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5.3 PHASE-TO-PHASE ZONE REACH TESTING
d) ZONE4 TIMER
17. Settings:
Z3DISTANCE
(301)
Z3PHASE = NO
OUTPUTS
(2007) A1= Z4PTMR; Index 134
18. Apply a fault current of 10.0 (2.0) Amps rms to the relay and start the Precision Timer. The fault current
should not be ramped but applied at that level. This is an AG fault within pickup of all four zones.
19. Stop the timer when the A1 contact closes, and reduce the fault current to zero. Verify that the trip target
indication shows a ZONE4 trip, such as: TRIP AB Z4. This verifies that the fourth zone tripped. The time
for the trip should be in the range 4.8 to 5.2 seconds.
20. If not continuing with out-of-step block testing, return all settings to their pretest values.
5
5-
18
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
LPS-O Line Protection System
GE Power Management
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