last longer than 5 min., and which occur more frequently than 1 x per week, then the cyclic load factor WL specified for the individual fuse links in Section 3 'Characteristics and Dimension Drawings' should be selected.

Fig.106-191

Cyclic load factor WL characteristic for load cycles

101 2 5 102 2 5 103 2 5 104 2 5 105

� ��/

LAn

Permissible number of load cycles

0.6

0.7

0.8

1.1

0.9

1.0 1.0

0.95

0.9

0.85

0.8

AD

A94

-505

8b

ILa...Load current of the linkIn... Rated current of the fuse link

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4.2.7 Fuse currents when used in a converter

The RMS value of the fuse current for the most usual converter circuit config-urations can be calculated from the

(smoothed) DC current Id and from the phase current IL according to the following table.

Converter circuit configuration RMS value of the phase current(phase fuse)

RMS value of the branch current(branch fuse)

Single-pulse center-tap circuit2-pulse center-tap circuit3-pulse center-tap circuit6-pulse center-tap circuitDouble 3-pulse center-tap circuit(parallel)

(M1)(M2)(M3)(M6)(M3.2)

1.57 Id0.71 Id0.58 Id0.41 Id0.29 Id

–––––

2-pulse bridge circuit6-pulse bridge circuit

(B2)(B6)

1.0 Id0.82 Id

0.71 Id0.58 Id

Single-phase bi-directional circuit (W1) 1.0 IL 0.71 IL

Table107-47

Fuse currents when used in a converter

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4.3 I2t values

When a short-circuit develops, the current through the fuse link increases, during the pre-arcing time ts up to the let-through current Ic (peak melting current).

During the arc time tL the arc forms and the short-circuit current is cleared (refer to the following diagram).

The integral of the square of the current over the complete clearing time (ts+tL) – also known as the clearing I2t value, defines the heat which the semiconduc-tor component is subject to, which is to be protected, during the interrupt operation.

In order to provide adequate protection, the clearing I 2t value of the fuse link must be less than the I 2t value of the semiconductor component. The clear-ing I2t value of the fuse link practically decreases the same as the I 2t value of a semiconductor component with in-creasing temperature, i.e. increasing pre-loading. This means that it is suffi-cient to compare the I 2t values in the non-loaded (cold) condition.

The clearing I2t value (I2tA) is the sum of the pre-arcing I2t value (I2ts) and the arcing I2t value (I2tL).

(semiconductor, tvj = 25°C, tp = 10 ms) > (fuse link)

4.3.1 Pre-arcing I2t value I2ts

The pre-arcing I2t value can be calculat-ed for any time from the value pairs of the time/current characteristic of the fuse link.

For decreasing pre-arcing times, the pre-arcing I2t value goes to a lower limit value where, during melting, almost no heat is dissipated from the notches of the fuse element to the environment. The pre-arcing I2t values, specified in Sections 2 and 3 of the ’Ordering and Engineering Data’ und ’Characteristics and Dimension Drawing’ correspond to the pre-arcing time of tvs = 1 ms.

4.3.2 Arcing I2t value I2tL

While the pre-arcing I2t value is a char-acteristic of the fuse link, the arcing I2t value depends on the circuit data, and more precisely

• on the recovery voltage Vw

• on the power factor cos ϕ of the short-circuit loop

• on the prospective current Ip (current at the location where the fuse link is mounted if this is bypassed)

The maximum of the arcing I2t value is reached, depending on the fuse type, at a current of between 10 In up to 30 In.

4.3.3 Clearing I2t value I2tA, correction factor kA

The clearing I2t values of the fuse links are specified in Section 3 ’Characteris-tics and Dimension Drawings’ for rated voltage Vn. The correction factor kA should be taken into account when determining the clearing-I2t value for a recovery voltage Vw.

I2tA (for Vw) = I2tA (for Vn) x kA

The "Correction factor kA" characteristic (refer to the following diagram) is spec-ified for the individual fuse series in Section 3 ’Characteristics and Dimen-sion Drawing’. The clearing I2t values, determined in this fashion, are valid for prospective currents Ip ≥ 10 x ln and cos ϕ = 0.35.

4.3.4 Taking into account the recovery voltage Vw

The recovery voltage Vw is obtained from the voltage which drives the short-circuit current. The driving volt-age is, in most fault situations, the same as the supply voltage Vv0. For inverter commutation faults, it is 180% of the supply voltage Vv0 (refer to Section 4.1 ’Rated voltage’). If two branches of a converter circuit are located in the short-circuit loop, and there are there-fore two fuse links in series, when the short-circuit current is sufficiently high (refer to Section 4.11.2), then it can be assumed that the voltage will be evenly distributed. This means Vw = 0.5 Vv0 or, for inverter commutation faults, Vw = 0.9 Vv0.

Fig.108-192

Current characteristic when a fuse ruptures

c

s

A

L

DA

94-5

059

i

I2 td∫( )

I2 td∫( )I2tA∫( )

Fig.108-193


100 200 300 400 500 600�

1

700

A

wRecovery voltage

Cor

rect

ion

fact

or

0.2

0.4

0.6

0.8

AD

A94

-506

0b

Example: Series 3NE8 0...

