GE ALPS - T13 - Zone 2 Ground Reach, Mtg Ground Faults

GE Power Management
ALPS Advanced Line Protection System 6-13
6 FUNCTIONAL TESTS (USER SETTINGS) 6.5 ZONE REACH TESTS
6
6.5.4 T13 – ZONE 2 GROUND REACH, MTG GROUND FAULTS
1. Protection Settings:
Z2DISTANCE
(201) Z2PHASE = NO
(204) Z2GROUND = YES
(206) Z2GRDREACH = [_________] ohms,
V
NOM 2
= [_________] V,
I
T
= [_________] A,
øI
2
= [_________]°,
2. Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–12 for the appro-
priate phase under test.
3. Set the relay to the Zone 2 ground test mode for the appropriate phase under test. The LUI displays, for instance,
ZONE 2 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 con-
tact closes when the voltage is within 7% of
V
NOM
.
7. Reduce the fault current to zero.
8. Return Zone 2 phase, Z2PHASE, to your specific setting.
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 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 con-
tact 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.