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LPS-D Line Protection System
GE Power Management
5.3 ZONE REACH AND TIMER TESTS
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
5
b) ZONE3 TIMER
9.
Settings:
Z2DISTANCE
(201)
Z2PHASE = NO
(204)
Z2GROUND = NO
OUTPUTS
(2007) A1 = Z3GTMR; Index 130
10. Apply the fault current at 8.2 (1.6) amps rms to the relay and start the Precision Timer (the fault current
should not be ramped, but should be applied at the required level) This is an AG 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 ZONE3 trip, such as: AG 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 of step 4.
c) ZONE4 TIMER
13. Settings:
Z3DISTANCE
(301)
Z3PHASE = NO
(304)
Z3GRND = NO
OUTPUTS
(2007) A1 = Z4GTMR; Index 131
14. Apply the fault current at 8.2 (1.6) amps rms to the relay and start the Precision Timer (the fault current
should not be ramped, but should be applied at the required level). This is an AG fault that is 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 ZONE4 trip, such as: AG 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 you are not continuing with Phase Reach testing, return all settings to their pretest values.
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Страница 284: ...10 20 LPS D Line Protection System GE Power Management 10 8 HELP MENU 10 ALPS TEST PROGRAM 10 ...
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