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5 FUNCTIONAL TESTS (FACTORY SETTINGS)
6.
Apply the fault current at 6.7 (1.4) 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 AB fault that is within pickup of all four zones.
7.
Stop the timer when the A1 contact closes, and reduce the fault current to zero. Verify that the trip target indication
shows a Zone 2 trip, such as: TRIP AB Z2. This verifies that the second zone tripped. The time for the trip should be in
the range 0.9 to 1.1 seconds.
8.
Leave the voltages at the values of step 4.
b) ZONE 3 TIMER
9.
Settings:
Z2DISTANCE
(201)
Z2PHASE = NO
(204)
Z2GROUND = NO
OUTPUTS
(2007)
A1 = Z3PTMR; Index 133
10. Apply the fault current at 5.0 (1.0) 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 AB fault that is within pickup of all four zones.
11. Stop the timer when the A1 contact closes, and reduce the fault current to zero. Verify that the trip target indication
shows a Zone 3 trip, such as: TRIP AB Z3. This verifies that the third zone tripped. The time for the trip should be in
the range 2.9 to 3.1 seconds.
12. Leave the voltages at the values in step 4.
c) ZONE 4 TIMER
13. Settings:
Z3DISTANCE
(301)
Z3PHASE = NO
(304)
Z3GRND = NO
OUTPUTS
(2007)
A1= Z4PTMR; Index 134
14. Apply a fault current of 3.3 (0.7) 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.
15. Stop the timer when the A1 contact closes, and reduce the fault current to zero. Verify that the trip target indication
shows a Zone 4 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.
16. If not continuing with MOB testing, return all settings to their pre-test values.
GE Power Management
ALPS Advanced Line Protection System
5.4 PHASE-TO-PHASE ZONE REACH TESTING
5
5-17
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