Bussmann High Voltage Fuses Catalogue

7/29/2019 Bussmann High Voltage Fuses Catalogue

1/65

For more information visit our website www.bussmann.com1

High Voltage Fuse Technology

End cap Porcelain barrel

Fuse elements Granular Quartz Striker coil Expelled striker

Star core Moisture tight seal

GranularQuartz

Fuse elements

Porcelain barrel

Cross Section

Current Limiting

For the protection of equipment operating above 1000 volts AC

Silver ceramicpoint contact

Star coreStriker coil

Current l imit ing HV fuse l inks spl i t into three

internationally recognised types: back-up (or partialrange) fuse links, which will interrupt any currentfrom their rated breaking capacity down to a minimumbreaking current specified by the manufacturer; andgeneral purpose fuse links, which will interrupt allcurrents from rated breaking capacity down to acurrent that w ill melt the elements within one hour.A third type is the full range fuse. This term appliesto fuse links that can interrupt any current belowthe rated breaking capacity that melts the fuseelements satisfactorily.

Current limiting back-up fuse links are the closest in

construction to LV cartridge types. However, a longer stripelement with many more restrictions is necessary toproduce the large number of series arcs needed tointerrupt a high voltage. Fuse manufacturers achievethis by coiling the element around a ceramic core with astar shaped cross section. In this way, a 1m long elementcan be fitted into a 250mm long fuse body. If the adjacentcoils are too close, there will be a flashover betweenthem and this sets a practical limit on how long anelement can be crammed into a particular cartridge, andhow many elements can be used in parallel.

Like an LV cartridge fuse link, an HV fuse link of thistype has a ceramic body.

Many HV current limiting fuse links are also fitted witha striker mechanism. This not only provides the user

with a visual indication that the fuse link has operated,but can also be used to operate other switchgear. Inthis way, a fuse on a single phase system can cut off allthree phases if a fault occurs.

Striker mechanisms are driven by explosive charges orcompressed springs. Both are triggered by a thin fusewire running the length of the fuse, usually through thecentre of the star shaped core. The wire is connected

in parallel with the elements, so a current flowsthrough it when the elements melt. The currentheats up the wire and detonates the explosivecharge, or melts the wire andreleases the spring,pushing the striker pin out of the fuse links end

cap. A lock washer mechanism makes it impossibleto push the pin back into the fuse body.

There are several variations on this design for specificapplications. For example, the elements in three-phase motor protect ion fuse links are corrugated towithstand the cyclical mechanical stresses inducedby the high starting and stopping currents drawnby the motor.

CABLE JOINTS, CABLE TERMINATIONS, CABLE GLANDS, CABLE CLEATSFEEDER PILLARS, FUSE LINKS, ARC FLASH, CABLE ROLLERS, CUT-OUTS

11KV 33KV CABLE JOINTS & CABLE TERMINATIONSFURSE EARTHINGwww.cablejoints.co.uk

Thorne and Derrick UK

Tel 0044 191 490 1547 Fax 0044 191 477 5371Tel 0044 117 977 4647 Fax 0044 117 9775582


2/65

2

High Voltage Fuse Technology

For more information visit our website www.bussmann.com

M- effect

Bussmann high voltage fuse links include M-effect as a design feature to enhance performance. M-effect

(named after its discoverer, Prof. Metcalf, in the late 1930s) consists of applying overlay spots of special low

melting alloy onto the fuse element strips. Its effect is to ensure that the fuse link runs cooler in service and

that the maximum temperature reached during fuse operation is kept down to a modest 160 deg. C

(compared with 300 - 400 deg C for fuse links which do not employ this feature).

M-effect has been in widespread use in both low voltage and high voltage fuse links of British design for

many years and is now coming into use in many other countries. Cooler running M-effect fuse links have

longer service life since lower surface temperature on the elements ensures against long term embrittlement

of the material. The M-effect spots are stable and have been proved by many tests to remain inert for

periods of 30 years or more.

The low maximum operating temperature of M-effect fuse links ensures safe operation of Back-up types in

striker tripped switchgear under low fault conditions. Whereas non M-effect types are known to have a risk

of body fracture because of their much higher body temperature under such conditions. The low maximum

operating temperature also ensures against damage to heat sensitive fuse enclosures such as cast resin

fuse pods.

In short, M-effect fuse links are safer, give better protection and are longer lasting than alternative designs

which do not employ this valuable feature.

Essentially, non-current limiting fuse links have short

elements and incorporate some means of lengtheningthe arc after the element melts, extinguishing the arcand preventing re-ignition. There are two distinct types:expulsion fuse links and liquid fuse links.Expulsion fuses are an effective way of protectingoverhead distribut ion lines and transformers. They aredesigned for outdoor use only and comprise a tin orcopper fuse element in series with a flexible braid in atube. The tube forms one side of a triangle, with alatched connection at the top and a hinge at thebottom. The braid emerges from one end of the fuselink and is held in tension by a spring.When the element melts, the braid is no longer undertension, the latch is released and the fuse swings

downwards under gravity, breaking the circuit. As the

fuse swings downwards, the arc is lengthened,extinguished and prevented from restriking.Liquid fuse links are based on early non-currentlimiting fuse links which use liquids to quench the arc.The fuse element is anchored to the top ferrule of aglass tube filled with a quenching liquid - usually ahydrocarbon. The rest of the tube is filled with aspring that holds the element - or a strain wire in veryhigh voltage fuse links - in tension.When the element melts, the spring pulls the twoparts of the element apart, extending the arc andquenching it in the liquid.

Non- Current Limiting

For the protection of equipment operating above 1000 volts AC


3/65

3

DIN - Fuse Links

Fuse Links comply with DIN dimensionalstandard DIN43625.

F range, high performance full range fuse link.

S range, high performance back-up fuselink, with striker tripping.

A range, including high current ratingback-up fuse link.

Comply with IEC 60282-1 and VDE 0670 part 4.

Wide variety of ratings, 3.6 kV to 36 kV.

Versions suitable for indoor and outdoor use.

Motor circuit fuse link option.

Bussmann DIN S Fuse Links

The time current characteristics of the S range is optimised to ensure improved discrimination with upstream devicesand to give fast clearance of earth faults in the secondary terminal zones. The breaking performance with low overcurrents is adequate to cater for all normal distribution applications, where low voltage fuse links on the secondary sidetake care of low overload faults, leaving the high voltage fuse links to clear major faults ahead of LV protection. The fuselinks are suitable for use even where there is no secondary LV protection, provided that they are used in fuse switchesfitted with instantaneous striker tripping.

Bussmann DIN F Fuse Links

The F range fuse links have full range clearing capability. Bussmann F types are designed to clear all overloads rightdown to fuses rated current in accordance with latest IEC 282-1 requirements. They are thus suitable for use as a soleform of protection. F range time current characteristics are especially advantageous for transformer protectionapplications.

Bussmann DIN A Fuse Links

This earlier, well proven design, has values of minimum breaking current between the S and F range including highercurrent ratings.



4/65

4

DIN - Fuse Links

Part Number

CurrentRating

Length Diameter

Un

kV

In

A

I1

kA mmm W

A2s

mm

WeightBreakingCapacity

I3

A

MinimumBreaking Current

Cold resistance and watts lossin free air at rated current

JouleIntergral

(I2t)

