Undervoltage Test - GE ALPS Instruction Manual

5 FUNCTIONAL TESTS (FACTORY SETTINGS)
3. For this test remove the relay from test mode and assign TOCTRP to A1.
(2007) A1 = index 119; TOCTRP
4. Apply I at 3.0 (0.6) A rms and start the timer. Leave the current on until the A1 contact close and stop the timer. The
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51G should time out in 2.8 to 3.2 seconds.
5. Reduce I to zero.
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6. Repeat steps 3 and 4 with values for I
I , A RMS 51G TIME OUT, S
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3 2.8 to 3.2
6 0.9 to 1.1
10 0.6 to 0.8
7. Restore these Protection settings
OVERCURRNT
51G = Pretest setting
(610)
(611) 51G_DIRCNL = Pretest setting
(612) 51GPICKUP = Pretest setting
(615) 51GTIMDIAL= Pretest setting
OUTPUTS
(2007) A1 = Pretest setting
1. Connect the relay as shown in Figure 5–2: GROUND REACH TIMER TEST CONNECTIONS on page 5–7.
2. Set the voltage inputs to the following values:
VA: 67 volts rms ∠0°
VB: 67 volts rms ∠–120°
VC: 67 volts rms ∠+120°
3. Set I to zero Amps.
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4. Set the relay into test mode 48 The LUI displays UNDERVOLTAGE ON
5. Set phase A voltage to 35 V and check that contact A1 closed. Set phase A voltage back to 67 V and check that con-
tact A1 opens. Repeat for phase B and C.
1. Connect the relay as shown in Figure 5–2: GROUND REACH TIMER TEST CONNECTIONS on page 5–7 and make
the following Protection settings:
VOLTAGE
(701) RATEDVOLTS = 115 (V rms)
(702) PHASEOVER = YES
(703) PHOVPICKUP = 1.10 (pu Volts)
(704) PHOVTMDLY = 0.5
2. Set the relay into test mode 47. The LUI displays OVERVOLTAGE 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 I to zero Amps.
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5. Set phase A voltage to 74 V and check that contact A1 is closed. Set phase A voltage back to 67 V and check that con-
tact A1 opens. Repeat for phases B and C.
GE Power Management
from the table below. Verify that the 51G times out within the specified time.
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ALPS Advanced Line Protection System
5.2 MEASURING UNIT TESTS

5.2.9 UNDERVOLTAGE TEST

5.2.10 T9 – T10 – OVERVOLTAGE TEST
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