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GE Power Management
LPS-D Line Protection System
5-
21
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
5.4 PHASE-TO-PHASE ZONE REACH TESTING
5
5.4.5 T20 – PHASE (ZONE BACK-UP) TIMER TESTS
1.
For this test remove the relay from test mode.
2.
Record the pre-test values for all Protection settings used in this test.
3.
Protection Settings:
Z1DISTANCE
(101)
Z1PHASE= NO
(104)
Z1GROUND = NO
Z2DISTANCE
(201)
Z2PHASE = YES
(204)
Z2GROUND= NO
(209)
Z2P_TIME = 1.0
(210)
Z2G_TIME = 1.0
Z3DISTANCE
(301)
Z3PHASE = YES
(304)
Z3GRND = NO
(307)
Z3P_TIME = 3.0
(308)
Z3G_TIME = 3.0
Z4DISTANCE
(401)
Z4PHASE = YES
(405)
Z4GRND = NO
(410)
Z4P_TIME = 5.0
(411)
Z4G_TIME = 5.0
OVERCUR
(601)
50 = NO
(605)
50G = NO
(610)
51G = NO
OS BLOCKING
(1603) BLOCKWHAT = 3 (BLKNONE)
OUTPUTS
(2007) A1 = Z2PTMR; Index 132
a) ZONE2 TIMER
4.
Connect the relay as shown in Figure 5–3: PHASE-REACH TIMER TEST CONNECTIONS on page 5–23
for an AB fault.
5.
Set the voltage inputs as follows: VA: 55 V rms
∠
0°, VB: 55 V rms
∠
–120°, VC: 67 V rms
∠
+120°.
6.
Set the phase angle of the fault current,
∠
I
op
, to –55°.
7.
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.
8.
Stop the timer when the A1 contact closes, and reduce the fault current to zero. Verify that the trip target
indication shows a ZONE2 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.
9.
Leave the voltages at the values of step 4.
Summary of Contents for LPS-D
Page 2: ......
Page 4: ......
Page 226: ...7 4 LPS D Line Protection System GE Power Management 7 1 RATINGS 7 SPECIFICATIONS 7 ...
Page 284: ...10 20 LPS D Line Protection System GE Power Management 10 8 HELP MENU 10 ALPS TEST PROGRAM 10 ...
Page 412: ...C 34 LPS D Line Protection System GE Power Management C 3 POINT LISTS APPENDIXC C ...
Page 416: ...D 4 LPS D Line Protection System GE Power Management D 1 KEYPAD MENUS APPENDIXD D ...
Page 422: ...F 2 LPS D Line Protection System GE Power Management F 1 WARRANTY INFORMATION APPENDIXF F ...
Page 436: ...xiv LPS D Line Protection System GE Power Management INDEX INDEX ...