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5.1 MEASURING UNIT TESTS
The Fault Detector responds to sudden changes in current levels. Slow changes are not picked up.
1. Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–16.
2. Set the relay into test mode 22 (the fault detector). The LUI displays
FAULT DETECTOR ON
3. Protection Settings:
Z1DISTANCE
(101)
Z2DISTANCE
(201)
Z3DISTANCE
(301)
Z4DISTANCE
(401)
OVERCURRENT
(601)
5
(605)
(610)
4. Set the voltages to zero.
5. Slowly increase I
rent to 0 A. The A1 contact should not close.
6. Immediately increase I
7. Immediately increase I
8. Reduce I
to 0.
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1. Protection Setting:
CURSUPVISN
(501)
IT_PICKUP = 0.25 (0.05) Amps
2. Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–16.
3. Set the relay into test mode 18 (IT Detector). The LUI displays:
IT DETECTOR ON
4. Set the voltages to zero.
5. Set I
to 0.35 (0.07) A rms and apply to the relay. The A1 contact should close. Lower I
op
rms, at which point the A1 contact should open.
6. Reduce I
to 0.
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5-
2
Z1PHASE = NO
Z2PHASE = NO
Z3PHASE = NO
Z4PHASE = NO
50 = NO
50G = NO
51G = NO
to 1.2 (0.24) A rms, at approximately 0.1 (0.02) A per second. Slowly decrease the cur-
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to 1.5 (0.3) A rms. The A1 contact should close momentarily.
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to 2.5 (0.5) A rms. The A1 contact should close until current is removed.
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LPS-O Line Protection System
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
5.1.2 T1 – FAULT DETECTOR TEST
5.1.3 T2 – IT TRIP SUPERVISION TEST
to 0.15 (0.03) A
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GE Power Management
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