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5 FUNCTIONAL TESTS (FACTORY SETTINGS)
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
OVERCUR
(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 5–7 for
the appropriate phase under test. Set the relay to test mode 32 (Any Zone 3 Phase). The LUI displays:
ANY Z3 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
op
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 5.0 (1.0) amperes 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:
TRIP: AB Z3 "DIST"
where "DIST" is the displayed target.
7. Repeat the test for phase BC and CA faults.
GE Power Management
, to the phase-angle value listed below. Note that the leading phase angle is 180°
Volts rms
Displayed Target
56 to 63
65 to 73
195 to 205
56 to 63
LPS-D Line Protection System
5.4 PHASE-TO-PHASE ZONE REACH TESTING
5.4.3 T18 – ZONE 3 PHASE REACH, M3 FAULTS
†
–
–
5
= –55°).
op
5-
19
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