GE Power Management
ALPS Advanced Line Protection System
5-3
5 FUNCTIONAL TESTS (FACTORY SETTINGS)
5.2 MEASURING UNIT TESTS
5
5.2.3 T3 – IB BLOCKING SUPERVISION TEST
1.
Setting:
Z4DISTANCE
(405)
Z4GRND = YES
CURSUPVISN
(502)
IB_PICKUP = 0.2 (0.04) A
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 35 (IB Detector). The LUI should display IB DETECTOR ON
4.
Set the voltages as follows:
VA = 67 V rms
∠
0°
VB = 67 V rms
∠
–120°
VC = 67 V rms
∠
+120°
5.
Set
I
op
to 0.30 (0.06) A rms and apply to the relay. The A1 contact should close. Lower
I
op
to 0.10 (0.02) A rms, at
which point the A1 contact should open.
6.
Reduce
I
op
to 0.
5.2.4 T4 – GROUND DIRECTIONAL TRIP TEST, IPT + NT
1.
Setting:
Z2DISTANCE
(204)
Z2GROUND = YES
(205)
Z2GRDCHAR = GDOC
CURSUPVIS
(503)
IPT_PICKUP = 0.5 (0.1) Amps
2.
Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–12.
3.
Set the voltages as follows:
VA = 55 V rms
∠
0°
VB = 67 V rms
∠
–120°
VC = 67 V rms
∠
+120°.
4.
Set the relay into test mode 36 (Ground Directional Trip). The LUI should display GRD DIR TRIP ON
5.
Set IA, the current of
I
op
, to 0.70 (0.14) A rms
∠
–85°, and apply to the relay. The A1 contact should close. Lower
I
op
to
0.40 (0.08) A rms, at which point the A1 contact should open.
6.
Reduce
I
op
to 0.
5.2.5 T5 – GROUND DIRECTIONAL BLOCK TEST, IPB + NB
1.
Settings:
CURSUPVIS
(504)
IPB_PICKUP = 0.25 (0.05) A
2.
Connect the relay as shown in Figure 4–3: PHASE TO GROUND TEST CONNECTIONS on page 4–12.
3.
Set VA to 55 V rms
∠
0°, VB to 67 V rms
∠
-120°, and VC to 67 V rms
∠
+120°.
4.
Set the relay into test mode 37 (Ground Directional Block). The LUI should display GRD DIR BLK ON
5.
Set IA, the current of
I
op
, to 0.40 (0.08) A rms
∠
–265° and apply to the relay. The A1 contact should close. Lower
I
op
to
0.15 (0.03) A rms, and the A1 contact should open.
6.
Reduce
I
op
to 0 A.