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4.3.5 Influence of the power factor cos ϕ

The data provided in Section 3 ’Charac-teristics and Dimension Drawings’ for the clearing I2t values (I2tA) refers to a power factor of cos ϕ = 0.35 (exception: For SITOR fuse links 3NC5 8.., 3NE6 4.., 3NE9 4.. , then cos ϕ = 0.2 applies).

The following diagram shows the relationship between the clearing I 2t values and the power factor cos ϕ at 1.0 Vn and at 0.5 Vn.

4.4 Time/current characteristics

In the following diagram the time/cur-rent characteristics shown indicate the time up to melting for the unloaded fuse link from the cold state (max. +45 °C).

If the time/current characteristic is shown as dotted line in the long time range (tvs > 30 s) (fuse links, utilization Category aR), then this represents the limit of the permissible overload from the cold condition. If the dotted section of the characteristic is exceeded, there is a danger that the ceramic body of the fuse link could be damaged. The fuse link can only be used as short-circuit protection. In this case an additional protective device (overload relay, circuit-breaker) is required to provide overload protection. For closed-loop controlled converter units the closed-loop current limiting control is sufficient.

If the time/current characteristic is a solid line over the complete time range (fuse links, utilization Category gR or gS), then the fuse link can interrupt the current over the complete time range. This means that it can be used for overload and short-circuit protection.

4.5 Actual pre-arcing time

The virtual pre-arcing time tvs is speci-fied in the time/current characteristic as a function of the prospective current. This is a value which is valid for a squarewave current (di/dt) = ∞).

For pre-arcing times tvs < 20 ms, the vir-tual pre-arcing time tvs deviates from the actual pre-arcing time ts. The actual pre-arcing time can (depending on the current rate-of-rise) be several milli-seconds longer.

In the range of several milliseconds, over which time the increase of the short-circuit current can be considered to be linear, for a sinusoidal current increase and at 50 Hz, the actual pre-arcing time is given by:

Fig.109-194

Clearing I2t value I2tA for SITOR fuse links as a function of power factor cos ϕ

060

100

120�

80a

b

0.2 0.4 0.6 0.8

Power factor cosCle

anin

g- �

val

ue��

a

t cos

(as

a %

of

at

cos

=

0.3

5 or

0.2

)

22

A2

A

AD

A94

-506

1b

for 1.0 Unfor 0.5 Un

a) for SITOR fuse links 3NC5 8..., 3NE6 4..., 3NE9 4.. (reference to cos ϕ = 0,2)

b) for all other SITOR fuse links (reference to cos ϕ = 0,35)

Fig.109-195

Time/current characteristics of fuse links

2 4 6

�

1x10

vs

-3

1x10-2

1x10-1

1x100

1x101

1x102

1x103

x10 1 x10 2 x10 3 x10 42 4 6 2 4 61 1 1 18 8 8

p

� 1x104

35A 160A


Virt

ual p

re-a

rcin

g tim

e

AD

A94

-507

8b

35 A: Utilization Category gR160 A: Utilization Category aR

ts

3xI2

ts

Ic2

-----------------=

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4.6 Taking into account the pre-loading condition, residual value factor RW

A pre-loading condition of the fuse link reduces the permissible overload duration and the pre-arcing time.

The residual value factor RW can be used to determine the time for which a fuse link can be operated, ageing-free at any overload current ILa during a peri-odic or non-periodic load duty cycle above the previously determined per-missible load current In’.

The residual value factor RW depends on the pre-loading condition V (Irms RMS fuse current during the load duty cycle to the permissible load current In’)

as well as the frequency of the overload conditions (refer to the following dia-gram, characteristics a and b).

Permissible overload duration = residual value factor RW x pre-arcing time tvs (time/current characteristic)

The reduction of the pre-arcing time of a fuse link for a specific pre-load condi-tion can be taken from characteristic c.

Pre-arcing time = residual value factor RW x pre-arcing time tvs (time/current characteristic)

VIrms

In′----------=

Fig.110-196

Permissible overload and pre-arcing time for a pre-loading condition

0

1

0 1

c

b

a

DA

94-5

062b

0.9

Pre-load factor0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

Res

t val

ue fa

ctor

AD

A94

-506

2b

a) Frequent impulse/load duty cycle currents (> 1/week)b) Seldom impulse/load duty cycle currents (< 1/week)c) Pre-arcing time for pre-loading

4.7 Let-through current Ic

The let-through current Ic can be deter-mined from the let-through characteris-tics (current limiting at 50 Hz) specified for the particular fuse link in Section 3 ’Characteristics and Dimension Draw-ings’. The let-through current is depen-dent on the prospective current and the DC current element when the short-cir-cuit actually occurs (instant of switch-on).

The let-through current Ic of a fuse link as a function of the prospective short-circuit current Ip is shown in the following diagram using as an example a SITOR fuse link 3NE4 333-0B.