7.2SDLSJ6.37.2SDLSJ107.2SDLSJ167.2SDLSJ207.2SDLSJ257.2SDLSJ31.57.2SDLSJ407.2SDLSJ507.2SDLSJ63

7.2SFLSJ807.2SFLSJ1007.2SFLSJ1257.2SFLSJ160

12SDLSJ6.3

12SDLSJ1012SDLSJ1612SDLSJ2012SDLSJ2512SDLSJ31.512SDLSJ4012SDLSJ5012SDLSJ63

12SFLSJ5012SFLSJ6312SFLSJ8012SFLSJ100

12SKLSJ12512SXLEJ16012SXLEJ200

15.5SFMSJ10015.5SKMSJ125

17.5SDLSJ6.317.5SDLSJ10

17.5SDLSJ1617.5SDLSJ2017.5SDLSJ2517.5SDLSJ31.517.5SDLSJ40

17.5SFLSJ31.517.5SFLSJ4017.5SFLSJ50

17.5SDMSJ6.317.5SDMSJ1017.5SDMSJ1617.5SDMSJ2017.5SDMSJ2517.5SDMSJ31.517.5SDMSJ40

17.5SFMSJ5017.5SFMSJ6317.5SFMSJ80

24SDMSJ6.3

24SDMSJ1024SDMSJ1624SDMSJ2024SDMSJ2524SDMSJ31.524SDMSJ40

24SFMSJ4024SFMSJ5024SFMSJ6324SFMSJ7124SHMEJ8024SHMEJ10024SKMEJ12524SXMEJ160

36SDQSJ3.1536SDQSJ6.336SDQSJ1036SDQSJ1636SDQSJ2036SDQSJ25

36SFQSJ31.536SFQSJ4036SFQSJ5036SXQEJ63

7.27.27.27.27.27.27.27.27.2

7.27.27.27.2

12

1212121212121212

12121212

121212

15.515.5

17.517.5

17.517.517.517.517.5

17.517.517.5

17.517.517.517.517.517.517.5

17.517.517.5

24

242424242424

2424242424242424

363636363636

36363636

6.310162025

31.5405063

80100125160

6.3

10162025

31.5405063

506380100

125160200

100125

6.310

162025

31.540

31.54050

6.310162025

31.540

506380

6.3

10162025

31.540

4050637180100125160

3.156.310162025

31.5405063

404040404040404040

40404040

50

5050505050505050

50505050

506363

2525

35.535.5

35.535.535.535.535.5

35.535.535.5

35.535.535.535.535.535.535.5

353535

50

505050505050

5050505063636363

2035.535.535.535.535.5

35.535.535.520

2031494980100114143180

264338375525

20

2835729090128196275

160227256446

870500610

707990

2319

5980100118148

118132225

16275780100100143

180240270

19

28478084105140

119225306350300350420320

-23357098112

116178255280

20599.765.148.932.626.016.012.98.14

6.014.653.602.73

285

14381.454.643.732.821.615.112.1

17.112.18.975.61

4.604.303.80

8.235.61

313185

10469.255.441.431.1

30.321.917.3

50921511279.863.847.931.6

25.017.813.1

489

28716579.362.046.534.0

38.027.121.617.720.518.016.714.0

-68440216511798.0

73.452.436.835.0

111923272836364645

54647997

14

1826283543495975

61698883

115200330

119126

1523

3438485876

375162

26283738526166

88102128

24

356038495679

8596128134250350

171

279

-3444526285

96116133271

292292292292292292292292292

292292292292

292

292292292292292292292292

292292292292

292292292

442442

292292

292292292292292

292292292

442442442442442442442

442442442

442

442442442442442442

442442442442442442442442

537537537537537537

537537537537

4.8X101

2.5X102

5.5X102

9.7X102

5.7X102

8.9X102

2.0X102

3.2X102

8.0X102

5.0X103

9.1X103

1.5X104

3.0X104

7.0X101

3.1X102

9.8X102

5.7X102

8.9X102

1.6X103

3.2X103

1.3X103

2.3X103

5.2X103

1.0X104

1.9X104

1.4X104

2.8X104

1.1X105

1.5X105

1.2X104

2.4X104

4.8X101

2.8X102

2.9X102

5.7X102

8.9X102

5.1X102

8.0X102

2.6X103

5.1X103

8.1X103

4.8X101

3.1X102

2.9X102

5.7X102

8.9X102

1.6X103

3.2X103

5.2X103

1.0X104

1.9X104

8.1X101

3.1X102

9.8X102

8.1X102

1.3X103

2.1X103

3.2X103

5.1X103

8.1X103

3.8X103

5.0X103

1.7X104

2.8X104

2.4X104

4.4X104

-

1.0X102

3.1X102

4.6X102

8.9X102

1.2X103

2.1X103

4.1X103

8.3X103

1.1X104

6.5X102

2.7X103

8.2X103

1.1X104

8.0X103

1.0X104

2.2X104

3.2X104

7.5X104

6.5X104

1.1X105

1.7X105

3.1X105

6.5X102

2.7X103

8.6X103

5.1X103

8.1X104

1.5X104

2.7X104

3.2X104

5.7X104

4.1X104

8.8X104

1.5X105

2.2X105

2.3X105

5.0X105

6.5X105

1.4X105

2.2X105

6.1X102

4.0X103

2.0X1034.4X103

6.6X103

1.1X104

1.8X104

1.9X104

3.8X104

6.0X104

6.0X102

3.8X103

1.2X104

6.7X103

1.1X104

2.0X104

3.6X104

5.5X104

1.2X105

1.9X105

1.3X103

5.5X103

1.5X104

1.1X104

2.0X104

2.9X104

4.4X104

6.9X104

9.0X104

5.0X104

6.6X104

8.4X104

9.3X104

8.7X104

1.7X105

-1.2X103

3.6X103

5.1X103

8.2X104

1.5X104

2.3X104

3.9X104

8.1X104

6.2X104

50.850.850.850.850.850.850.850.850.8

76.276.276.276.2

50.8

50.850.850.850.850.850.850.850.8

76.276.276.276.2

76.28888

76.276.2

50.850.8

50.850.850.850.850.8

76.276.276.2

50.850.850.850.850.850.850.8

76.276.276.2

50.8

50.850.850.850.850.850.8

76.276.276.276.264647888

50.850.850.850.850.850.8

76.276.276.288

1.631.631.631.631.631.631.631.631.63

3.13.13.13.1

1.63

1.631.631.631.631.631.631.631.63

3.13.13.13.1

3.13.73.7

4.54.5

1.631.63

1.631.631.631.631.63

3.13.13.1

2.22.22.22.22.22.22.2

4.54.54.5

2.2

2.22.22.22.22.22.2

4.54.54.54.53.13.13.74.2

2.92.92.92.92.92.9

6.06.06.06.5

VoltageRating

MaximumTotal Clearing

MinimumPre-Arcing kg

Selection Tables

Table of ratings for S range 7.2 - 36kV to DIN dimensions

Ratingat64%



5/65

5

DIN - Fuse Links

3.6ADOSJ6.33.6ADOSJ103.6ADOSJ163.6ADOSJ203.6ADOSJ253.6ADOSJ31.53.6ADOSJ40

3.6ADLSJ6.33.6ADLSJ103.6ADLSJ163.6ADLSJ203.6ADLSJ253.6ADLSJ31.53.6ADLSJ40

12AILSJ100

17.5AILSJ4017.5AILSJ5017.5AILSJ63

17.5AIMSJ100

24AFMSJ5024AFMSJ6324AIMSJ71

3.63.63.63.63.63.63.6

3.63.63.63.63.63.63.6

12

17.517.517.5

17.5

242424

6.310162025

31.540

6.310162025

31.540

100

405063

100

506371

40404040404040

40404040404040

31.5

252525

25

202020

13314949106106106

13132031106106106

176

7898156

176

137125176

15879.250.838.128.919.211.6

15895.663.345.928.719.111.4

5.03

26.321.112.3

7.33

29.523.615.1

9111821252626

9132225252625

70

587368

102

102130106

192192192192192192192

292292292292292292292

292

292292292

442

442442442

4.5X101

2.3X102

5.5X102

9.8X102

1.3X102

2.9X102

8.0X102

4.5X101

1.3X102

3.0X102

6.3X102

1.3X102

2.9X102

8.0X102

1.4X104

1.3X103

2.0X103

5.0X103

1.4X104

1.8X103

3.2X103

6.3X103

1.9X102

9.7X102

2.4X103

4.2X103

1.2X103

2.7X103

7.5X103

1.9X102

5.4X102

1.3X103

2.7X103

1.2X103

2.7X103

7.5X103

2.0X105

1.8X104

2.7X104

7.0X104

2.0X105

2.9X104

4.5X104

8.5X104

50.850.850.850.850.850.850.8

50.850.850.850.850.850.850.8

76.2

76.276.276.2

76.2

76.276.276.2

1.11.11.11.11.11.11.1

1.631.631.631.631.631.631.63

3.3

3.33.33.3

4.5

4.54.54.5

Part Number

CurrentRating

Length Diameter

Un

kV

In

A

I1

kA mmm W

A2s

mm


I3

A



JouleIntergral

(I2t)

VoltageRating



Selection Tables

Table of ratings for A range 3.6 - 24kV to DIN dimensions

Table of ratings for F range 12 - 24kV to DIN dimensions

12FDLSJ6.312FDLSJ1012FDLSJ1612FDLSJ2012FDLSJ2512FDLSJ31.5

12FFLSJ4012FFLSJ5012FFLSJ6312FXLSJ8012FXLSJ100

24FDMSJ6.324FDMSJ1024FDMSJ16

24FDMSJ2024FDMSJ2524FDMSJ31.5

24FFMSJ2524FFMSJ31.524FFMSJ4024FFMSJ45

121212121212

1212121212

242424

242424

24242424

6.310162025

31.5

40506380100

6.31016

202531.5

2531.54045

505050505050

5050505050

35.535.535.5

35.535.535.5

35.535.535.535.5

6.310162025

31.5

40506380100

6.31016

202531.5

2531.54045

20811655.439.631.226.4

19.714.812.47.945.64

437218118

82.254.748.6

58.648.838.431.4

101517202636

4251727282

212939

434871

47708592

292292292292292292

292292292292292

442442442

442442442

442442442442

6.9X101

2.2X102

8.8X102

1.7X103

2.8X103

2.6X103

3.8X103

6.8X103

5.1X103

2.2X104

4.2X104

6.8X101

2.7X102

8.2X102

1.6X103

3.4X103

3.2X103

3.4X103

4.7X103

7.6X103

7.2X103

6.3X102

2.1X103

3.9X103

7.6X103

1.3X104

1.3X104

3.8X104

5.6X104

5.4X104

1.1X105

2.0X105

5.4X102

2.1X103

2.7X103

5.1X103

1.2X104

1.2X104

1.1X104

1.5X104

2.5X104

3.0X104

50.850.850.850.825.850.8

76.276.276.28888

50.850.850.8

50.850.850.8

76.276.276.276.2

1.631.631.631.631.631.63

3.163.163.16

44

2.22.22.2

2.22.22.2

4.54.54.54.5

Part Number

CurrentRating

Length Diameter

Un

kV

In

A

I1

kA mmm W

A2s

mm


I3

A



JouleIntergral

(I2t)

VoltageRating



Notes

a) 17.5kV fuse links in 10/12 dimensions are offered, since someswitchgear in the 10/12 series is suitable for use at higher voltages.

b) Fuse links listed are normally for indoor use but versions suitable

for outdoor use are olso available in the same ratings anddimensions. For outdoor versions of the S range, replace the Swith a T when ordering - for example TDLSJ

c) * All the fuse link code references listed in the proceeding tablesare for striker fitted versions, for non-striker versions pleasereplace the letter S with the letter N in the code - for exampleSDLNJ. For further information on our parts referencing system,please refer to section 10 of this catalogue.



