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5.4 PHASE-TO-PHASE ZONE REACH TESTING
1. Protection Settings:
Z1DISTANCE
(101)
Z1PHASE = NO
(104)
Z1GROUND = NO
Z2DISTANCE
(201)
Z2PHASE = NO
(204)
Z2GROUND = NO
Z3DISTANCE
(301)
Z3PHASE = NO
(304)
Z3GRND = NO
Z4DISTANCE
(401)
Z4PHASE = YES
(405)
Z4GRND = NO
(410)
Z4P_TIME = 0.1
(411)
Z4G_TIME = 0.1
OVERCUR
(601)
50 = NO
(605)
50G = NO
5
(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 5–7 for
the appropriate phase under test. Set the relay to test mode 33 (Any Zone 4 Phase). The LUI displays:
ANY Z4 PHASE ON
3. Set the voltage inputs as follows: VA: 67 V rms ∠0°, VB: 67 V rms ∠–120°, VC: 67 V rms ∠+120°.
4. Set the fault current, I
out of phase with the line to which it is shorted. (increase VA, VB, and VC to 75 V when ∠ I
I Degrees
–25
–55
–85
†
Reference only
5. Set the fault current to 3.3 (0.7) amps rms. Simultaneously reduce the voltages of the faulted phases and
check that the A1 contact closes when the voltages are within the limits shown above.
6. Reduce the fault current to zero. Note that the trip target indication concurs with the fault. For example, an
AB fault is displayed as follows:
TRIP AB Z4 "DIST"
where "DIST" is the displayed target.
7. Repeat the test for phase BC and CA faults.
5-
20
, to the phase-angle value listed below. Note that the leading phase angle is 180°
op
Volts rms
Displayed Target
56 to 63
64 to 72
290 to 310
56 to 63
LPS-D Line Protection System
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
5.4.4 T19 – ZONE 4 PHASE REACH, M4 FAULTS
†
–
–
= –55°).
op
GE Power Management
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