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5.2 MEASURING UNIT TESTS
1.
Protection settings:
OVERCURRNT
(601)
50 = YES
(602)
50_DIRCNL = NO
(603)
50PICKUP = 5.0 (1.0)
2.
Connect the relay as shown in Figure 5–1: PHASE-TO-PHASE TEST CONNECTIONS on page 5–6 for a phase AB,
BC, or CA fault. Note that the leading phase is 180 degrees out of Phase with the line to which it is shorted.
3.
Set the relay into test mode 43 (Phase Overcurrent). The LUI should display INST PHS OVRC ON
Set I
to 2.8 (0.6) A rms and apply to the relay. The A1 contact should close. Lower I
4.
op
point the A1 contact should open.
Reduce I
5.
to 0 A.
op
6.
Restore the following Protection settings
OVERCURRNT
(602)
50_DIRCNL = YES
(603)
50PICKUP = 20.0 (4.0) Amps
1.
Protection settings:
5
OVERCURRNT
(605)
50G = YES
(606)
50G_DIRCNL = NO (Directnl ctrl off)
(607)
50GPICKUP = 2.5 (0.5) Amps
(609)
50GRESTNT = 0
2.
Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–12.
3.
Set the relay into test mode 44 (Ground Overcurrent). The LUI displays INST GND OVRC ON
Set I
to 4.0 (0.80) A rms and apply to the relay. The A1 contact should close. Lower I
4.
op
point the A1 contact should open.
5.
Reduce I
to zero.
op
6.
Restore the following settings
OVERCURRNT
(605)
50G_DIRCNL = YES
(605)
50GPICKUP = 10 (2.0) Amps
1.
Record the pre-test values for Protection Settings 610, 611, 612, 614, and 615. and make the following changes:
OVERCURRNT
(610)
51G = YES
(611)
51G_DIRCNL = NO (direct ctrl off)
(612)
51GPICKUP = 1.0 (0.2) Amps
(614)
51GCURVE = V-INV
(615)
51GTIMDIAL = 5.0
2.
Connect the relay as shown in Figure 5–2: GROUND REACH TIMER TEST CONNECTIONS on page 5–7.
Start the timer when I
NOTE
5-4
5.2.6 T6 – PHASE INSTANTANEOUS OVERCURRENT 50
5.2.7 T7 – GROUND INSTANTANEOUS OVERCURRENT 50G
is applied, and stop the timer when A1 closes (the relay trips).
op
ALPS Advanced Line Protection System
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
to 2.0 (0.4) A rms, at which
op
to 2.4 (0.40) A rms, at which
op
5.2.8 T8 – GROUND TIME OVERCURRENT 51G
GE Power Management
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