6/65

6

DIN - Fuse Links

6.3A

10A

16A

20A

25A

31.5A

40A

50A

63A

80A

100

A

125

A

160

A

5

Time current characteristics for 7.2kV DIN Fuse Links, S range, fuse types SDL, SFL


PRE - ARCING TIME IN SECONDS

CURVES

RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE

+10%ONCURRENT

RMSSYMMETICALPROSPECTIVECURRENTINA

MPERES


7/65

7

DIN - Fuse Links

6.3A

10A

16A

20A

25A

31.5A

40A

50A(S

DL)

63A(S

DL)

80A

100A

125A

160A

200A

5

Time current characteristics for 12kV DIN Fuse Links, S range, fuse types SDL, SFL, SKL and SXL



CURVES


+10%ONCURRENT


MPERES


8/65

8

6.3A

10A

16A

20A

25A

31.5A(

SDM)

40A(SDM)

50A(SFM)

63A

80A/75

A

100A(15.5kVONLY)

125A(15.5kVONLY)

5

DIN - Fuse Links

Time current characteristics for 15.5, 17.5kV DIN Fuse Links, S range, fuse types SDL, SFL, SDM, SFM and SKM


CURVES


+10%ONCURRENT


MPERES



9/65

9

DIN - Fuse Links

Time current characteristics for 24kV DIN Fuse Links, S range, fuse types SDM, SXM and SFM


6.3A

10A

16A

20A

25A

31.5A

40A(SDM)

50A

63A

71A

80A

100A

125A

160A

5


CURVES


+10%ONCURRENT


MPERES


10/65

10

DIN - Fuse Links

Time current characteristics for 36kV DIN Fuse Links, S range, fuse types SDQ, SFQ and SXQ

5

6.3A

10A

16A

20A

25A

31.5A

40A

50A

63A

(SXQ)


CURVES


+10%ONCURRENT


MPERES



11/65

11

DIN - Fuse Links

Time current characteristics for 12kV DIN Fuse Links, F range, fuse types FDL, FFL and FXL

1HOUR

100A

80A

63A

50A

40A

31.5A

25A

20A

16A

10A

6.3A

5



CURVES

RELATETOMEANPRE-ARCINGTIMEWITHTOLERANCE+10%ONCURRENT


MPERES


12/65

12

DIN - Fuse Links

Time current characteristics for 24kV DIN Fuse Links, F range, fuse types FDM and FFM

1HOUR

45A

40A

31.5A

25A

20A

16A

10A

6.3A

5

43


CURVES



MPERES



13/65

13

DIN - Fuse Links

Dimensions (mm)

Please refer to the how to order page 61of this catalogue for further details of how orderingcodes are formatted

Force(N)

Fo

rce(N)

60

50

40

0

20

0

05 10 15 20 25 30

Travel (mm)Travel (mm)

PRODUCT CODE

ADOSJSDOSJADLSJFDLSJSDLSJFDMSJSDMSJSDQSJSFOSJAILSJFFLSJSFLSJ

SKLSJAIMSJFFMSJSFMSJSKMSJSFQSJSXLSJSXMSJSXQSJFXLSJ

A

192192292292292442442537192292292292

292442442442442537292442537292

D

515151515151515176767676

76767676767688888888

60

70

80

90

50

40

30

20

10

05 10 15 20 25 30

26mm maximum travel after operation

Striker characteristics

E = Spring Striker 80N to IEC 60282-1designation medium

S = Spring Striker 50N to DIN 43625and IEC 60282-1 designation medium



14/65

14

DIN - Fuse Links

Min Max Min Max Min Max

Transformer Primary Voltage

Tranformer

Rating

(kVA)

10(kV)

20(kV)

30(kV)

Rated Current of theHigh Voltage Fuse Link



501001251602002503154005006308001000

8012516020025031540050063080010001250

10162025

31.540506380100125125

101625

31.531.550638080100125125

6.3101016162025

31.540505063

6.31616162025

31.54050505071

3.156.36.3101616162025

31.54050

3.1510101016162025

31.5404050

Low Voltage

NH Fuse Size

gG/gL

(A)

General guide to the selection of DIN Fuse Links for use in the primary circuit of three phase transformers

1. The fuse link should withstand transformer magnetising inrushcurrents, taken as 12 times full load current for 0.1 seconds.

2. The fuse link should discriminate with the rating of secondaryfuse link stated or where only individual cable exit protectionexists, the highest rating likely to be used.

3. The fuse link should operate within 2 seconds for transformerscomplying with IEC60076 - 5 in respect of impedance, voltageand short circuit withstand current.

4. The fuse link should operate reasonably quickly in the event of atransformer internal fault, or an earth fault in the secondaryterminal zone of the transformer.

5. In the case where there is no secondary fuse link for overloadprotection, the minimum recommended HV fuse link ratingapplies to the use of fuse links in encapsulated enclosures wherepermissible continuous overload is generally limited to 20% oftransformer full load current. However if greater overload currentsare permissible a higher rating of fuse link may be required.Where the fuse link is used in open air or condit ions of unrestrictedventilation a higher permissible overload may be possible.

6. In most cases more than one rating of HV fuse link is recommendedfor a particular transformer size. Choice of fuse link will then

depend on which fuse offers the best protection e.g. having one fusefor several transformer sizes.

Recommendations for other voltages are available on request.

For HV DIN Fuse Links type SXLSJ, SDLSJ, SFLSJ, SKLSJ, SDMSJ, SFMSJ, SXMSJ SDQSJ, SFQSJ. Selection guideusing LV Fuse Links operating class gG/gL on the low voltage side for overload protection of the transformer.

Selection of these HV fuse links has been based on the following:



TranformerRating

(kVA)

10(kV)

20(kV)

30(kV)




50100125160200250315400500630

8001000125016002000

6.31616162025

31.5405063

80100125160200

101625

31.531.550638080

100

125125200200200

6.36.310101616202025

31.5

40506371100

6.31616162025

31.5405050

5071100100160

3.156.36.36.3101016161620

2531.5405063

3.1510101016161625

31.540

4050506363

For HV DIN Fuse Links type SXLSJ, SDLSJ, SFLSJ, SKLSJ, SDMSJ, SFMSJ, SXMSJ SDQSJ, SFQSJ. Selection guideusing LV Fuse Links operating class gG/gL on low voltage side for individual cable exit protection.


Selection

Table

forBack-up

Fuse

Links

Selection

Table

forBack-up

Fus

e

Links


15/65

15

DIN - Fuse Links

Min Max Min Max


TranformerRating

(kVA)

10(kV)

20(kV)



501001251602002503154005006308001000

6.31016162025

31.540506380100

102025

31.540506380100100100100

6.36.36.3101016162025

31.54045

6.31016162025

31.54045454545


For HV DIN fuse links type FDLSJ, FFLSJ, FXLSJ, FDMSJ, FFMSJ. Selection guide using LV fuse links operatingclass gG/gL on low voltage side for individual cable exit protection.




TranformerRating

(kVA)

10(kV)

20(kV)

30(kV)




Low Voltage

NH Fuse Size

gTr

(A)

100125160200250315400500

6308001000

100125160200250315400500

6308001000

16162025

31.5405063

80100125

161625

31.540506380

100125160

10101616162525

31.5

406363

101016162525

31.540

506380

6.310101616202525

31.54040

6.3101016202525

31.5

405050

For HV DIN fuse links type SXLSJ, SDLSJ, SFLSJ, SKLSJ, SDMSJ, SFMSJ, SXMSJ SDQSJ, SFQSJ. Selection guideaccording to DIN VDE 0670 part 402 using LV fuse links operating class gTr on low voltage side for overloadprotection of the transformer.










