GE Power Management
ALPS Advanced Line Protection System 5-5
5 FUNCTIONAL TESTS (FACTORY SETTINGS) 5.2 MEASURING UNIT TESTS
5
3. For this test remove the relay from test mode and assign TOCTRP to A1.
(2007) A1 = index 119; TOCTRP
4. Apply
I
op
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
51G should time out in 2.8 to 3.2 seconds.
5. Reduce
I
op
to zero.
6. Repeat steps 3 and 4 with values for
I
op
from the table below. Verify that the 51G times out within the specified time.
7. Restore these Protection settings
OVERCURRNT
(610) 51G =
Pretest setting
(611) 51G_DIRCNL =
Pretest setting
(612) 51GPICKUP =
Pretest setting
(615) 51GTIMDIAL=
Pretest setting
OUTPUTS
(2007) A1 =
Pretest
setting
5.2.9 UNDERVOLTAGE TEST
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
op
to zero Amps.
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.
5.2.10 T9 – T10 – OVERVOLTAGE TEST
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
op
to zero Amps.
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.
I
OP
, A RMS 51G TIME OUT, S
3 2.8 to 3.2
6 0.9 to 1.1
10 0.6 to 0.8
To Next Page
Loading...
