4 voltage phase reversal accuracy, 5 injection test setup #2, Voltage phase reversal accuracy -12 – GE 489 User Manual
Page 224: Injection test setup #2 -12
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