Fig.110-197

Let-through current Ic of a fuse link

2

�

c

x102 x103 x104 x1052 2 4 61 1 1 1

�

4 6 4 6

1x105

1x104

1x103

1x102

450A

DA

94-5

079b



Let-

thro

ugh

curr

ent

A

p

Example: SITOR fuse link 3NE4 333-0B

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4.8 Rated interrupting capacity

The rated interrupting capacity of all SITOR fuse links is at least 50 kA if higher values are not specified in Section 3 ’Characteristics and Dimen-sion Drawings’. The data is valid for a test voltage of 1.1 x Vn, 45 to 62 Hz and 0.1 ≤ cos ϕ ≤ 0.2. For application voltag-es which lie below the rated voltage as well as for rated currents of the fuse links which lie below the maximum rated current of a fuse series, the inter-rupting capacity lies significantly above the rated interrupting capacity.

4.9 Arc voltage Vs [Ûs]

When extinguishing, an arc voltage Vs [Ûs] occurs at the connections of the fuse link. This arc voltage can signifi-cantly exceed the connection voltage. The magnitude of the arc voltage de-pends on the design of the fuse link and the magnitude of the recovery voltage. It is shown in the form of a characteristic as a function of the recovery voltage Vw (refer to the following diagram).

The arc voltage occurs at the semicon-ductor components, which are not located in the short-circuit loop, as blocking voltage. In order to avoid a voltage-related hazard, the arc voltage may not exceed the peak blocking volt-age of the semiconductor component.

4.10 Power dissipation, temperature rise

When the rated current is reached, the fuse elements of SITOR fuse links have a significantly higher temperature than the fuse elements of cable protection fuse links.

The power dissipation, specified in Section 3 ’Characteristics and Dimen-sion Drawings’ is the upper spread value if the fuse link is conducting the rated current.

The power dissipation decreases at partial load corresponding to the follow-ing diagram.

The temperature rise, specified in Section 3 ’Characteristics and Dimen-sion Drawings’, is valid for the specified reference point and was determined when testing the fuse link (test setup in accordance with DIN VDE 0636, Part 23 and IEC 269-4).

4.11 Connecting fuse links in parallel and series

4.11.1 Parallel circuit

If several semiconductor components and therefore fuse links are connected in parallel in a branch when an internal short-circuit develops, then only the fuse link connected in series with the defective semiconductor component ruptures. This fuse link must extinguish the full connection voltage.

If it is necessary increase the current, two or several fuse links connected in parallel can be assigned to a semicon-ductor component without having to re-duce the current. The resulting clearing-I2t value then increases to the square of the number of fuse links connected in parallel. Only fuse links of the same type should be used in order to avoid that the current is unevenly distributed.

Fig.111-198

Arc voltage

0 200 400 600

�

800 1000 1200

1000

1400

2000

s�

w

200

400

600

800

1200

1600

1800

Recovery voltage

Pea

k ar

c vo

ltage

AD

A94

-506

3b

Example: SITOR fuse link 3NE4 333-0B

Fig.111-199

Power dissipation at partial load

100

80

60

40

20

0

�

0 20 40 60 80 100�

n

Load current(as a % of rated current )

Pow

er d

issi

patio

n at

par

tial l

oad

(as

a %

of t

he p

ower

diss

ipat

ed a

t rat

ed c

urre

nt)

AD

A94

-506

4b

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112

4.11.2 Fuse links in series

There are two types of series circuits:

• Series circuit in the converter branch

• Two fused converter branches con-duct the short-circuit current in series

In both of these cases it can only be assumed that the voltage will be evenly distributed if the pre-arcing time of the SITOR fuse link does not exceed the values specified in the following Table.

The cooling conditions of the fuse links connected in series should be approxi-mately the same. If faults are to be ex-pected where the specified pre-arcing times are exceeded due to the slower in-crease in the current-rate-of-rise, then it can no longer be assumed that the volt-age will be evenly distributed. In this case, the fuse links should be dimen-sioned as far as the voltage is concerned so that one fuse link alone can extin-guish the full connection voltage.

As far as possible a series circuit of fuse links in the branch of a converter circuit should be avoided. Instead, a single fuse link should be used with the corre-spondingly higher rated voltage.

SITORfuse links

Order No.

Maximum pre-arcing time for an even voltage distribution

ms

3NC1 0..3NC1 1..3NC1 4..3NC1 5..3NC2 2..

1010101010

3NC2 4..3NC5 8..3NC7 3..3NC8 4..

40101010

3NE1 0..3NE1 2..3NE1 3..3NE1 4..3NE1 8..

1010102010

3NE3 2..3NE3 3..3NE3 4..3NE3 5..3NE3 6..

1010202020

3NE4 1..3NE4 3..

1010

3NE5 4..3NE5 6..

2020

3NE6 4.. 10

3NE7 4..3NE7 6..

2020

3NE8 0..3NE8 7..

1010

3NE9 4..3NE9 6..

