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5.3 ZONE REACH AND TIMER TESTS
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 AG 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) 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) A rms to the relay and start the Precision Timer (the fault current should not be
ramped, but 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 Zone 3 trip, such as: TRIP 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
5
(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 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 Zone 4 trip, such as: TRIP 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.
5-12
ALPS Advanced Line Protection System
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
GE Power Management
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