PIE 3N Ingles

SELF-POWEREDOVERCURRENT PROTECTION RELAY

TYPE PIE-3NUSER'S HANDBOOK

DOC 1/03 - V 0.0NUM. 651.601.049

0.- INDEX.

0.- INDEX.................................................................................................................................................... I

1.- OBJECTIVE ......................................................................................................................................... 1

2.- AREA OF APPLICATION.................................................................................................................. 1

3.- OPERATION ........................................................................................................................................ 1

4.- ADJUSTMENT..................................................................................................................................... 2

5.- TECHNICAL CHARACTERISTICS................................................................................................. 6

6.- RECEIPT AND STORAGE............................................................................................................... 10

7.- MOUNTING INSTRUCTIONS ........................................................................................................ 107.1. INSPECTION.......................................................................................................................... 107.2. CHECKING THE NOMINAL CHARACTERISTICS .......................................................... 107.3.CHECKING THE EXTERNAL CIRCUITS. .......................................................................... 11

8.- EXTERNAL CONNECTIONS.......................................................................................................... 12

9.- DIMENSIONS..................................................................................................................................... 13

10.- TRANSFORMERS ........................................................................................................................... 14

PIE-3NUSER'S HANDBOOKNUM. 651.601.049

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SELF-POWERED

OVERCURRENT PROTECTION RELAY

PIE-3N

1.- OBJECTIVE

This user's handbook is intended to aid the configuration and use of the PIE-3N overcurrent

protection relay.

2.- AREA OF APPLICATION

This three-phase overcurrent protection relay is particularly suitable for use in non-fused

Medium Voltage cubicals or compartments in transformer or distribution stations where there

are no auxiliary power-supply batteries.

3.- OPERATION

The PIE-3N relay is used in conjunction with 3 transformers of type IFG-8, IFG-7, AGD-12

or AGD-24, whichever is most suitable, which allow the phase- and homopolar line currents

to be measured and which supply the power required for the relay's circuits and the external

trip coil. As a result, no auxiliary power supply is required.


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The current transformers used with this relay have the following characteristics:

TRANSFORMER

MODEL

TRANSFORMER

TERMINALS

TRANSFORMER

RATIO

C-D TEST WINDING

TRANSFORMAER

RATIO

IFG-8 S1 - S2

S1 - S3

14.5 / 0.5

29 / 0.5

0.5 / 0.5

0.5 / 0.25

IFG-7 S1 - S2

S1 - S3

58 / 0.5

116 / 0.5

0.5 / 0.5

0.5 / 0.25

AGD-12 S1-S2

S1-S3

S1-S4

S1-S5

14.5 / 0.5

29 / 0.5

58 / 0.5

116 / 0.5

AGD-24 S1-S2

S1-S3

S1-S4

S1-S5

14.5 / 0.5

29 / 0.5

58 / 0.5

116 / 0.5

Transformers of other sizes or ratios can be supplied on demand.

4.- ADJUSTMENT

The following independent settings or trip-points are available on the front panel of the PIE-3N relay:

- Phase overcurrent (51) I>

- Phase overcurrent time delay t I>

- Phase short-circuit (50) I>>

- Phase short-circuit time delay t I >>

- Homopolar overcurrent (51N) I >

- Homopolar overcurrent time delay t I >

- Homopolar short-circuit (50N) I >>

- Homopolar short-circuit time delay t I >>

Any of the above functions with the exception of phase overcurrent (I>) can be annulled byselecting setting “0“ on the corresponding rotary switch.

The tables below show the available settings in terms of the nominal line current IN.


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SET POINT I> SET POINT DELAY SET POINT I>> SET POINT DELAY0 1 IN 0 40 ms 0 NO 0 40 ms1 1.1 IN 1 5 s 1 6 IN 1 100 ms2 1.2 IN 2 6 s 2 6.5 IN 2 200 ms3 1.3 IN 3 7 s 3 7 IN 3 300 ms4 1.4 IN 4 8 s 4 7.5 IN 4 400 ms5 1.5 IN 5 9 s 5 8 IN 5 500 ms6 1.6 IN 6 10 s 6 8.5 IN 6 600 ms7 1.7 IN 7 11 s 7 9 IN 7 700 ms8 1.8 IN 8 12 s 8 9.5 IN 8 800 ms9 1.9 IN 9 13 s 9 10 IN 9 900 msA 2 IN A 14 s A 10.5 IN A 1sB 2.1 IN B 15 s B 11 IN B 1,1 sC 2.2 IN C 16 s C 11.5 IN C 1,2 sD 2.3 IN D 17 s D 12 IN D 1,3 sE 2.4 IN E 18 s E 12.5 IN E 1,4 sF 2.5 IN F 19 s F 13 IN F 1,5 s

