CHAPTER 7: TESTING
489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL 7–15
GENERATOR PHASE SEQUENCE: “ABC”
Z In the S3 DIGITAL INPUTS Z BREAKER STATUS menu, set:
BREAKER STATUS: “Breaker Auxiliary a”
Z In the S6 VOLTAGE ELEMENTS ZV PHASE REVERSAL menu, set:
PHASE REVERSAL TRIP: “Unlatched”
ASSIGN TRIP RELAYS: “1---”
Z Apply voltages as per the table below. Verify the operation on voltage
phase reversal
7.3.5 Injection Test Setup #2
Set up the 489 device as follows for the GE Multilin HGF Ground Accuracy Test, Neutral
Voltage (3rd Harmonic) Accuracy Test, and the Phase Differential Trip Test.
FIGURE 7–2: Secondary Injection Setup #2
7.3.6 GE Multilin 50:0.025 Ground Accuracy
The specification for GE Multilin HGF 50:0.025 ground current input accuracy is ±0.5% of
2 × CT rated primary (25 A). Perform the steps below to verify accuracy.
Z In the
S2 SYSTEM SETUP Z CURRENT SENSING menu, set:
Applied Voltage Expected Result Observed Result
Va = 120 V∠0°
Vb = 120 V∠120° lag
Vc = 120 V∠240° lag
No Trip
Va = 120 V∠0°
Vb = 120 V∠240° lag
Vc = 120 V∠120° lag
Phase Reversal Trip
E10
V
NEUTRAL
1A
HGF
1A/5A
1A/5A
1A/5A
1A/5A
1A/5A
1A/5A
COM
COM
COM
COM
COM
PHASE a PHASE b PHASE c PHASE A PHASE B PHASE C
COM
COM
COM
Va
Vb
Vcom
Vc
H9
G3 G6H4 H7 H1F10
AB C N
ABC N
VV V V
III I
3 PHASE VARIABLE AC TEST SET
GROUND INPUTS
NEUTRAL END CT's
OUTPUT CT's
PHASE
VOLTAGE INPUTS
G10
H3 H6G5 G8 H2
808817A1.CDR
G9
50:0.25
NC NC
H10
G4 G7 G2H5 H8 G1
AUTOMATIC CT
SHORTING
BAR
V
C
V
A
V
B
Courtesy of NationalSwitchgear.com
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