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7-12 489 Generator Management Relay GE Multilin
7.3 ADDITIONAL FUNCTIONAL TESTS 7 TESTING
7
7.3.4 VOLTAGE PHASE REVERSAL ACCURACY
The can detect voltage phase rotation and protect against phase reversal. To test the phase reversal element, perform the
following steps:
1. Alter the following setpoints:
S2 SYSTEM SETUP ÖØ VOLTAGE SENSING Ö VT CONNECTION TYPE: "Wye"
S2 SYSTEM SETUP ÖØ GEN. PARAMETERS ÖØ GENERATOR PHASE SEQUENCE: "ABC"
S3 DIGITAL INPUTS Ö BREAKER STATUS Ö BREAKER STATUS: "Breaker Auxiliary a"
S6 VOLTAGE ELEMENTS ÖØ PHASE REVERSAL Ö PHASE REVERSAL TRIP: "Unlatched"
S6 VOLTAGE ELEMENTS ÖØ PHASE REVERSAL ÖØ ASSIGN TRIP RELAYS: "1---"
2. Apply voltages as per the table below. Verify the operation on voltage phase reversal
7.3.5 INJECTION TEST SETUP #2
Setup 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
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
PHASEa PHASEb PHASEc PHASE APHASE BPHASE 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 ENDCT's
OUTPUT CT's
PHASE
VOLTAGEINPUTS
G10
H3 H6G5 G8 H2
808817A1.CDR
G9
50:0.25
NC NC
H10
G4 G7 G2H5 H8G1
AUTOMATICCT
SHORTING
BAR
V
C
V
A
V
B