Selection

Table

forBack-up

Fuse

Links

Selection

Table

forFullRangeF

use

Links


16/65

16

DIN - Fuse Links

Min Max Min Max


TranformerRating

(kVA)

10(kV)

20(kV)

Rated Current of theHigh Voltage Fuse Link Rated Current of theHigh Voltage Fuse Link

1001251602002503154005006308001000

1001251602002503154005006308001000

101616202540405080100100

2025

31.540506380100100100100

6.3101016202025

31.54045-

1016162025

31.540454545-

Low Voltage

NH Fuse Size

gTr

(kVA)


For fuse links type FDLSJ, FFLSJ, FXLSJ, FDMSJ, FFMSJ. Selection guide according to DIN VDE O670 part 402using LV fuse links operating class gTr on low voltage side for overload protection of the transformer.

Min Max Min Max


TranformerRating

(kVA)

10(kV)

20(kV)



50100125160200250315400500

630800

80125160200250315400500630

8001000

6.310161620

31.5404050

100100

6.3101620

31.540406363

100100

6.310101616162025

31.5

40-

6.3101016162020

31.540

45-

Low Voltage

NH Fuse Size

gG/gL

(A)

For HV DIN fuse links type FDLSJ, FFLSJ, FXLSJ, FDM SJ, FFMSJ. Selection guide using LV fuse links operatingclass gG/gL on low voltage side for overload protection of the transformer.











Selection

Table

forFullRange

Fuse

Links

Selection

Table

forFullRangeF

use

Links


17/65

17

Motor Fuse Links

Bussmann Motor Fuse Links

The Bussmann range of motor fuse links are designed to meet the specific requirements necessary for motor

protection. During the starting cycle of direct on-line motors, the fuse elements will reach a considerably higher

temperature than during normal operation; (this is due to the the high amount of current the motor will draw as it starts,

typically, 6 times its normal load current value). This results in expansion and contraction of the fuse elements andcould cause premature operation of the fuse.

Bussmann motor fuse links encompass an advanced design to minimise this effect. This therefore, negates the need

to over specify the fuse rating due to high values of of motor starting current.

Bussmann motor fuse links operate extremely quickly under heavy fault currents, resulting from the time / current

characteristic. Low power dissipation ensures low temperature rise, important in multi-tier starters for example.

Switching (Arc), voltages are lower than permitted values, therefore, 5.5kV fuses are also suitable for 4.8kV and 2.4kV circuits.

Motor fuse links comply withIEC60282-1, IEC644 and BS5907.

Available in DIN 43625 and BS2692 dimensions.

Sold in a wide range of ratings from:3.6 kV 5 to 450 A7.2 kV 5 to 355 A

North American dimensioned products alsoavailable. 2R to 24R ratings.

DIN Dimensioned Motor Fuse Links

British Standard Motor Fuse Links North American M otor Fuse Links



18/65

Application

Fuse Links provide short circuit protection in motor circuits to both the motor starter and cables from the starter to the motor.Overload protect ion is provided by the motor starter, generally by an overload relay and contactor. Combination striker tripping

may also form part of associated equipment which houses the fuse links and motor starters.

Application Procedure

For any motor the fuse current rating is determined by magnitude and duration of starting current, except in a few situationswhere the starting currents are very light. The fuse current rating should therefore be selected as follows:

Direct-on- line Starting

In the absence of specific information the starting current can usually be taken to be six times the motors full load current.The starting time will depend on the type of the drive but will be approximately as follows:

Pump Motors - 6 seconds

Mill Motors - 10 to 15 seconds

Fan Motors - 60 seconds

These are average values and the appropriate figures for starting current and starting time for actual installation should be obtainedwherever possible.

Multiply the starting current by 1.7 and using this value of current and the starting time, (it is recommended that a minimumtime of 5 seconds be adopted), plot this point on the time-current characteristics of the fuse link. The correct current ratingof the fuse is then chosen as being the one immediately to the right of the point so plotted. The chosen fuse must also havea current rating of at least 1.3 times the full-load current of the associated motor.

The rating chosen will be adequate for normal applications where the associated motor is not started more than twice in givenperiod of one hour.

For applications using more frequent starting duties, a greater derating factor must be applied as shown in the following table.

Assisted Starting

A similar method of fuse selection may be used as for direct-on-line starting (see above), but it must be noted that thenormal running current of the motor is likely to be closer in value to the nominal current rating of the fuse than for direct-on-line applications.

The rating of fuse chosen will need to be appreciably greater than the motor running current to allow for restricted cooling insidecontrol gear cubicles, particularly where multi-tier starters are involved. In case of doubt refer to Bussmann for further guidance.

Note

For applications involving more frequent starting duties than 16 times per hour or where unusual duty cycles are involved,consult Bussmann application engineers for advice.

18

Motor Fuse Links

Maximum 2 starts per hour - Derating factor 1.7 Maximum 8 starts per hour - Derating factor 2.1

Maximum 4 starts per hour - Derating factor 1.9 Maximum 16 starts per hour - Derating factor 2.4



19/65

19

Motor Fuse Links

WDOH6 fuse links also available in the range 6.3 to 40A as code ADOH6.

3.6WJON653.6WJON66.33.6WJON6103.6WJON6163.6WJON6203.6WJON6253.6WJON631.53.6WJON6403.6WJON650

3.6WDOH6503.6WDOH6633.6WDOH6803.6WDOH61003.6WDOH6125

3.6WFOH61603.6WFOH6200

3.6WDFHO503.6WDFHO633.6WDFHO803.6WDFHO1003.6WDFHO125

3.6WFFHO1603.6WFFHO200

3.6WKFHO2503.6WKFHO3153.6WKFHO3553.6WKFHO400

3.6WFGHO31.53.6WFGHO403.6WFGHO503.6WFGHO633.6WFGHO803.6WFGHO1003.6WFGHO1253.6WFGHO1603.6WFGHO2003.6WFGHO250

3.6WKGHO3153.6WKGHO3553.6WKGHO4003.6WKGHO450

7.2WFNHO257.2WFNHO31.57.2WFNHO407.2WFNHO507.2WFNHO637.2WFNHO807.2WFNHO1007.2WFNHO1257.2WFNHO160

7.2WKNHO2007.2WKNHO2247.2WKNHO2507.2WKNHO315

3.63.63.63.63.63.63.63.63.6

3.63.63.63.63.6

3.63.6

3.63.63.63.63.6

3.63.6

3.63.63.63.6

3.63.63.63.63.63.63.63.63.63.6

3.63.63.63.6

7.27.27.27.27.27.27.27.27.2

7.27.27.27.2

56.310162025

31.54050

506380100125

160200

506380100125

160200

250315355400

31.540506380

100125160200250

315355400450

2531.540506380

100125160

200224250315

505050505050505050

5050505050

5050

5050505050

5050

50505050

50505050505050505050

50505050

404040404040404040

40404040

132424565670112112140

180225288360450

600600

152171190190190

300300

520650820820

151151151151170212212300300500

8528529601150

8496107122133133262300337

500500960960

14856.356.333.122.117.710.17.546.03

5.363.682.882.161.73

1.280.938

6.615.033.522.872.44

1.531.24

0.6530.4350.3450.345

18.413.99.246.935.474.403.602.161.771.13

0.6460.5120.4540.379

38.725.518.213.310.47.304.922.942.05

1.631.441.110.779

588121215141721

2021273139

4752

2128313953

5467

57605976

25313238486279759596

8990100108

343540465665696372

9098105107

192192192192192192192192192

192192192192192

192192

254254254254254

254254

254254254254

359359359359359359359359359359

359359359359

403403403403403403403403403

403403403403

2.0X101

1.6X102

1.6X102

1.7X102

3.9X102

6.1X102

1.2X103

2.1X103

3.2X103

1.8X103

3.8X103

6.3X103

9.8X10

3

1.5X104

3.1X104

5.7X104

1.8X103

3.1X103

6.3X103

9.5X103

1.3X104

3.4X104

5.1X104

1.8X105

4.1X105

6.4X105

6.4X105

4.5X102

8.0X102

1.8X103

3.2X103

5.1X103

7.9X103

1.2X104

3.4X104

5.1X104

1.3X105

4.5X105

6.4X105

8.2X105

1.2X106

1.4X102

3.1X102

6.1X102

1.2X103

1.9X103

3.8X103

9.8X103

2.4X104

5.0X104

8.8X104

1.1X105

2.2X105

4.5X105

1.6X103

1.3X103

1.3X103

1.4X103

3.2X103

4.9X103

9.8X103

1.7X104

2.6X104

2.4X104

4.5X104

8.0X104

1.1X10

5

2.2X105

6.2X105

1.1X106

2.4X104

4.5X104

8.0X104

1.2X105

1.8X105

4.1X105

7.2X105

2.4X106

5.0X106

7.0X106

7.0X106

6.0X103

1.2X104

2.2X104

4.5X104

7.5X104

1.2X105

1.7X105

4.2X105

7.0X105

1.9X106

6.0X106

8.5X106

1.1X107

1.5X107

2.1X103

4.7X103

8.0X103

1.5X104

3.0X104

5.8X104

1.3X105

2.4X105

7.0X105

1.3X1061.6X106

1.6X106

3.1X106

353535353535353535

5151515151

7676

5151515151

7676

76767676

76767676767676767676

76767676

767676767676767676

76767676

0.540.540.540.540.540.540.540.540.54

1.11.11.11.11.1

2.12.1

1.461.461.461.461.46

3.23.2

3.23.23.23.2

4.14.14.14.14.14.14.14.14.14.1

3.93.93.93.9

4.44.44.44.44.44.44.44.44.4

4.44.44.44.4

Part Number

CurrentRating

Length Diameter

In

A

Un

kV

I1

kA mmm W

A2s

mm


I3

A



JouleIntergral

(I2t)

VoltageRating



Selection Tables

Table of ratings for motor fuses 3.6 - 7.2kV to British Standard dimensions



20/65

20

Motor Fuse Links

Higher Current Ratings

Higher ratings than those tabulated above can be obtained by using fuse links connected in parallel. Special fixing arrangements forconnecting up to 3 fuse links in parallel, are available. Please contact Bussmann application engineers for more details. The codedesignations for these arrangements are given in How to Order (page 61), dimensional drawings are given on page 26.