1020

Table112-48

Maximum pre-arcing times for even voltage distribution

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113

4.12 DC current applications

When fuse links are used in DC circuits, in some cases, other data apply than those specified for AC current in Section 3 ’Characteristics and Dimen-sion Drawings’.

4.12.1 Permissible DC voltage

The permissible DC voltage Vperm of the fuse link depends on the rated voltage Vn, the time constant τ = L/R in the DC link and the prospective current Ip. The permissible DC voltage is referred to the rated voltage Vn and is specified as a function of time constant τ and the pro-spective current is a parameter (refer to the following diagram).

Fig.113-200

Permissible DC voltage of a fuse link

0 10 20 30 40 50 60 70 80� �

p n

> 20 �

p n = 10

p n = 5

nperm

Time constant � � � =

1.00

0.90

0.80

0.70

0.60

0.50

0.40 AD

A94

-506

5b

perm

. DC

vol

tage

rate

d vo

ltage

0 10 20 30 40 50 60 70 80� �

p n

> 20 �

p n = 10

p n = 5

Time constant

0.90

0.80

0.70

0.60

0.50

0.40

0.30

perm

. DC

vol

tage

rate

d vo

ltage

perm

n

AD

A94

-506

6b

With the exception of series 3NE1 0.., 3NE1 8..

for the series 3NE1 0.., 3NE1 8..

4.12.2 Clearing I2t value I2tA

The clearing I2t value I2tA depends on the voltage, the time constant τ = L/R and the prospective current Ip. It is cal-culated using the I2tA value at the rated voltage Vn, specified in Section 3 ’Char-acteristics and Dimension Drawings’ for the particular fuse link and correction factor kA. However, instead of the recov-ery voltage Vw, that DC voltage is insert-ed against which the fuse link should switch.

The clearing I2t value thus determined applies under the following prerequi-sites:

• Time constant L/R ≤ 25 ms for Ip ≥ 20 In• Time constant L/R ≤ 10 ms for Ip = 10 In

The clearing I2t values increase by 20 %

• For Ip ≥ 20 In and a time constant L/R = 60 ms

• For Ip = 10 In and a time constant L/R = 35 ms

4.12.3 Arc voltage Ûs

The arc voltage Ûs is determined from the characteristic for the particular fuse link specified in Section 3 ’Characteris-tics and Dimension Drawings’. How-ever, instead of the recovery voltage Vw, that DC voltage is inserted against which the fuse link should switch.

The arc voltage thus determined applies under the following prerequisites:

• Time constant L/R ≤ 20 ms for Ip ≥ 20 In• Time constant L/R ≤ 35 ms for Ip = 10 In

The clearing I2t values increase by 20 %

• For Ip ≥ 20 In and a time constant L/R = 45 ms

• For Ip = 10 In and a time constant L/R = 60 msKan

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4.13 Indicators

An indicator is used to show when the fuse link has ruptured. SITOR fuse links have an indicator whose response voltage lies between 20 V (Vn ≤ 1000 V) and 40 V (Vn > 1000 V).

4.14 Accessories

4.14.1 Fuse bases, fuse pullers

Some of the SITOR fuse links can be used in the appropriate fuse bases. The matching fuse bases (single-phase and three-phase) as well as the associat-ed fuse pullers are listed in the Tables in Section 2.3 'Accessories' and Section 3 ’Characteristics and Dimension Draw-ings’.

NoteEven if the rated voltage and/or current of the fuse bases are lower than that of the associated fuse link, the values of the fuse link apply.

4.14.2 Fused switch disconnec-tors, switch disconnectors with fuses

Certain series of SITOR fuse links are suitable for use in fused switch discon-nectors 3NP4 and 3NP5 (refer to Catalog NS K) and in switch disconnec-tors with fuses 3KL and 3KM (refer to Catalog NS K).

The following points must be carefully observed when fuse links are used in switch disconnectors:

• The power dissipation of SITOR fuse links is higher when compared to l.v.h.b.c. cable protection fuses. This means that the permissible load current of the fuse links must in some cases be reduced (also refer to Section 2.3 ’Accessories’.

• Fuse links with rated currents In > 63 A may then not be used as overload protection, if they correspond to duty Class gR.

NoteAll 3NE1... fuse links with rated currents In from 16 A to 850 A and utilization Categories gR and gS can, on the other hand, be used to provide overload pro-tection.

• The rated voltage and rated insulation voltage of the switch disconnectors must correspond, as a minimum, to the voltage being used.

• When using 3NE3 2.., 3NE3 3.., 3NE4 3.., 3NC2 4.. and 3NC8 4.. fuse links, the switching capacity of fused switch disconnectors may not be fully utilized due to the slotted knife contacts. It is permissible to occasionally switch currents up to the rated current of the fuse links.

• 3NE4 1.. fuse links when used in fused switch disconnectors may only be occasionally actuated and only when in a no-current condition as the fuse contact blades are subject to signifi-cant mechanical stresses.

The individual fuse links are assigned to the various switch disconnectors in Section 2.3 'Accessories'. The permissi-ble load capacity of the fuse link and the required connection cross-section are also specified here.

