GE Power Management
LPS-D Line Protection System
6-
15
6 FUNCTIONAL TESTS (USER SETTINGS)
6.5 ZONE REACH TESTS
6
6.5.5 T14 – ZONE 3 GROUND REACH, M3G GROUND FAULTS
1.
Protection Settings:
Z3DISTANCE
(301)
Z3PHASE = NO
(304)
Z3GRND = YES
(305)
Z3GRDREACH = [_________] ohms,
V
NOM
3
= [_________] V,
I
T
= [_________] A,
øI
3
= [_________]°
2.
Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–14 for
the appropriate phase under test.
3.
Set the relay to the Zone 3 ground test mode for the appropriate phase under test. The LUI displays, for
instance:
ZONE 3 AG ON
4.
Set the voltage inputs as follows: VA: 67 V rms
∠
0°, VB: 67 V rms
∠
–120°, VC: 67 V rms
∠
–240°.
5.
Set the fault current,
I
op
, phase angle to
øI
= [________]°, lagging.
6.
Set the fault current to
I
T
= [________] amps rms. Reduce the voltage of the faulted phase and check that
the A1 contact closes when the voltage is within 7% of
V
NOM
.
7.
Reduce the fault current to zero.
8.
Return Zone 3 phase, Z3PHASE, to your specific setting.
6.5.6 T15 – ZONE 4 GROUND REACH, M4G GROUND FAULTS
1.
Protection Settings:
Z4DISTANCE
(401)
Z4PHASE = NO
(405)
Z4GRND = YES
(406)
Z4GRDREACH = [_________] ohms,
V
NOM
4
= [_________] V,
I
T
= [_________] A,
øI
4
= [_________]°,
2.
Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–14 for
the appropriate phase under test.
3.
Set the relay to the Zone 4 ground test mode for the appropriate phase under test. The LUI displays, for
instance:
ZONE 4 AG ON
4.
Set the voltage inputs as follows: VA: 67 V rms
∠
0°, VB: 67 V rms
∠
–120°, VC: 67 V rms
∠
–240°.
5.
Set the fault current,
I
op
, phase angle to
øI
= [________]°, lagging.
6.
Set the fault current to
I
T
= [________] amps rms. Reduce the voltage of the faulted phase and check that
the A1 contact closes when the voltage is within 7% of
V
NOM
.
7.
Reduce the fault current to zero.
8.
Return Zone 4 phase, Z4PHASE, to your specific setting.
Summary of Contents for LPS-D
Page 2: ......
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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 ...