SET POINT I > SET POINT DELAY SET POINT I >> SET POINT DELAY0 NO 0 40 ms 0 NO 0 40 ms1 0,10 IN 1 5 s 1 1 IN 1 100 ms2 0,15 IN 2 6 s 2 1.1 IN 2 200 ms3 0.20 IN 3 7 s 3 1.2 IN 3 300 ms4 0.25 IN 4 8 s 4 1.3 IN 4 400 ms5 0.30 IN 5 9 s 5 1.4 IN 5 500 ms6 0.35 IN 6 10 s 6 1.5 IN 6 600 ms7 0.40 IN 7 11 s 7 1.6 IN 7 700 ms8 0.45 IN 8 12 s 8 1.7 IN 8 800 ms9 0.50 IN 9 13 s 9 1.8 IN 9 900 msA 0.55 IN A 14 s A 1.9 IN A 1sB 0.60 IN B 15 s B 2.0 IN B 1,1 sC 0.65 IN C 16 s C 2.1 IN C 1,2 sD 0.70 IN D 17 s D 2.2 IN D 1,3 sE 0.75 IN E 18 s E 2.3 IN E 1,4 sF 0.80 IN F 19 s F 2.4 IN F 1,5 s

When an overcurrent condition is detected in the line the PIE-3N relay waits until the set timedelay has expired and then sends a series of tripping pulses to the trip coil, which opens thecircuit breaker.

The series of pulses continues until either the primary current is interrupted or the faultcondition disappears.

The PIE-3N may also be powered from a 230 Vac supply. When this supply input is used, theprotection relay may be used for either three-phase or single-phase measurements as low as10% of IN (the minimum neutral adjustment).

There is also an external trigger input (for use with thermal triggers or Buchholz protectiondevices, for example) that requires 230 Vac at 50 Hz. The power supply must be connected inorder to use the external trigger input.


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Operation of the PIE-3N relay may be checked using the “C-D” test windings on the currenttransformers.

Adjusting the PIE-3N - An example

Before adjusting the relay, the following data is required:

- The nominal burden of the distribution transformer (eg.: 500 KVA).

- The nominal line voltage (eg.: 20 KV).

- The phase overcurrent rating of the transformer (eg.: 20% IN).

- The homopolar current rating of the transformer (eg.: 10% IN).

Phase protection

1.- Nominal current of the distribution transformer:

AIN 43.1420*3

500==

2.- Overcurrent rating:

1.2 * 14.43 = 17.32 A

3.- The IFG-8 current transformer will be suitable, using terminals S1-S2, whichhave an “In” value of 14.5 A.

19.15.14

32.17==

nII

The closest value in the adjustment selection table is 2.1=nII , trip point 2 in

the table, meaning that the real overcurrent trip point will be 1.2 * 14.5 = 17.4 A,

or, as a percentage: %58.20100*43.144.17

=


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Homopolar protection

To set the homopolar current trip to operate when this current exceeds 10% of IN, wecalculate the settings as follows:

10 % of IN = 0.1 x 14.43 = 1.443 A

099.05.14

443.1==

InI

To trigger the relay when the homopolar current is greater than 10% of IN, we mustselect the closest entry in the table, which in this case is 0.10 IN, trip point 1, whichwill give us a real homopolar trip current of 0.10 x 14.5 = 1.45 A, or, in percentage

terms: %05.1010043.14

45.1=×


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5.- TECHNICAL CHARACTERISTICS

General data

- Type: PIE-3N

- Maintenance: Maintenance-free

- Duty cycle: Continuous

- Mounting position: Any

Measurement circuit

- Nominal current: IN = 0.5 A

- Maximum continuous current: I = 4 IN

- Maximum current during 1 s.: I = 100 IN

- Minimum current: 40% IN Three-phase95% IN Single-phase

- Frequency: 50 - 60 Hz

Adjustment ranges

- Phase overcurrent (I >) (51): 1 ÷ 2.5 IN in steps of 0.1 IN

- Phase short-circuit (I >>) (50): 6 ÷ 13 IN in steps of 0.5 IN

- Homopolar overcurrent (I >) (51N): 0.1 ÷ 0.8 IN in steps of 0.05 IN

- Homopolar short-circuit (I >>) (50N): 1 ÷ 2.4 IN in steps of 0.1 IN

- Delay time for (I >): 5 ÷ 19 s. in steps of 1 s.