Selection Tables

Table of ratings for motor fuses 3.6 - 7.2kV to DIN dimensions

3.6WDOSJ503.6WDOSJ633.6WDOSJ803.6WDOSJ1003.6WDOSJ125

3.6WFOSJ1603.6WFOSJ200

3.6WDLSJ503.6WDLSJ633.6WDLSJ803.6WDLSJ1003.6WDLSJ1253.6WFLSJ160

3.6WFLSJ200

3.6WKLSJ2503.6WKLSJ3153.6WKLSJ400

7.2WFMSJ257.2WFMSJ31.57.2WFMSJ407.2WFMSJ507.2WFMSJ637.2WFMSJ807.2WFMSJ1007.2WFMSJ1257.2WFMSJ160

7.2WKMSJ2007.2WKMSJ2247.2WKMSJ2507.2WKMSJ3157.2WKMSJ355

3.63.63.63.63.6

3.63.6

3.63.63.63.63.63.6

3.6

3.63.63.6

7.27.27.27.27.27.27.27.27.2

7.27.27.27.27.2

506380100125

160200

506380100125160

200

250315400

2531.540506380100125160

200224250315355

5050505050

5050

505050505050

50

505050

636363636363636363

6363636363

180225288360450

600600

152171190190190300

300

820820820

8496107122133133262300337

5005009609601000

5.363.682.882.161.73

1.280.938

7.735.94.123.382.851.74

1.42

0.7410.5070.401

33.925.417.814.811.68.125.333.192.23

1.791.591.230.8690.724

2021273139

4752

273237466161

80

676990

334056536172747079

99110107120125

192192192192192

192192

292292292292292292

292

292292292

442442442442442442442442442

442442442442442

1.8X103

3.8X103

6.3X103

9.8X103

1.5X104

3.1X104

5.7X104

1.8X103

3.1X103

6.3X103

9.5X103

1.3X104

3.4X104

5.1X104

1.9X105

4.0X105

6.4X105

1.4X102

3.1X102

6.1X102

1.2X103

1.9X103

3.8X103

9.8X103

2.4X104

5.0X104

8.8X104

1.1X105

2.2X105

4.5X105

6.4X105

2.4X104

4.5X104

8.0X104

1.1X105

2.2X105

6.2X105

1.1X106

2.4X104

4.5X104

8.0X104

1.2X105

1.8X105

4.1X105

7.2X105

2.4X106

5.0X106

7.0X106

2.1X103

4.7X103

8.0X103

1.5X104

3.0X104

5.8X104

1.3X105

2.4X105

7.0X105

1.3X106

1.6X106

1.6X106

3.1X106

3.9X106

5151515151

7676

515151515176

76

767676

767676767676767676

7676767676

1.11.11.11.11.1

2.12.1

1.631.631.631.631.633.16

3.16

3.163.163.16

5.25.25.25.25.25.25.25.25.2

5.25.25.25.25.2

Part Number

CurrentRating

Length Diameter

In

A

Un

kV

I1

kA mmm W

A2s

mm


I3

A



JouleIntergral

(I2t)

VoltageRating



Table of ratings for motor fuses 2.75 - 5.5kV to USA dimensions

2.75VFRHA*R2.75VFRHA*R

2.75VFRHA*R

2.75VFRHA*R

2.75VKRHA*R2.75VKRHA*R

2.75VKRHK*R

2.75VKRHK*R

5.5VFNHA*R

5.5VFNHA*R5.5VFNHA*R

5.5VFNHA*R

5.5VKNHA*R5.5VKNHA*R

5.5VKNHK*R5.5VKNHK*R

2.752.75

2.75

2.75

2.752.75

2.75

2.75

5.5

5.55.5

5.5

5.55.5

5.55.5

2R3R

4R

6R

9R12R

18R

24R

2R

3R4R

6R

9R12R

18R24R

6060

60

60

6060

60

60

60

6060

60

6060

6060

180229

257

525

500500

500

500

180

229257

525

500500

500500

6.154.04

2.69

1.62

1.151.03

0.577

0.514

8.35

5.483.65

2.31

1.631.45

0.8150.725

5257

62

65

7080

140

156

70

7785

91

99110

198220

276276

276

276

276276

276

276

403

403403

403

403403

403403

8.1x103

1.9x104

4.2x104

3.9x104

8.8x104

1.1x105

3.5x105

4.5x105

8.1x103

1.9x104

4.2x104

3.9x104

8.8x1041.1x105

3.5x105

4.5x105

2.8x104

7.5x104

1.4x105

3.4x105

8.4x105

1.2x106

3.2x106

5.5x106

2.8x104

7.9x104

1.6x105

3.6x105

8.8x1051.3x106

3.4x106

5.8x106

7676

7676

76

76

76

76

7676

76

76

7676

76

76

2.52.5

2.52.5

2.5

2.5

5.2

5.2

3.83.8

3.8

3.8

3.83.8

7.8

7.8

Part Number

CurrentRating

Length Diameter

In

A

Un

kV

I1

kA mmm W

A2s

mm


I3

A


Cold resistance and watts lossin free air at rated c urrent

JouleIntergral

(I2t)

VoltageRating





21/65

21

Motor Fuse Links

Time current characteristics for 3.6kV Motor Fuse Links, fuse types ADL, WDL, WFL and WKL

6.3A

10A

16A

20A

25A

31.5A

40A

50A

63A

80A

100A

125A

160A

200A

250A

315A

400A

5



CURVES


+10%ONCURRENT


MPERES


22/65

22

Motor Fuse Links

Time current characteristics for 3.6kV Motor Fuse Links, fuse types WDF, WFF and WKF

50A

63A

80A

100A

125A

160A

200A

250A

315A

400A

5


CURVES


+10%ONCURRENT


MPERES



23/65

23

Motor Fuse Links

Time current characteristics for 3.6kV Motor Fuse Links, fuse types WFG and WKG


31.5A

40A

50A

63A

80A

100A

125A

160A

200A

250A

315A

355A

400A

450A

5


CURVES


+10%ONCURRENT


MPERES


24/65

24

Motor Fuse Links

Time current characteristics for 7.2kV Motor Fuse Links, fuse types WFN, WKN, WFM and WKM (* only WKM)

25A

31.5A

40A

50A

63A

80A

100A

125A

160A

200A

224A

250A

315A

355A(WKM)*

5


CURVES


+10%ONCURRENT


MPERES



25/65

25

Motor Fuse Links

Dimensions (mm)

FUSE LINK TYPE

WDOSJWDLSJWFOSJWFLSJWKLSJWFMSJWKMSJ

A

192292192292292442442

D

51517676767676

Fuse Link type: DIN

FUSE LINK TYPE

+WJON6WDO*H6WFO*H6

A

257261261

B

235235235

C

192192192

D

365176

E

9.510.510.5

F

131320

G

252564

H

232942

J

2.42.62.6

Fuse Link type: Tag Type 6 - BS 2692 Standard

+ Fuse type not available withstriker

26mm maximum travel after operation

Fuse type: WJO

min 10 to max 16mm travel after operation

Fuse type: WDO, WFO

Dimensions in mm



26/65

26

Motor Fuse Links

Fuse Link type: Tag Type 0 - BS 2692 Standard

FUSE LINK TYPE

WDFHOWFFHOWKFHOWFGHOWKGHOWFNHOWKNHO

A

337337337442442486486

B

305305305410410454454

C

254254254359359403403

D

51767676767676

Triple barrel fuse link(3rd barrel shown dotted) with 03 tags.

Double barrel fuse link with 02 tagsshown in full lines.