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Determining the Rated Current

4.15 Determining the rated current In for ageing-free operation with cyclic loads

Frequently, converters are not operated with a continuous load, but with cyclic loads which can also briefly exceed the rated converter current.

The selection techniques for ageing-free operation of SITOR fuse links will now be described for four typical load types.1)

• Continuous load

• Unknown cyclic load, however with a known maximum current

• Cyclic load with known load duty cycle

• Occasional impulse load from a pre-loaded condition with unknown impulse sequence

In this case the diagrams for the correc-tion factors ku, kq, kλ , kl in Section 4.2 ’Rated current In, load capacity’ as well as the residual value factor RW in Section 4.6 ’Taking into account the pre-loaded condition, residual value fac-tor RW’ of the ’Technical data’ should be observed. The cyclic load factor WL is specified for every fuse link in Section 3 ’Characteristics and dimension drawings’.

The required rated current In of the fuse link is determined in two steps:

1. The rated current In is determined us-ing the RMS value Irms of the load cur-rent

Permissible load current In’ of the selected fuse link.


2. The permissible overload duration of the current blocks exceeding the permissible fuse load current In’ is checked.

Pre-arcing time tvs (time/current characteristic) x residual value factor RW ≥ overload duration tk

In this case, the pre-loading factor

and the characteristics 'Permissible overload and pre-arcing time for a pre-loaded condition' (Fig. 110-196, characteristic a) and "Time/current characteristic" for the selected fuse link are required.

If the determined overload duration is less than the associated, specified over-load duration, then a fuse link with a higher rated current In (taking into account the rated voltage Vn and the permissible interrupting I 2t value) should be selected and the check repeated.

4.15.1 Continuous load

1) Please contact us for cyclic loads which cannot be classified in one of the four specified typical load types.

In Irms1

ku kq kλ kl WL××××------------------------------------------------------------------×>

Fig.115-201

Continuous load

VIrms

In′----------=

La

0

LaLo

ad c

urre

nt

AD

A94

-506

7a

Rated current In of the fuse link

ILa... load current of the fuse link(RMS value)

Less than 1 interrupt oper./ week: WL = 1More than 1 interrupt operation per week:WL = refer to characteristic values

In ILa1

ku kq× kλ× kl WL××----------------------------------------------------------×≥

4.15.2 Unknown cyclic load – however with a known maximum current Imax

4.15.3 Cyclic load with known load duty cycle

Fig.115-202

Unknown cyclic load

Fig.115-203

AC load with known load duty cycle

max

0

LaLo

ad c

urre

nt

AD

A94

-506

8a

Rated current In of the fuse link

Imax... Max. load current of the fuse link (RMS value)

In Imax1

ku kq× kλ× kl WL××----------------------------------------------------------×≥

La1

La3

La2

'n

1 2 3 4

La

RMS

Load

cur

rent

AD

A94

-506

9a

ILK... Max. load current of the fuse link (RMS value)

Irms

I2

Laktk

× k 1=

k n=

∑SD

----------------------------------------------=

IrmsI2

La1t1 I2

La2t2 I2

La3t3+ +

SD------------------------------------------------------------------------=

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4.15.4 Occasional impulse load from a pre-loaded condition with unknown impulse sequence

The required rated current In of the fuse link is determined in two steps:

1. The rated current In is determined us-ing the pre-loaded current Ipre.



2. The permissible overload duration of the impulse current Iimpulse

pre-arcing time tvs (time/current characteristic) x residual value factor RW ≥ impulse time timpulse is checked

In this case the pre-loading factor

and the characteristics 'Permissible overload and pre-arcing time for a pre-loaded condition' (Fig. 196, characteristic a) and ’Time/current characteristic’ for the selected fuse link are required.

If the determined overload duration is less than the required overload duration timpulse, then a fuse link with a higher rated current In (taking into account the rated voltage Vn and the permissible clearing I2t value) should be selected and the check repeated.

4.16 Selection examples

For a converter assembly with a circuit configuration (B6) A (B6) C, whose rated DC current Idn = 850 A, fuse links should be selected which are then used as branch fuses. The selected fuse is shown for various operating modes of the converter assembly.

Converter assembly data

• Line supply voltage VN = 3-ph. 400 V AC 50 Hz

• Recovery voltage VW = 360 V = VN x 0.9 (for inverter commutation faults)

• Thyristor T 508N (eupec company), I2t value ∫ i2 dt = 320 x 10 3A2s (10 ms, cold)

• Fuse links, natural air cooling, ambient temperature ϑu = +35 °C

• Connection cross-section for the fuse links, copper: 160 mm2

• Conversion factor DC current Id/fuse load current ILa: ILa = Id x 0.58

For the following examples, for loads, which exceed the rated DC current of the converter assembly, it is assumed that the converter assembly is dimen-sioned for these load conditions.

