GE GEK 106168E Relay Measurement Tests, Current Measurement, Timing Measurement, Acceptance Tests

6. ACCEPTANCE TESTS

6.10. RELAY MEASUREMENT TESTS

6.10.1. CURRENT MEASUREMENT

1.Change setpoint GENERAL/FUNCTION PERMIT/50BF 1P FUNCTION to PER.

2.Change setpoint GENERAL/FUNCTION PERMIT/50BF 3P FUNCTION to NO PER.

3.Change setpoint GENERAL/FUNCTION PERMIT/3P No INT FUNCT to NO PER.

4.Change setpoint TABLE 1/50BF SETTINGS/PH LOSET PICKUP to 5A (1A in relays with 1A nominal current).

5.Change setpoint TABLE 1/50BF SETTINGS/1 PHASE TIMER T1 to 0.050s.

6.Change setpoint TABLE 1/50BF SETTINGS/Nº OUTPUT STAGES to 1.

7.Energize digital input 3POLE BF INITIATE (terminals E7-E8 for relays with expansion board). If the relay has not expansion board, energize CC1 PHASE A BF INITIATE.

8.Increase current applied on A1-A2 (phase A) until contact A12-B12 closes. Check that the operating value of the current is within ± 5% of setpoint (5A for relays with 5A nominal current and 1A for 1A nominal current relays).

9.Repeat step 8 applying current on B1-B2 (phase B). If the relay has not an expansion board energize CC2

PHASE B BF INITIATE.

10.Repeat step 8 applying current on A3-A4 (phase C). If the relay has not an expansion board energize CC3

PHASE C BF INITIATE.

6.10.2. TIMING MEASUREMENT

1.Connect the stop input of the precision timer to the A12-B12 output (trip 1).

2.Apply the operating current level of the previous test to terminals A1-A2 (phase A).

3.Simultaneously energize the digital input 3POLE BF INITIATE and the starting input of the precision timer.

4.After 1 PHASE TIMER T1 (0.050s) the relay will trip.

5.Verify that the actual operating time is equal to 1 PHASE TIMER T1 (accuracy ± 5% or 30 ms, whichever is greater).

GEK-106168E DBF Breaker Failure Protection 37