Dimensions (mm)





27/65


Motor Fuse Links

Fuse Link type: USA Motor

FUSE LINK TYPE

VFRHAVKRHAVKRHKVFNHAVKNHAVKNHK

A

276276276403403403

76

A

80Max

10 Min - 16 Max striker travel after operation if fitted

76

K Tags (Double barrel fuse links)

76

A

85

160

10 Min - 16 Max striker travel after operation if fitted10 Min - 16 Max striker travel after operation if fitted

A Tags (ferrule)


FUSE LINK TYPE


A

276276276403403403

Dimensions (mm)


28/65


Motor Fuse Links

Fuse Link type: USA Motor

FUSE LINK TYPE


A

276276276403403403

76

A

80Max

10 Min - 16 Max striker travel after operation if fitted

76


76

A

85

160

10 Min - 16 Max striker travel after operation if fitted10 Min - 16 Max striker travel after operation if fitted

A Tags (ferrule)


FUSE LINK TYPE


A

276276276403403403

Dimensions (mm)


29/65

28

Voltage and Auxiliary Transformer Fuse Links


Bussmann manufacture a wide range of voltage transformer (VT) fuse links. In North America they are referred to asPotential Transformer fuses. These fuse links are designed for use in the primary side of voltage transformers toprovide system isolation in the event of faults occurring in the transformer circuit.

Voltage transformer fuse links, have a preferred current rating of 3.15A. Experience has shown that there is a risk ofspurious operation by transient overcurrents where lower current ratings are used. In addition, in order to minimise therisk of deterioration of the fine fuse elements caused by corona, it is desirable to mount the fuse links so that theearthed metal is not in the immediate vicinity of the part of the barrel between the ferrules.

Higher current and E ratings are available for special applications, including auxiliary transformers.

A range of VT fuse links with a breaking capacity of 200kA for use at the output terminals of large turbo alternatorscan also be ordered. For further information, please contact Bussmann application engineers.

Types prefixed A or N are suitable for use in Air only. Types prefixed O may be used under oil.

For DIN dimensioned voltage transformer and auxiliary transformer fuse links, please refer to DIN dimensionedfuse link section.

British Standard VT Fuse Links.

A range of voltage transformer primaryFuse Links to BS2692-1 and IEC60282-1.

Wide range of ratings from 1 kV to 36 kV.

3.15 Amp industry standard current ratings.

CAV range with ratings from 3.6kV to 38kV.

Bussmann Voltage and Auxiliary Transformer Fuse Links


30/65



The last letter of the ordering code on these items is normally either A or 22, please refer to how to orderpage 61 for an explanation.

1.1NBUN*21.1NBUN*3.151.1NBUN*6.3

3.6ABWN*3.153.6ABWN*6.3

3.6ABCN*3.153.6ABCN*6.33.6ABCN*10

5.5AMWNA0.5E5.5AMWNA1E5.5AMWNA2E5.5AMWNA3E5.5AMWNA4E5.5AMWNA5E

5.5ABWNA0.5E5.5ABWNA1E5.5ABWNA2E5.5ABWNA3E5.5ABWNA5E

7.2ABWN*3.157.2ABWN*6.3

7.2ABCN*3.157.2ABCN*6.3

7.2OBCN*3.157.2OBCN*6.3

7.2OBWN*3.157.2OBWN*6.3

12ABCN*3.1512OBCN*3.15

15.5ABFN*3.1515.5OBFN*3.15

17.5ABGN*3.1517.5OBGN*3.15

24ABGN*3.1524OBGN*3.15

36OBGN*3.15

1.11.11.1

3.63.6

3.63.63.6

5.55.55.55.55.55.5

5.55.55.55.55.5

7.27.2

7.27.2

7.27.2

7.27.2

1212

15.515.5

17.517.5

2424

36

23.156.3

3.156.3

3.156.310

0.512345

0.51235

3.156.3

3.156.3

3.156.3

3.156.3

3.153.15

3.153.15

3.153.15

3.153.15

3.15

505050

5050

505050

505050505050

5050505050

4545

4545

4545

4545

4545

3232

3535

2525

31.5

0.1450.1070.065

0.3580.120

0.3580.1200.080

32.516.00.5840.3200.1900.147

50.225.11.080.4690.199

0.6140.240

0.6140.240

0.6140.240

0.6140.240

1.211.21

1.241.24

1.451.45

2.002.00

2.05

868686

142142

195195195

142142142142142142

142142142142142

142142

195195

195195

142142

195195

254254

359359

359359

359

6.3X100

1.2X101

3.2X101

6.3X100

4.8X101

6.3X100

4.8X101

1.1X102

1.2X100

5.0X100

4.0X100

1.8X101

4.6X101

7.9X101

0.49X100

2.0X100

1.2X100

6.3X100

3.2X101

6.3X100

4.8X101

6.3X100

4.8X101

6.3X100

4.8X101

6.3X100

4.8X101

6.3X100

6.3X100

6.3X100

6.3X100

6.3X100

6.3X100

6.3X100

6.3X100

1.2X101

1.8X101

3.4X101

9.2X101

1.8X101

3.1X102

1.8X101

3.1X102

7.0X102

3.5X100

1.4X101

1.2X101

1.1X102

3.0X102

5.1X102

1.4X100

5.7X100

3.4X100

1.8X101

2.0X102

4.0X101

3.1X102

4.0X101

3.1X102

4.0X103.1X102

4.0X103.1X102

1.8X101

1.8X101

4.0X101

4.0X101

4.0X101

4.0X101

4.0X101

4.0X101

7.7X101

25.425.425.4

25.425.4

25.425.425.4

20.620.620.620.620.620.6

25.425.425.425.425.4

25.425.4

25.425.4

25.425.4

25.425.4

25.425.4

25.425.4

25.425.4

25.425.4

25.4

0.120.120.12

0.190.19

0.2450.2450.245

0.1140.1140.1140.1140.1140.114

0.190.190.190.190.19

0.190.19

0.2450.245

0.2450.245

0.190.19

0.2450.245

0.310.31

0.430.43

0.430.43

0.43

Part Number

CurrentRating

Length Diameter

In

A

Un

kV

I1

kA mm

A2s

mm


Cold Resistance JouleIntergral

(I2t)

VoltageRating



A 36kV AGBN* 3.15A is also available for certain indoor applications. Please contact Bussmanns application engineersfor further information.

Fuse Link type: TAG type A Ferrule and 22

FUSE LINK TYPE

NBUN*ABWNAAMWNAOBWN*ABCN*OBCN*ABFN*OBFN*ABGN*OBGN*

A

86142142142195195254254359359

B

17.5301630303030303030

D

25.425.420.525.425.425.425.425.425.425.4

Table of ratings for voltage transformer fuses 1.1 - 36kV

8mm bolt with BSW thread

Selection Table

*

Ferrule Fuse Link Tag type A shown in full linesand 22 Tag shown in dotted lines


31/65

30



*Curvevalidforall3.15Aratingsshownintheselectiontable.

Curv

evalidforall6.3Aratingsshownin

theselectiontable.

Time current characteristics for 3.6 to 36kV VT Fuse Links of 3.15, 6.3 and 10 Amp ratings

1HO

UR

10A

6.3A

3.15A*

3 4


CURVESR

ELATETOMEANPRE-ARCIN

GTIMEWITHTOLERANCE+

10%ONCURRENT

RMSSYMMETICALPR

OSPECTIVECURRENTINAMPERES


32/65



Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type ABWNA (minimum melting times)

1

0.5E

1E

2E

3E

4E

5E

100

80

605040

30

20

10

8

54

3

2

1

.8

.6

.5

.4

.3

.2

.1

.08

.06

.05

.04

.03

.02

.012 3 4 5 6 8

10

200

300

400

500

0.5 2

030

40

50

60

80

100

TIMEINSEC

ONDS

RMS SYMMETRICAL CURRENT IN AMPS


33/65

32



Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type ABWNA (maximum melting times)

100

80

605040

30

20

10

8

54

3

2

1

.8

.6

.5

.4

.3

.2

.1

.08

.06

.05

.04

.03

.02

.012 3 4 5 6 8

10

200

300

400

500

0.5 2

030

40

50

60

80

100

TIMEINSE

CONDS


0.5E

1E

2E

3E

4E

5E


34/65



Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type AMWNA (minimum melting times)

100

80

605040

30

20

10

8

54

3

2

1

.8

.6

.5

.4

.3

.2

.1

.08

.06

.05

.04

.03

.02

.012 3 4 5 6 8

10

200

300

400

500

0.5 2

030

40

50

60

80

100

TIMEINSECONDS


0.5E

1E

2E

3E

5E


35/65

34



Time current characteristics for E rated 5.5kV VT Fuse Links, fuse type AMWNA (maximum melting times)

100

80

605040

30

20

10

8

54

3

2

1

.8

.6

.5

.4

.3

.2

.1

.08

.06

.05

.04

.03

.02

.012 3 4 5 6 8

10

200

300

400

500

0.5 2

030

40

50

60

80

100

TIMEINSE

CONDS


0.5E

1E

2E

3E

5E


36/65



These Voltage Transformer fuse links are available in the ratings shown in the table above. CAV fuse links are suitable forindoor use in air only. Type CAVH Fuse links are fitted with striker pins which may be used for indication purposes.