4.16.1 Continuous, interruption-free load

The following correction factors should be applied:

ku = 1.02 (ϑu = +35 °C)

kq = 0.91 (connection cross-section at both ends, 40 % of the test cross-section)

kλ = 1.0 (valve conducting period λ = 120°)

kl = 1.0 (no forced air cooling)

Required rated current In of the SITOR fuse link:

Fig.116-204

Occasional impulse load

In Ipre1

ku kq kλ kl WL××××----------------------------------------------------------×>

VIrms

In′----------=

'n

0

La

pre

interval

impulse

impulse

Load

cur

rent�

AD

A94

-507

0a

Condition:tinterval ≥ 3 x timpulse tinterval ≥ 5 min

DA

94-5

071

La493 A

DC current Id = Idn = 850 AILa = Id x 0.58 = 493 ASelected:SITOR fuse link 3NE3 335(560 A/1000 V), WL = 1Clearing I 2t value

I 2tA = 360 x 103 x 0.53 = 191 x 103 A2sTest cross-section acc. to Table 10-1: 400 mm2

In ILa1

ku kq× kλ× kl WL××-----------------------------------------------------------× 493 A=≥

11.02 0.91× 1.0× 1.0× 1.0×-------------------------------------------------------------------------------- 531A=

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4.16.2 Unknown cyclic load, however with known maxi-mum current


ku = 1.02 (ϑu = +35 °C)

kq = 0.91 (connection cross-section at both ends, 40 % of the test cross-section))



Required rated current In of the SITOR fuse link:

max

DA

94-5

072

La

= 435 A

Max. DC current Idmax = 750 AMax. fuse current Imax = Idmax x 0.58 = 435 ASelected:SITOR fuse link 3NE3 334-0B(560 A/1000 V), WL = 1Clearing I 2t value

I 2tA = 260 x 103 x 0.53 = 138 x 103 A2sTest cross-section acc. to Table 10-1: 400 mm2

In Imax1

ku kq× kλ× kl WL××-----------------------------------------------------------× 435 A=≥

11.02 0.91× 1.0× 1.0× 1.0×-------------------------------------------------------------------------------- 469 A=

4.16.3 Cyclic loadwith known load duty


ku = 1.02 (ϑu = +35 °C)




1. Required rated current In of the SITOR fuse link:


In’ = ku x kq x kλ x kl x WL x In = 1.02 x 0.94 x 1.0 x 1.0 x 1.0 x 450 = 431 A

2. The permissible overload duration of the current blocks which exceed the permis-sible fuse load current In' is checked

Pre-load factor:

Residual value factor RW:for V = 0.74 from characteristic a (Fig. 196, frequent impulse/load duty cycle currents) RW = 0.2

Current block ILa1: Pre-arcing time tvs: 230 s (from the time/current charac-teristic for 3NE3 333) tvs x RW = 230 s x 0.2 = 46 s > t1

Current block ILa3: Pre-arcing time tvs: 1200 s (from the time/current charac-teristic for 3NE3 333) tvs x RW = 1200 s x 0.2 = 240 s > t3

La1

n

1 2 4

= 330 s

La

= 696 A La3= 580 A

= 317 A

3

La2= 290 A

'

RMS

AD

A94

-507

3a

RMS value of the load current

Selected:SITOR fuse link 3NE3 333(450 A/1000 V), WL = 1Clearing I2t value I2tA = 175 x 103 x 0.53 = 93 x 103 A2sTest cross-section acc. to Table 10-1: 320 mm2

Irms696

220 290

2+× 240 580

210×+×

330------------------------------------------------------------------------------------------------------ 317A= =

DC current: Id1 =1200 A t1 = 20 sId2 = 500 A t2 = 240 sId3 =1000 A t3 = 10 sId4 = 0 A t4 = 60 s

Fuse current:ILa1 =1200 x 0.58 = 696 AILa2 = 500 x 0.58 = 290 AILa3 =1000 x 0.58 = 580 A

In Irms1

ku kq× kλ× kl WL××-----------------------------------------------------------× 317 A=≥

11.02 0.94× 1.0× 1.0× 1.0×-------------------------------------------------------------------------------- 331 A=

VIrms

In′---------- 317

431----------- 0.74= = =

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4.16.4 Occasional impulse load from a pre-loaded condition with known impulse sequence

The following correction factors should be applied::

ku = 1.02 (ϑu = +35 °C)




1. Required rated current In of the SITOR fuse link:

Permissible load current In’ of the selected fuse link:

In’ = ku x kq x kλ x kl x WL x In = 1.02 x 0.91 x 1.0 x 1.0 x 1.0 x 560 = 520 A

2. The permissible overload duration of the current blocks, which exceed the permissible fuse load current Iimpulse is checked

Pre-loading factor :

Residual value factor RW:for V = 0.78 from characteristic a (Fig. 196, frequent impulse/load duty cycle currents) RW = 0.18

Impulse current Iimpulse: Pre-arcing time tvs: 110 s (from the time/current characteristic for 3NE3 333) tvs x RW = 110 s x 0.18 = 19.8 s > timpulse

La

= 406 A

= 1015 A

= 8 s

pre

impulse

impulse

AD

A94

-507

4a

The conditionstinterval ≥ 3 timpulse and tinterval ≥ 5 min are fulfilled.

