GE 469

7-2 469 Motor Management Relay GE Power Management
7.2 HARDWARE FUNCTIONAL TESTING 7 TESTING
7
7.2 HARDWARE FUNCTIONAL TESTING 7.2.1 PHASE CURRENT ACCURACY TEST
The 469 specification for phase current accuracy is
±
0.5% of 2
×
CT when the injected current is less than
2
×
CT. Perform the steps below to verify accuracy.
1. Alter the following setpoint:
S2 SYSTEM SETUP\CURRENT SENSING\PHASE CT PRIMARY: 1000A
2. Measured values should be
±
10 A. Inject the values shown in the table below and verify accuracy of the
measured values. View the measured values in:
A2 METERING DATA\CURRENT METERING
7.2.2 VOLTAGE INPUT ACCURACY TEST
The 469 specification for voltage input accuracy is
±
0.5% of full scale (273 V). Perform the steps below to ver-
ify accuracy.
1. Alter the following setpoints:
S2 SYSTEM SETUP\VOLTAGE SENSING\VT CONNECTION TYPE: Wye
S2 SYSTEM SETUP\VOLTAGE SENSING\VOLTAGE TRANSFORMER RATIO: 10.00:1
2. Measured values should be
±
13.65 V. Apply the voltage values shown in the table and verify accuracy of
the measured values. View the measured values in:
A2 METERING DATA\VOLTAGE METERING
Table 7–1: PHASE CURRENT TEST
INJECTED
CURRENT
1 A UNIT
INJECTED
CURRENT
5 A UNIT
EXPECTED
CURRENT
READING
MEASURED
CURRENT
PHASE A
MEASURED
CURRENT
PHASE B
MEASURED
CURRENT
PHASE C
0.1 A 0.5 A 100 A
0.2 A 1.0 A 200 A
0.5 A 2.5 A 500 A
1.0 A 5.0 A 1000 A
1.5 A 7.5 A 1500 A
2.0 A 10 A 2000 A
Table 7–2: INPUT VOLTAGE TEST
APPLIED
LINE-NEUTRAL
VOLTAGE
EXPECTED
VOLTAGE
READING
MEASURED
VOLTAGE A-N
MEASURED
VOLTAGE B-N
MEASURED
VOLTAGE C-N
30 V 300 V
50 V 500 V
100 V 1000 V
150 V 1500 V
200 V 2000 V
270 V 2700 V