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5.4 PHASE-TO-PHASE ZONE REACH TESTING
Z3DISTANCE
(301)
Z3PHASE = NO
(304)
Z3GRND = NO
Z4DISTANCE
(401)
Z4PHASE = NO
(405)
Z4GRND = NO
OVERCURRNT
(601)
50 = NO
(605)
50G = NO
(610)
51G = NO
OS BLOCKING
(1603)
BLOCKWHAT = 3 (BLKNONE)
2.
Connect the relay as shown in Figure 5–1: PHASE-TO-PHASE TEST CONNECTIONS on page 5–6 for the appropri-
ate phases under test. Set the relay to test mode 31 (Any Zone 2 Phase). The LUI displays: ANY Z2 PHASE ON
Set the voltage inputs as follows: VA: 67 V rms ∠0°, VB: 67 V rms ∠–120°, VC: 67 V rms ∠+120°.
3.
4.
Set the fault current, I
with the line to which it is shorted (Increase VA, VB, and VC to 75 V when ∠ I
∠I DEGREES
–25
–55
–85
5
†
Reference only
5.
Set the fault current to 6.7 (1.4) amps rms. Reduce the voltages of the faulted phases and check that the A1 contact
closes when the voltages are within the limits shown above.
Reduce I
6.
of the faulted phase to zero. Note that the trip target indication concurs with the fault. For example, an AB
op
fault is displayed as follows: TRIP AB Z2 "DIST", where "DIST" is the displayed target.
7.
Repeat the test for phase BC and CA faults.
1.
Protection Settings:
Z1DISTANCE
(101)
Z1PHASE = NO
(104)
Z1GROUND = NO
Z2DISTANCE
(201)
Z2PHASE = NO
(204)
Z2GROUND=NO
Z3DISTANCE
(301)
Z3PHASE = YES
(304)
Z3GRND = NO
Z4DISTANCE
(401)
Z4PHASE = NO
(405)
Z4GRND = NO
OVERCURRNT
(601)
50 = NO
(605)
50G = NO
(610)
51G = NO
OS BLOCKING
(1603)
BLOCKWHAT = 3 (BLKNONE)
5-14
, to the phase-angle value listed below. Note that the leading phase angle is 180° out of phase
op
VOLTS RMS
DISPLAYED TARGET
57 to 64
–
65 to 73
146 to 154
57 to 64
–
ALPS Advanced Line Protection System
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
= –55°).
op
†
5.4.3 T18 – ZONE 3 PHASE REACH, M3 FAULTS
GE Power Management
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