Selection Table

Fuse Link type: CAV (Shown with striker fitted)

FUSE LINK TYPE

3.6CAV5.5CAV5.5CAVH7.2CAV12CAV15.5CAV15.5CAVH17.5CAV24CAV36CAV38CAV

38CAVH

A

220

187

220220

327

220340440

440 max 20mm travel after operation

Table of ratings for voltage transformer fuses, 3.6 - 38kV type CAV

mm

3.6CAV2

5.5 CAV15E

5.5CAVH0.5E5.5CAVH1E5.5CAVH2E

7.2CAV27.2CAV47.2CAV67.2CAV10

12CAV2

15.5CAV0.5E15.5CAV1E

15.5CAV2E15.5CAV3E15.5CAV5E15.5CAV7E

15.5CAVH0.5E15.5CAVH1E15.5CAVH2E

17.5CAV217.5CAV417.5CAV617.5CAV10

24CAV224CAV324CAV4

36CAV236CAV4

38CAV4E

38CAVH0.5E

38CAVH1E38CAVH2E

3.6

5.5

5.55.55.5

7.27.27.27.2

12

15.515.5

15.515.515.515.5

15.515.515.5

17.517.517.517.5

242424

3636

38

38

3838

2

15

0.512

24610

2

0.51

2357

0.512

24610

234

24

4

0.5

12

50

50

505050

40404040

40

8080

80808080

808080

40404040

404040

4040

40

40

4040

0.492

0.488

12.112.10.388

0.8930.5030.3210.215

1.34

15175.4

32.316.20.6590.375

30.130.10.947

1.690.6110.3620.239

2.541.430.916

3.121.12

2.42

66.6

66.62.20

220

187

187187187

220220220220

220

327327

327327327327

327327327

220220220220

340340340

440440

440

440

440440

6.2X100

5.5X102

1.4X101

1.4X101

1.8X101

6.2X100

2.0X101

4.8X101

1.1X102

6.2X100

0.5X100

2.0X100

1.2X10

0

4.8X100

2.0X101

7.1X101

1.4X101

1.4X101

1.8X101

6.3X100

4.8X101

1.4X102

3.2X102

6.2X100

2.0X101

4.8X101

6.2X100

4.8X101

1.2X101

1.4X101

1.4X101

1.8X101

1.8X101

3.5X103

9.0X101

9.0X101

1.1X102

1.8X101

5.7X101

1.4X102

3.2X102

1.8X101

1.5X100

5.8X100

3.5X10

0

1.4X101

1.3X102

4.5X102

9.0X101

9.0X101

1.1X102

1.8X101

1.4X102

4.0X102

9.2X102

1.8X101

5.7X101

1.4X102

1.8X101

1.4X102

3.4X101

9.0X101

9.0X101

1.1X102

41.3

41.3

41.341.341.3

41.341.341.341.3

41.3

41.341.3

41.341.341.341.3

41.341.341.3

41.341.341.341.3

41.341.341.3

41.341.3

41.3

41.3

41.341.3

0.7

0.6

0.60.60.6

0.70.70.70.7

0.7

0.90.9

0.90.90.90.9

0.90.90.9

0.70.70.70.7

1.01.01.0

1.21.2

1.2

1.2

1.21.2

kg

Part Number

CurrentRating

Length Diameter

In

A

Un

kV

I1

kA mm

A2s

mm


Cold resistance in freeair at rated current

JouleIntergral

(I2t)

VoltageRating




37/65

36

Current Limiting Fuse Links for use in Oil Switchgear


Fuse Links comply with IEC 282-1, BS2692-1and ESI Standard 12-8.

7.2 and 12kV Fuse Links tested at highestsystem voltage and approved by the UKElectricity Association approvals panel.

Voltage ranges 3.6 to 24kV.

Fitted with powerful pyrotechnic striker pin.

Bussmann under oil Fuse Links

The Bussmann range of oil tight fuse links are designed for use in oil filled switchgear. This type was pioneered inthe U.K. and the Bussmann range has been in continuous manufacture for almost 40 years, being by far the mostwidely used device of its kind in the world. Over 1,000,000 Bussmann branded fuse links have been put into servicewithout a single reported case of oil ingress. A unique triple seal system ensures against long term sealdeterioration. Low power dissipation ensures cool running in oil filled switchgear.

The range is not suitable for use inside oil filled transformer tanks where high oil temperatures may be expected.


Dimensions (mm)


38/65



Selection Table

Part Number

CurrentRating

Length Diameter

In

A

Un

kV

I1

kA mmm

A2s

mm



Dimensional Reference

BS 2692

JouleIntergral

(I2t)

