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5.3 ZONE REACH AND TIMER TESTS
1. Protection settings:
Z1DISTANCE
(101)
Z1PHASE = NO
(104)
Z1GROUND = NO
Z2DISTANCE
(201)
Z2PHASE = NO
(204)
Z2GROUND = YES
Z3DISTANCE
(301)
Z3PHASE = NO
(304)
Z3GRND = NO
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 15 (Any Zone 2 Ground). The LUI displays:
5
ANY Z2 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
V when ∠ I
= –79°).
op
∠I Degrees
–49
–79
–109
†
Reference only
6. Set the fault current to 4.6 (0.9) amps rms. Reduce the voltage of the faulted phase and check that the A1
contact closes when the voltage is within the limits in the table above.
7. Reduce the fault current to zero. Note that the trip target indication concurs with the fault. An AG fault is
displayed as
TRIP AG Z2 "DIST"
where "DIST" is the displayed target.
8. Repeat the test for BG and CG faults.
5-
12
5.3.3 T12 – ZONE 2 GROUND REACH, MTG GROUND FAULTS
, to the phase-angle value listed in the table below. (Increase VA, VB, and VC to 75
op
Volts rms
Displayed Target
56 to 63
65 to 72
56 to 63
LPS-D Line Protection System
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
†
–
146 to 154
–
GE Power Management
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