Selected:SITOR fuse link 3NE3 333(560 A/1000 V), WL = 1Clearing I2t value I2tA = 360 x 103 x 0.53 = 191 x 103 A2sTest cross-section acc. to Table 10-1: 400 mm2

DC current: Idpre = 700 AIdimpulse = 500 A timpulse = 8 s

Fuse current:Ipre = Idpre x 0.58 = 406 AIimpulse = Idimpulse x 0.58 = 1015 A

In Ipre1

ku kq× kλ× kl WL××-----------------------------------------------------------× 406 A=≥

11.02 0.91× 1.0× 1.0× 1.0×-------------------------------------------------------------------------------- 437 A=

VIpre

In′--------- 406

520----------- 0.78= = =

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Fuse Monitoring

The following fuse monitoring devices represent a low-ohmic bypass

(circuit-breaker). These monitoring devices are intended for

semiconductor protection fuse links which are only used to protect

semiconductor components as either phase or branch fuses and are not

intended to be used to bring the converter into a no-voltage condition.

3NP4 and 3NP5 fuse switch disconnec-tors are available with integrated 3RV.. circuit-breakers (up to 690 V) or with electronic fuse monitoring (up to 500 V).

For more detailed information, refer to Catalog NS K Section 12.

According to DIN VDE 0100, monitoring devices for fuse links which are also in-tended to simultaneously disconnect the voltage, may only be used if the monitoring circuit is positively discon-nected together with the main circuit. When monitoring cable protection fuse links, fused switch disconnectors with mounted circuit-breaker are used as listed in Catalog NS K.

4.17 Circuit-breakers

4.17.1 Applications

3RV1611 circuit-breakers (refer to Cata-log NS K) are used to monitor phase fuses for connection voltages up to 690 V.

A circuit-breaker is not suitable to moni-tor fuses of converters where inverter commutation faults can occur or for those converters where, when a fault occurs, DC voltages >250 V/pole can be fed back into the line supply.

In the DC circuit of a converter, fuse links cannot be monitored using 3RV1611 circuit-breakers.

4.17.2 Mode of operation

Each of the phase fuses to be moni-tored is connected in parallel to a cir-cuit-breaker path (refer to the following diagram). When the fuse link ruptures, the circuit-breaker trips and signals that the fuse has ruptured.

Fig.119-205

Monitoring phase fuses using 3RV1611 circuit-breaker

DA

94-5

077b

L1 L2 L3

1 211353

2 4 6 14 22

AConverter

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Terminology

This glossary explains the most important terms when using fuse links to

protect semiconductor components.

Additional definitions are included in DIN VDE 0636, Part 1 and Part 10.

Rated interrupting capacity

The rated interrupting capacity specifies the highest prospective short-circuit current Ip which a fuse link can interrupt at 1.1x rated voltage and under speci-fied conditions.

Rated frequency

The rated frequency is the frequency for which the fuse link is designed regard-ing the power dissipation, current, voltage, characteristics and interrupting capacity.

Rated voltage Vn

The rated voltage is the voltage stamped on the fuse and which is de-fined according to the test conditions and the operating voltage limits.

For SITOR fuse links, the rated voltage is always an RMS AC voltage.

Rated current In

The rated current of a fuse link is the current which is stamped on the fuse link and which the fuse can conduct under the specified conditions (refer to Section ’Technical information’) without having a negative impact on the func-tion of the fuse.

Utilization Category

The utilization Category is a designation of the Function Class of a fuse link in conjunction with the element to be pro-tected.

• Utilization Category gS: Full range semiconductor protection fuse for use in fused switchgear and switching devices

• Utilization Category gR: Full range semiconductor protection

• Utilization Category aR: Partial range semiconductor protec-tion

Let-through current Ic

The let-through current Ic is the highest instantaneous current value which is reached when a fuse ruptures.

Let-through current characteristic

The let-through current characteristic specifies the let-through current at 50 Hz as a function of the prospective current.

Function Class

The function class designates the capability of a fuse link to conduct spe-cific currents without damage and to interrupt overcurrents within a specific range (range of the interrupting capacity).

Function Class a

Partial range fuses:Fuse links which conduct currents up to at least their rated current and can inter-rupt currents above a certain multiple of their rated current up to the rated inter-rupting capacity.

Function Class g

Full range fuses:Fuse links which can continually con-duct currents up to at least their rated current and can interrupt currents from the smallest pre-arcing current up to the rated interrupting capacity.Kan

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I2t value

The I2t value (Joule integral) is the integral of the square of the current over a specified time interval:

The I2t values for pre-arcing (I2ts) and for clearing (I2tA _ sum of the pre-arcing and arcing I2t value).

Power dissipation

The power dissipation is the power which is dissipated in a fuse-link which is conducting its rated current under specified conditions.

Arc voltage Ûs

The arc voltage is the highest voltage which occurs at the fuse link connec-tions during the arcing time.

