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10 FUNCTIONAL TESTS
10.3 COLLECTOR-RING MOTOR POWER FACTOR TEST
1. Connect the Va and Vb terminals of the 3-phase tester to SPM terminals B9 and B10 (control power and
PF voltage reference) respectively. Program for 120 V AC. To test the OPTIONAL PF REFERENCE input
connect Va and Vb to terminals A4 and A5 and 120 V AC to B9 and B10.
2. Connect Ic of the 3-phase tester terminals B3 and B4. Polarity is critical. Note: Ia and Ib outputs of 3q
tester may have to be shorted if they cannot be turned off. Program for 4A.
3. Connect the function generator's output (AC sinewave 5 to 10 V) to the VF terminals A18 and A19. Set to
3 Hz.
4. Connect the Switch to terminals A11 and A12 of the SPM (MX input). Close switch.
5. Connect multimeter to TRIP relay outputs to monitor relay status.
a) CONFIGURATIONS
Program as defaults shown in Section 5.4: CONFIGURATIONS MENU on page 5–12 except for following
exceptions
•
MOTOR: Collector-Ring
•
PF REF: External (if testing the external PF volt-age reference)
b) SETPOINTS
Program as defaults shown in 5.2: SETPOINTS MENU on page 5–2.
1. Apply control power to relay and wait for self-test diagnostic to complete. Should get SPM READY mes-
sage and TRIP relay should close.
2. Turn on current source and function generator.
3. Open MX switch
4. FAR contact should close followed by FCX contact. FIELD IS APPLIED message should momentarily flash
on screen.
5. PF metered value will now be displayed along with other metered values.
6. Vary voltage angle as in table below and check PF reading.
Table 10–2: COLLECTOR-RING MOTOR PF TEST RESULTS
ANGLE
EXPECTED PF
0°
25°
65°
317°
341°
GE Multilin
Courtesy of store.ips.us
10.3 COLLECTOR-RING MOTOR POWER FACTOR TEST
ACTUAL PF
1
0.9
0.4
–0.74
–0.95
SPM Synchronous Motor Protection and Control
10.3.1 SETUP
10.3.2 RELAY PROGRAMMING
10.3.3 TEST
10
10-
3
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