Reactive Power Test - 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\PHASE CT PRIMARY:
S2 SYSTEM SETUP\VOLTAGE SENSING\VT CONNECTION TYPE:
S2 SYSTEM SETUP\VOLTAGE SENSING\VOLTAGE TRANSFORMER RATIO:
S2 SYSTEM SETUP\GEN. PARAMETERS\GENERATOR RATED MVA:
S2 SYSTEM SETUP\GEN. PARAMETERS\GENERATOR RATED POWER FACTOR:
S2 SYSTEM SETUP\GEN. PARAMETERS\GENERATOR VOLTAGE PHASE-PHASE:
The rated reactive power is
2. Alter the following reactive power setpoints:
S7 POWER ELEMENTS\REACTIVE POWER\REACTIVE POWER ALARM:
S7 POWER ELEMENTS\REACTIVE POWER\ASSIGN ALARM RELAYS(2-5):
S7 POWER ELEMENTS\REACTIVE POWER\POSTIVE Mvar ALARM LEVEL:
S7 POWER ELEMENTS\REACTIVE POWER\NEGATIVE Mvar ALARM LEVEL:
S7 POWER ELEMENTS\REACTIVE POWER\REACTIVE POWER ALARM DELAY:
S7 POWER ELEMENTS\REACTIVE POWER\REACTIVE POWER ALARM EVENT:
S7 POWER ELEMENTS\REACTIVE POWER\REACTIVE POWER TRIP:
S7 POWER ELEMENTS\REACTIVE POWER\ASSIGN TRIP RELAYS(1-4):
S7 POWER ELEMENTS\REACTIVE POWER\POSTIVE Mvar TRIP LEVEL:
S7 POWER ELEMENTS\REACTIVE POWER\NEGATIVE Mvar TRIP LEVEL:
S7 POWER ELEMENTS\REACTIVE POWER\REACTIVE POWER TRIP DELAY:
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 Power Management
× 2 × CT × VT × VT
3
1
–
( ( ) ) ±
100 sin cos 0.85 = 52.7 Mvar
A5 EVENT RECORD
MVAR

13 to 23

–40 to –30

–57 to –47

47 to 57
489 Generator Management Relay
7.3 ADDITIONAL FUNCTIONAL TESTING

7.3.3 REACTIVE POWER TEST

< 2 × CT. Perform the steps below to
at I
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

N/A

N/A


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