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GE Power Management
LPS-D Line Protection System
5-
13
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
5.3 ZONE REACH AND TIMER TESTS
5
5.3.4 T13 – ZONE 3 GROUND REACH, M3G GROUND FAULTS
1.
Setting:
Z1DISTANCE
(101)
Z1PHASE = NO
(104)
Z1GROUND = NO
Z2DISTANCE
(201)
Z2PHASE = NO
(204)
Z2GROUND = NO
Z3DISTANCE
(301)
Z3PHASE = NO
(304)
Z3GRND = YES
Z4DISTANCE
(401)
Z4PHASE = NO
(405)
Z4GRND = NO
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 test mode 16 (Any Z3 Ground). The LUI displays:
ANY Z3 GRND ON
4.
Set the voltage inputs to the following values:
VA: 67 volts rms
∠
0°,
VB: 67 volts rms
∠
–120°,
VC: 67 volts rms
∠
+120°.
5.
Set the fault current,
I
op
, to the phase-angle value listed below (Increase VA, VB, and VC to 75V when
∠
I
op
= – 79°).
6.
Set the fault current to 3.5 (0.7) amps rms. Reduce the voltage of the faulted phase and check that the A1
contact closes when the voltage is within the limits above.
7.
Reduce the fault current to zero. Note that the trip target indication concurs with the fault. An AG fault will
be displayed as follows:
TRIP: AG Z3 "DIST"
where “DIST” is the displayed target.
8.
Repeat the test for phase BG and CG faults.
∠
I Degrees
Volts rms
Displayed Target
†
–49
57 to 64
–
–79
66 to 73
195 to 205
–109
57 to 64
–
†
Reference only
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 ...