Demand Monitoring - GE 750 Instruction Manual

750/760
Feeder Management Relay

Demand Monitoring

7–38
6. Program the test set with the following fault voltages and currents. This fault is
Phase C to ground, placed 7.0 km from the relay.
V = 67.4∠2°; V = 67.4∠242°; V
an bn
210°; I = 9.9∠47°
c
7. Inject the prefault voltages and currents, then apply the fault. The relay should
trip and determine the type of fault (C-G), the distance to the fault (7.0 km)
and the reactance to the fault (3.82
8. Program the test set with the following fault voltages and currents. This fault is
Phase A to C, 8.0 km from the relay.
V = 60.4∠4°; V = 67.4∠242°; V
an bn
210°; I = 11.4∠73°
c
9. Inject the prefault voltages and currents, then apply the fault parameters. The
relay should trip and determine the type of fault (A-C), the distance to the fault
(8.0 km) and the reactance to the fault (4.36
10. Program the test with the following fault voltages and currents. This fault is
Phase A to B, placed 9.0 km from the relay.
V = 62.2∠358°; V
an bn
10.3∠133°; I = 2.9∠90°
c
11. Inject the prefault voltages and currents, then apply the fault. The relay should
trip and determine the type of fault (A-B), the distance to the fault (9.0 km) and
the reactance to the fault (4.91
12. Program the test with the following fault voltages and currents. This fault is
Phase A to B to C, 10.0 km from the relay.
V = 60.3∠0°; V = 60.3∠240°; V
an bn
10.8∠163°; I = 10.8∠43°
c
13. Inject the prefault voltages and currents, then apply the fault. The relay should
trip and determine the type of fault (A-B-C), the distance to the fault (10.0 km)
and the reactance to the fault (5.45
a) Current Demand
To test Current Demand, use the test connections specified in FIGURE 7–1: Relay
Test Wiring – Wye Connection or FIGURE 7–2: Relay Test Wiring – Delta Connection
on page 7–4. The Indications and Operations are as outlined for Phase TOC 1 on
page 7–18, except that this element has no Trip function.
1. Clear demand data registers before starting this test.
2. Inject a fixed value of current. Monitor the actual value of the measured
demand, and note the level at which the feature generates an output. Turn the
current off.
b) Real Power Demand
To test Real Power Demand, use the test connections specified in FIGURE 7–1: Relay
Test Wiring – Wye Connection or FIGURE 7–2: Relay Test Wiring – Delta Connection
on page 7–4. The Indications and Operations are as outlined for Phase TOC 1 on
page 7–18, except that this element has no Trip function.
1. Clear demand data registers before starting this test.
2. Inject a fixed value of watts. Monitor the actual value of the measured demand,
and note the level at which the feature generates an output. Turn the current
off.
c) Reactive Power Demand
To test Reactive Power Demand, use the test connections specified in FIGURE 7–1:
Relay Test Wiring – Wye Connection or FIGURE 7–2: Relay Test Wiring – Delta
Connection on page 7–4. The Indications and Operations are as outlined for Phase
TOC 1 on page 7–18, except that this element has no Trip function.
http://www.GEmultilin.com
= 61.3∠120°; I
cn
).
Ω
= 61.7∠117°; I
cn
).
Ω
= 61.0∠244°; V = 67.4∠122°; I
cn
).
Ω
= 60.3∠120°; I
cn
).
Ω
Monitoring
= 2.9∠330°; I = 2.9∠
a b
= 11.4∠253°; I = 2.9∠
a b
= 10.3∠313°; I =
a b
= 10.8∠283°; I =
a b
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