Ge 489 User Manual download pdf (Page 215)

GE Multilin 489 Generator Management Relay 7-3

7 TESTING 7.2 HARDWARE FUNCTIONAL TESTS

7.2HARDWARE FUNCTIONAL TESTS 7.2.1 OUTPUT CURRENT ACCURACY

The specification for output and neutral end current input 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 Ö CURRENT SENSING Ö PHASE CT PRIMARY: "1000 A"

2. Measured values should be ±10 A. Inject the values shown in the table below and verify accuracy of the measured val-

ues. View the measured values in:

A2 METERING DATA ÖØ CURRENT METERING

7.2.2 PHASE VOLTAGE INPUT ACCURACY

The specification for phase voltage input accuracy is ±0.5% of full scale (200 V). Perform the steps below to verify accu-

racy.

1. Alter the following setpoints:

S2 SYSTEM SETUP ÖØ VOLTAGE SENSING Ö VT CONNECTION TYPE: "Wye"

S2 SYSTEM SETUP ÖØ VOLTAGE SENSING ÖØ VOLTAGE TRANSFORMER RATIO: "10.00:1"

2. Measured values should be ±1.0 V. Apply the voltage values shown in the table and verify accuracy of the measured

values. View the measured values in:

A2 METERING DATA ÖØ VOLTAGE METERING

INJECTED CURRENT EXPECTED

CURRENT

MEASURED CURRENT

1 A UNIT 5 A UNIT PHASE A PHASE B 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 A 5 A 1000 A

1.5 A 7.5 A 1500 A

2 A 10 A 2000 A

APPLIED LINE-

NEUTRAL VOLTAGE

EXPECTED VOLTAGE

READING

MEASURED VOLTAGE

A-N B-N 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

1 2 ... 210 211 212 213 214 215 216 217 218 219 220 ... 258 259

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Ge 489 User Manual Page 215