VoltageRating



3.6OEFMA6.33.6OEFMA10

3.6OEFMA16

3.6OEFMA203.6OEFMA25

3.6OEFMA31.53.6OEFMA40


3.6OEFMA80



3.6OEGMA63

3.6OEGMA80

3.6OEGMA100

3.6OEGMA1253.6OEGMA1603.6OEGMA200

3.6OLGMA250


7.2OEFMA112

7.2OHGMA100

7.2OHGMA1257.2OHGMA140

7.2OHGMA160

12OEFMA6.3

12OEFMA1012OEFMA16

12OEFMA2012OEFMA25

12OEFMA31.5

12OEFMA4012OEFMA50

12OEFMA63

12OHFMA7112OHFMA80

12OHGMA6.312OHGMA10

12OHGMA1612OHGMA20

12OHGMA25

12OHGMA31.512OHGMA40

12OHGMA5012OHGMA63

12OHGMA7112OHGMA80

12OHGMA90

12OHGMA100

12OLGMA125

15.5OEFMA6.3


15.5OEFMA20

15.5OEFMA2515.5OEFMA31.515.5OEFMA40

15.5OEFMA50

15.5OEFMA63


15.5OHGMA90

15.5OLGMA100

17.5OHGMA6.3

17.5OHGMA10

17.5OHGMA161 7.5OHGMA20

17.5OHGMA2517.5OHGMA31.5


17.5OHGMA63

17.5OHGMA80

24OEGMA6.3

24OEGMA1024OEGMA1624OEGMA20

24OEGMA25

24OEGMA31.524OEGMA40

24OEGMA50

3.63.6

3.6

3.63.6

3.63.6

3.63.6

3.6

3.63.6

3.63.6

3.63.6

3.6

3.63.63.6

3.6

7.27.2

7.2

7.2

7.27.2

7.2

12

1212

1212

12

1212

12

1212

1212

1212

12

1212

1212

1212

12

12

12

15.5

15.515.5

15.5

15.515.515.5

15.5

15.5

15.515.5

15.5

15.5

17.5

17.5

17.517.5

17.517.5

17.517.5

17.5

17.5

24

2424

2424

2424

24

6.310

16

2025

31.540

5063

80

100125

160200

6380

100

125160200

250

80100

112

100

125140

160

6.3

1016

2025

31.5

4050

63

7180

6.310

1620

25

31.540

5063

7180

90

100

125

6.3

1016

20

2531.540

50

63

7180

90

100

6.3

10

1620

2531.5

4050

63

80

6.3

1016

2025

31.540

50

5050

50

5050

5050

5050

50

5050

5050

5050

50

505050

50

4545

45

45

4545

45

40

4040

4040

40

4040

40

4545

4040

4040

40

4040

4040

4040

40

40

40

40

4040

40

4040

4040

40

4040

40

40

35

35

3535

3535

3535

35

35

25

2525

2525

2525

25

20783.6

42.5

33.926.5

17.615.4

11.57.60

6.03

4.023.02

2.211.74

11.08.70

5.50

4.593.442.29

1.72

8.365.59

4.57

6.09

5.084.35

3.81

520

214108

77.057.8

38.5

28.220.1

15.1

12.310.9

520214

10877.0

57.8

38.528.2

22.617.0

16.6

13.412.2

8.75

7.09

392

188101

78.7

55.336.9

29.522.1

17.8

17.715.5

11.6

10.0

665

282

139100

74.749.8

36.526.0

19.5

15.5

605

290153

11984.5

55.944.7

34.0

F01

F02

F02

F01

F02

F01

F01

F02

F02

F01

F02

F02

F02

F02

254

254254

254

254254

254254

254254

254

254254

254

254

254254

254254

254

254

254

254254

359

359359

359

254

254254

254254

254

254254

254

254254

359

359359

359359

359359

359

359359

359359

359

359

254

254254

254

254254

254254

254

359

359359

359

359

359359

359359

359

359359

359359

359

359359

359

359359

359359

63.5

63.563.5

63.5

63.563.5

63.563.5

63.563.5

63.5

63.563.5

63.5

63.5

63.563.5

63.563.5

63.5

63.5

63.563.5

63.5

63.5

63.563.5

63.563.563.5

63.5

63.563.5

63.563.5

63.563.5

63.563.5

63.5

63.563.5

63.563.5

63.5

63.563.5

63.563.5

63.563.5

63.5

63.5

63.5

63.5

63.563.5

63.563.5

63.5

63.563.5

63.5

63.563.5

63.5

63.563.5

63.5

63.563.5

63.563.5

63.563.5

63.5

63.5

63.563.5

63.5

63.563.5

63.563.5

1.9

1.91.9

1.9

1.91.9

1.91.9

1.91.9

1.9

1.91.9

1.9

2.6

2.62.6

2.62.6

2.6

2.6

1.91.9

1.9

2.62.6

2.62.6

1.9

1.91.9

1.91.9

1.91.9

1.9

1.9

1.91.9

2.6

2.62.6

2.62.6

2.62.6

2.6

2.62.6

2.62.6

2.6

2.6

1.9

1.9

1.91.9

1.91.9

1.9

1.91.9

2.6

2.62.6

2.6

2.62.6

2.6

2.62.6

2.62.6

2.62.6

2.6

2.6

2.62.62.6

2.62.62.62.6

2.0X101

1.4X102

1.7X102

2.7X102

4.5X102

1.0X103

8.9X103

1.6X103

3.3X103

5.2X103

1.2X104

2.1X104

1.5X104

2.4X104

3.2X103

5.2X103

5.0X103

7.2X103

1.3X104

2.9X104

5.1X104

3.2X103

6.3X103

9.1X103

5.0X103

7.2X103

9.8X103

1.3X104

2.0X101

1.4X102

1.7X102

3.4X102

4.0X102

8.9X102

1.5X103

2.9X103

5.1X103

3.2X103

4.1X103

2.0X101

1.4X102

1.7X102

3.4X102

4.0X102

8.9X102

1.5X103

2.3X103

4.1X103

2.0X103

3.2X103

3.8X103

6.3X103

1.0X104

4.8X101

4.0X101

2.7X101

4.5X101

5.2X101

1.2X103

1.8X103

3.3X103

2.0X103

2.5X103

3.2X103

5.0X103

7.2X103

2.0X101

1.4X102

1.7X102

3.4X102

4.0X102

9.0X102

1.5X103

2.9X103

5.2X103

3.8X103

4.8X101

2.5X102

2.7X102

4.4X102

5.2X102

1.2X103

1.8X103

1.2X103

4.9X102

1.4X103

2.4X103

3.6X103

4.8X103

8.8X103

1.0X104

1.4X104

2.4X104

3.4X104

6.2X104

9.6X104

1.6X105

2.3X105

1.9X104

2.7X104

4.9X104

6.4X104

1.0X105

1.8X105

2.7X105

5.8X104

9.0X104

1.3X105

7.5X104

9.6X104

1.4X105

1.8X105

6.1X102

1.8X103

3.0X103

5.0X103

6.5X103

1.2X104

1.8X104

2.8X104

4.3X104

5.4X104

7.0X104

6.1X102

1.8X103

3.0X103

5.0X103

6.5X103

1.2X104

1.8X104

2.4X104

3.7X104

3.9X104

5.5X104

6.2X104

8.9X104

1.7X105

1.0X103

3.4X103

3.4X103

4.9X103

1.1X104

1.5X104

2.0X104

3.0X104

3.9X104

4.4X104

5.4X104

7.5X104

9.6X104

6.1X102

1.8X103

3.0X103

5.0X103

6.5X103

1.2X104

1.9X104

2.9X104

4.5X104

5.7X104

1.0X103

3.4X103

3.4X103

4.9X103

1.1X104

1.5X104

2.0X104

2.4X104

Table of ratings for British Standard Oil tight fuses 3.6 - 24kV


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Selection of these fuse links has been based on a compromise between the following:

1 Withstand against magnetising inrush current is taken as 12 times full-load current for 0.1 second.

2 Withstand against 150% permissible overload current. Recommendations marked with an asterisk or dagger havethe following significance:

* Limited to permissible overload of 130% Permits use of a 12kV OHFMA 80A fuse with a 1000 kVA transformer where permissible overload does notexceed 130%.

3 For 6.6kV systems, 12kV fuse links are recommended where possible in the interests of standardisation.

4 Wherever possible, 254mm long fuse links are offered rather than equivalent 359mm types.

5 The above recommendations are not generally applicable to transformers feeding motor circuits with startingcurrents in excess of the transformer full load current. In this event, please consult Bussmann application engineers.

General guide to the selection of Oil tight Fuse Links for use in the primary circuit of three phase transformers

200

250

300/315

400

500

630

750/800

1000

1250

1600

OEFMA

OEFMA

OEFMA

OEFMA

OEFMA

OEFMA

OLGMA

OLGMA

-

-

63

80

100

125

160

200

250

250*

-

-

3.6

3.6

3.6

3.6

3.6

3.6

3.6

3.6

-

-

OEFMA

OEFMA

OEFMA

OEFMA

OEFMA

OEFMA

OHGMA

OHGMA

OHGMA

-

31.5

40

50

63

71

100

125

140

160*

-

12

12

12

12

12

7.2

7.2

7.2

7.2

-

01

-

02

-

03

-

04

05

-

-

OEFMA

OEFMA

OEFMA

OEFMA

OEFMA

OEFMA

OHFMA

OGFMA

OGFMA

OLGMA

25

25

31.5

40

50

63

80

90

100

125*

12

12

12

12

12

12

12

12

12

12

OEFMA

OEFMA

OEFMA

OEFMA

OEFMA

OEFMA

OEFMA

OHGMA

OHGMA

OLGMA

16

20

25

31.5

40

50

63

71

90

100*

15.5

15.5

15.5

15.5

15.5

15.5

15.5

15.5

15.5

15.5

TransformerkVA Product

CodeRating kV

3.3kV

Transformer Priority Voltage

Current

Rating (A)

Product

Code

Rating kV

6.6kV

Current

Rating (A)

Product

Code

ESI 12-8

Ref.

Rating kV

11kV

Current

Rating (A)

Product

Code

Rating kV

13.8kV

Current

Rating (A)



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Time current characteristics for 7.2kV Oil Fuse Links, fuse type OEF



CURVESRELATETOMEANPRE-ARCING

TIMEWITHTOLERANCE+10%ONCURRENT

RMSSYMMETICALPROS

PECTIVECURRENTINAMPERES


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Time current characteristics for 7.2kV Oil Fuse Links, fuse type OHG


CURVES


RMSSYMMETICALPROSP

ECTIVECURRENTINAMPERES



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Time current characteristics for 12kV Oil Fuse Links, fuse types OEF and OHF



CURVESRELATETOMEANPRE-ARCIN

GTIMEWITHTOLERANCE+

10%ONCURRENT

RMSSYMMETICALPROSP

ECTIVECURRENTINAMP

ERES


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Time current characteristics for 12kV Oil Fuse Links, fuse types OHG and OLG




RM

SSYMMETICALPROSPECTIVECURRENTINAMPER

ES



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Time current characteristics for 15.5kV Oil Fuse Links, fuse types OEF, OHG and OLG





RMSSYMMETICALPROS



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Time current characteristics for 17.5kV Oil Fuse Links, fuse type OHG




RMSSYMMETICALPROS




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Time current characteristics for 24kV Oil Fuse Links, fuse type OEG



CURVESRE

LATETOMEANPRE-ARCING

TIMEWITHTOLERANCE+1

0%ONCURRENT

RM

SSYMMETICALPROSPECTIVECURRENTINAMPER

ES


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Current Limiting Fuse Links for use in Air


High Voltage fuse links for use in Air,comply with BS 2962-1 dimensions.

Available in voltage ranges 3.6 to 72.5kV.

Full range performance option available at12kV and 24kV.

Wide variety of fixing arrangements available.

Powerful pyrotechnic striker fitted.

E-rated North American dimension products

also available.

Suitable for indoor or outdoor use.

British Standard Range

Bussmann Fuse Links for use in air

The Bussmann range of fuse links for use in air are available in Brit ish Standard form, BS 2692, Part 1 1975. A numberof options are available, including full range capability, and alternative fixing arrangements such as different types oftag, studs and collars etc. Details are available on application. Higher current ratings can be obtained by using fuse linksin parallel and special fixing arrangements are available for this purpose.

Bussmann Air Range - USA Dimensions

A comprehensive range of 'E' rated North American Dimension fuse links for industrial applications is also available.These are the latest technology full range fuse links in USA Industrial Standard 2 inch and 3 inch diameter ferrule style.Extended ratings in double barrel assemblies; striker, indicator and tag versions are also available.


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Current Limiting Fuse links for use in Air


Selection Tables

Part Number *

CurrentRating

Length Diameter

In

A

Un

kV

I1

kA mmm

A2s

mm



JouleIntergral

(I2t)

VoltageRating



3.6ADFH*6.3

3.6ADFH*10

3.6ADFH*163.6ADFH*20

3.6ADFH*253.6ADFH*31.5

3.6ADFH*40

3.6ADGH*6.33.6ADGH*10

3.6ADGH*163.6ADGH*20

3.6ADGH*25

3.6ADGH*31.53.6ADGH*40

3.6ADGH*503.6ADGH*63

3.6ADGH*803.6ADGH*100

7.2ADFH*6.3


7.2ADFH*20

7.2ADFH*257.2ADFH*31.5


7.2ADFH*63

7.2AFFH*807.2AFFH*100

7.2BDGH

Bussmann High Voltage Fuses Catalogue

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