GE 489 - Manual (Page 224)

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
NE
UT
R
AL
1
A
H
G
F
1
A
/5A
1
A
/5A
1
A
/5A
1
A
/5A
1
A
/5A
1
A
/5A
C
OM
C
OM
C
OM
C
OM
C
OM
PHASE a PHASE b PHASE c PHASE A PHASE B PHASE C
C
OM
C
OM
C
OM V
a
V
b
V
com V
c
H9 G3 G6 H4 H7 H1 F10
A B C N A B C N
V V V V I I I I
3 PHASE VARIABLE AC TEST SET
GROUND INPUTS
NEUTRAL END CT's OUTPUT CT's
PHASE
VOLTAGE INPUTS
G10 H3 H6 G5 G8 H2
808817A1.CDR
G9
50:0.25
NC NC
H10 G4 G7 G2 H5 H8 G1
AUTOMATIC CT
SHORTING
BAR
VC
VA
VB