Reactive Power Accuracy - GE 489 Instruction Manual

7 TESTING
The specification for reactive power is ±1% of
verify accuracy and trip element.
1. Alter the following system setpoints:
S2 SYSTEM SETUP CURRENT SENSING
S2 SYSTEM SETUP VOLTAGE SENSING
S2 SYSTEM SETUP VOLTAGE SENSING
S2 SYSTEM SETUP GEN. PARAMETERS
S2 SYSTEM SETUP GEN. PARAMETERS
S2 SYSTEM SETUP GEN. PARAMETERS
The rated reactive power is
2. Alter the following reactive power setpoints:
S7 POWER ELEMENTS REACTIVE POWER
S7 POWER ELEMENTS REACTIVE POWER
S7 POWER ELEMENTS REACTIVE POWER
S7 POWER ELEMENTS REACTIVE POWER
S7 POWER ELEMENTS REACTIVE POWER
S7 POWER ELEMENTS REACTIVE POWER
S7 POWER ELEMENTS REACTIVE POWER
S7 POWER ELEMENTS REACTIVE POWER
S7 POWER ELEMENTS REACTIVE POWER
S7 POWER ELEMENTS REACTIVE POWER
S7 POWER ELEMENTS REACTIVE POWER
3. Inject current and apply voltage as per the table below. Verify the alarm/trip elements and the accuracy of the mea-
sured values. View the measured values in:
A2 METERING DATA POWER METERING
4. View the Event Records in
CURRENT/
VOLTAGE
EXPECTED TOLERANCE MEASURED EXPECTED OBSERVED
Vab=120V∠0°
Vbc=120V∠120°lag
Vca=120V∠240°lag
18
Ian=5 A∠10°lag
Ibn=5 A∠130°lag
Icn=5 A∠250°lag
Vab=120V∠0°
Vbc=120V∠120°lag
Vca=120V∠240°lag
–35
Ian=5 A∠340°lag
Ibn=5 A∠100°lag
Icn=5 A∠220°lag
Vab=120V∠0°
Vbc=120V∠120°lag
Vca=120V∠240°lag
–52
Ian=5 A∠330°lag
Ibn=5 A∠90°lag
Icn=5 A∠210°lag
Vab=120V∠0°
Vbc=120V∠120°lag
Vca=120V∠240°lag
52
Ian=5 A∠30°lag
Ibn=5 A∠150°lag
Icn=5 A∠270°lag
: Activated, : Not Activated
GE Multilin
3 × 2 × CT × VT × VT
PHASE CT PRIMARY:
VT CONNECTION TYPE:
VOLTAGE TRANSFORMER RATIO:
GENERATOR RATED MVA:
GENERATOR RATED POWER FACTOR:
GENERATOR VOLTAGE PHASE-PHASE:
1
–
100 sin ( cos ( 0.85 ) ) ± 52.7 Mvar
=
REACTIVE POWER ALARM:
ASSIGN ALARM RELAYS(2-5):
POSTIVE Mvar ALARM LEVEL:
NEGATIVE Mvar ALARM LEVEL:
REACTIVE POWER ALARM DELAY:
REACTIVE POWER ALARM EVENT:
REACTIVE POWER TRIP: "
ASSIGN TRIP RELAYS(1-4):
POSTIVE Mvar TRIP LEVEL:
NEGATIVE Mvar TRIP LEVEL:
REACTIVE POWER TRIP DELAY:
A5 EVENT RECORD
MVAR
13 to 23
–40 to –30
–57 to –47
47 to 57
489 Generator Management Relay
7.3 ADDITIONAL FUNCTIONAL TESTS

7.3.3 REACTIVE POWER ACCURACY

at I < 2 × CT. Perform the steps below to
full scale avg
"5000"
"Wye"
"100:1"
"100"
"0.85"
"12000"
.
"Unlatched"
"---5"
"0.6 x Rated"
"0.6 x Rated"
"5 s"
"On"
Unlatched"
"1---"
"0.75 x Rated"
"0.75 x Rated"
"10 s"
ALARM
DELAY EXPECTED OBSERVED
N/A
TRIP
DELAY
7
N/A
N/A
7-11