Residual value factor RW

The residual value factor is a reduction factor which is used to determine the permissible load duration of the fuse link with currents which exceed the permissible load current In’ (refer to the rated current In).

Prospective short-circuit current Ip

The prospective short-circuit current is the RMS value of the AC current compo-nent at the line frequency or the value of the DC current which can be expected in the case of a short-circuit which occurs after the fuse if it is considered that the fuse will be replaced by an ele-ment with an impedance which can be neglected.

Virtual time tv

The virtual time is the time which is obtained if the I2t value is divided by the square of the prospective current:

The virtual pre-arcing time tvs is speci-fied in the time/current characteristic.

Cyclic load factor WL

The cyclic load factor is a reduction fac-tor for the rated current for cyclic load states.

I2t i2 tdt0

t1

∫=

tv

i2∫ dt

Ip2

---------------=

Recovery voltage Vw

The recovery voltage (RMS value) is the voltage which is present at the connec-tions of a fuse link after the current has been interrupted.

Time/current characteristic

The time/current characteristic speci-fies, for specific operating conditions, the virtual time (e.g. the pre-arcing time) as a function of the prospective current.

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Index

Page

Numerics

3NC1 0.. 763NC1 1.. 783NC1 4.. 80, 823NC1 5.. 843NC2 2.. 863NC2 4..-3 343NC5 531 923NC5 8.. 923NC7 3..-2 963NC8 4..-3 403NE1 0..-0 443NE1 0..-2 503NE1 2..-0 443NE1 2..-2 503NE1 3..-0 463NE1 3..-2 503NE1 4..-0 463NE1 4..-1 483NE1 4..-2 523NE1 8..-0 423NE3 22. 603NE3 23. 62, 643NE3 4.. 663NE3 5..-5 883NE3 6.. 663NE4 1.. 583NE4 1..-5 883NE4 3..-0B 563NE4 3..-6B 903NE4 337 563NE4 337-6 903NE5 4.. 683NE5 433-1 683NE5 6.. 703NE6 4.. 943NE6 437-7 943NE7 4.. 723NE7 6.. 723NE8 0..-1 543NE8 7..-1 36, 383NE9 440-6 943NE9 450 943NE9 450-7 943NE9 6.. 74

Page

A

Accessories 114Accessories for cylindrical fuses 30Accessories for l.v.h.b.c. fuses 26Actual clearing time 109Applications 4Arc I2t value 108Arc voltage Ûs 111, 113, 121

B

B2 107B6 107

C

Characteristics 34Clearing I2t value 108, 113Continuous interrupt-

free load 116Continuous load 115Converter circuit 107Correction factor kA 108Correction factor

ambient temperature 105Correction factor

connection cross-section 105Correction factor

valve conducting period 106Correction factor

increased air cooling 106Cyclic load factor 106Cyclic load factor WL 105, 121Cyclic load with

known load duty cycle 115, 117

D

DC current applications 113Defining the rated current 115Dimension drawings 98Double-3-pulse center-tap circuit 107

E

Environmental friendly recycling 6External short circuit 4

Page

F

File number 6Function Class 120Function Class a 120Function Class g 120Fuse bases 114Fuse currents

for converter operation 107Fuse puller 114Fused switch disconnector 114

G

Terminology 120Guide number 6

I

I2t value 108, 121l.v.h.b.c./h.v.h.b.c. Recycling 6Important notes 6Important information 6Indicator 114Influence of the power factor 109Internal short-circuit 4Inverter commutation faults 4Inverter operation 104

L

Load capacity 104Let-through current Ic 110, 120Let-through current characteristic 120Liability exclusion 7

M

M1 107M2 107M3 107M3.2 107M6 107Maximum clearing time 112

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123

Page

O

Occasional impulse load 116, 118Ordering and engineering data 10

P

Parallel circuit 111Permissible DC voltage 113Possible arrangements 4Power dissipation 111, 121Properties 4Prospective short-circuit current Ip121

R

Rated frequency 120Rated interrupting capacity 111, 120Rated voltage Vn 104, 120Rated current In 104, 120Rectifier operation 104Recovery voltage 108Recovery voltage Uw 121Recycling 6Regulations 3Residual value factor RW 110, 121RMS value of the branch current 107RMS value of the phase current 107

S

Selection examples 116Series circuit 112Single-phase bi-directional circuit 107Single-pulse center-tap circuit 107SITOR fuse links 10, 34SITOR fuse links for

special applications 22, 88Six-pulse bridge circuit 107Six-pulse center tap circuit 107Switch disconnector with fuses 114

Page

T

Taking into account the pre-loading condition 110

Taking into account the recovery voltage 108

Technical information 104Temperature rise 111Test cross-sections 105Three-pulse center-tap circuit 107Time/current characteristic 121Time/current characteristics 109Two-pulse bridge circuit 107Two-pulse center-tap circuit 107

U

Unknown cyclic load 115, 117Updated information 6Utilization category 120

V

Virtual clearing time 109Virtual time tv 121

W

W1 107

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Notes Kan

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