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5.3 PHASE-TO-PHASE ZONE REACH TESTING
6. Reduce I
of the faulted phase to zero. Note that the trip target indication concurs with the fault. For
op
example, an AB 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. Setting:
Z1DISTANCE
(101)
Z1PHASE = NO
Z2DISTANCE
(201)
Z2PHASE = NO
Z3DISTANCE
(301)
Z3PHASE = YES
(304)
Z3P_TIME = 2.0 sec.
Z4DISTANCE
(401)
Z4PHASE = NO
5
LINEINFO
(1204) TRSFMRTYPE = NONE
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 16 (Any Zone 3 Phase). The LUI displays:
ANY Z3 PHASE ON
3. Set the voltage inputs to the following values:
VA: 67 volts rms ∠0°,
VB: 67 volts rms ∠–120°,
VC: 67 volts rms ∠+120°.
4. Set the fault current, I
TINGS FOR T13. Note that the leading phase angle is 180° out of phase with the line to which it is shorted
(increase VA, VB, and VC to 75 V when ∠ I
Table 5–4: FAULT CURRENT PHASE SETTINGS FOR T13
I Degrees
–25
–55
–85
†
Reference only
5-
12
, to the phase-angle value listed in Table 5–4: FAULT CURRENT PHASE SET-
op
= –55°)
op
Volts rms
Displayed Target
56 to 63
65 to 73
195 to 205
56 to 63
LPS-O Line Protection System
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
5.3.3 T13 – ZONE 3 PHASE REACH TEST
†
–
–
GE Power Management
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