GE LPS-O, Instruction Manual

Page: 139 / 308

GE Power Management LPS-O Line Protection System 5-
11
5 FUNCTIONAL TESTS (FACTORY SETTINGS) 5.3 PHASE-TO-PHASE ZONE REACH TESTING
5
where “DIST” is the displayed target.
7. Repeat the test for phase BC and CA faults.
5.3.2 T12 – ZONE 2 PHASE REACH TEST
1. Protection Settings:
Z1DISTANCE
(101) Z1PHASE = NO
Z2DISTANCE
(201) Z2PHASE = YES
(204) Z2TIMER = YES
(205) Z2P_TIME = 1.0 sec.
Z3DISTANCE
(301) Z3PHASE = NO
Z4DISTANCE
(401) Z4PHASE = NO
2. Connect the relay as shown in Figure 5–1: PHASE-TO-PHASE TEST CONNECTIONS on page 5–7 for
the appropriate phases under test. Set the relay to test mode 15 (Any Zone 2 Phase). The LUI displays:
ANY Z2 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
op
, to the phase-angle value listed in Table 5–3: FAULT CURRENT PHASE SET-
TINGS FOR TEST T12. 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
op
= –55°).
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 in Table 5–3: FAULT CURRENT PHASE
SETTINGS FOR TEST T12.
Table 5–3: FAULT CURRENT PHASE SETTINGS FOR TEST T12
∠
I Degrees Volts rms
Displayed Target
†
–25 57 to 64 –
–55 65 to 73 146 to 154
–85 57 to 64 –
†
Reference only