- Delay time for (I >>): 100 ms. ÷ 1.5 s. in steps of 100 ms.

- Delay time for (I >): 5 ÷ 19 s in steps of 1 s.

- Delay time for (I >>): 100 ms. ÷ 1.5 s. in steps of 100 ms.

220 V ac input and external trigger

- Nominal voltage: 230 Vac

- Operating range: + 10 %; - 20 % UN

- Consumption: 6 VA at 230 Vac


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- Operating time: 5 ms.

Output pulses

- Pulse repetition period:

- Without auxiliary power Depends on the primary current (see graph)

- With 230 Vac supply ≤ 60 ms

Precision

- Accuracy in measurement at end scale: < 5 %

- Timing accuracy at end scale: < 5 %

- Repetition: < 1 %

Operating temperature

- Storage temperature range: + 85º ÷ - 40 º C

0

0,05

0,1

0,15

0 2 4 6 8 10 12 14

I / IN

Puls

es fr

eque

ncy

(s.)


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- Operating temperature range: + 55º ÷ -10º C

Indicators

- Flashing green LED shows protection relay is operative

- Four red LEDs indicate the fault conditions that caused triggering.

Housing

- Material: NORYL

- Dimensions (w x h x d.): 72 x 144 x 162 mm.

- Mounting: Flush mounting

- IP: IP 65

Transformers

- Standards: VDE 0414-1/94

CEI 60044-1/1996

- Housing: Resin casting

- Operating voltage (Vo): 2 V

- Operating current (Io): ≤ 80 mA

- Nominal frequency: 50 to 60 Hz

- Nominal secondary current: 0.5 A

- Continuous load: 2.5 IN

- C-D test winding: 1 A continuous (Only IFG models)

- Thermal withstand current: 100 IN

- Dynamic withstand current: 250 IN

IFG-7 0.72 KV

IFG-8 0.72 KV

AGD-12 12 KV

- Operating voltage:

AGD-24 17.5 – 24 KV


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IFG-7 3 KV

IFG-8 3 KV

AGD-12 28 KV

- Test voltage:

AGD-24 38 – 50 KV

- Insulation class: E

- Operating temperature: -5ºC ÷ + 40ºC

- Altitude: maximum 3,000 m above avg. sea level

- Attachment points: in the base


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6.- RECEIPT AND STORAGE

The PIE-3N relay is shipped in its box complete with the corresponding transformers. This

packing guarantees its safety under normal handling conditions for this type of equipment.

If it is not to be installed immediately, it should be stored in its packing, unopened and in anenvironment that may be considered as "interior", away from rain, dust, vibrations, etc.

If the packing is seen to be damaged or any damage is suspected due to rough handling duringtransport, the manufacturer and the insurance company should be informed immediately.

7.- MOUNTING INSTRUCTIONS

The instructions given below will provide optimum results from the PIE-3N, avoiding anyrisks due to incorrect installation.

7.1. INSPECTION

Remove the PIE-3N from its packing and inspect it visually, looking for possible damage thatmay have been caused during transport.

7.2. CHECKING THE NOMINAL CHARACTERISTICS

Check that the transformers supplied with the PIE-3N relay are of the type ordered.

Following this, install the relay in the panel cut-out, which should have been preparedpreviously. Once the unit is fixed into the panel, no other mechanical operations should beperformed on either the relay or the panel.


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7.3.CHECKING THE EXTERNAL CIRCUITS.

Once attached to the panel, the connections must be made to the relay's external terminals, asshown in the diagram below. The rear terminals are identified by numbers:

ExternalTrigger Input230 Vac


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8.- EXTERNAL CONNECTIONS

TERMINALS CONNECTION1; 2 Phase R current measurement. Output, Input.3; 4 Phase S current measurement. Output, Input.5; 6 Phase T current measurement. Output, Input.8; 9 Auxiliary 220 Vac. Supply input

11; 12 Output to trip coil or release mechanism. 11(+), 12(-)13; 14 External trigger input. 220 Vac.

1234567891011121314


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9.- DIMENSIONS

PANEL MOUNTING

PANEL CUT-OUT


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10.- TRANSFORMERS


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PIE 3N Ingles

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