GE 489

GE Power Management
489 Generator Management Relay A-11
APPENDIX A A.1 COMMISSIONING
A
PHASE DIFFERENTIAL
Phase Differential Trip Off
Assi
g
n Trip Relays 1---
Differential Trip Min. Pickup 0.10 × CT
Differential Trip Slope 1 10%
Differential Trip Slope 2 20%
Differential Trip Delay 0 cycles
Assi
g
n Trip Relays 1---
GROUND DIRECTIONAL
Supervise With Di
g
ital Input Yes
Ground Directional MTA 0°
Ground Directional Alarm Off
Assi
g
n Alarm Relays ---5
Ground Directional Alarm Pickup 0.05 × CT
Ground Directional Alarm Delay 3.0 sec.
Ground Directional Alarm Events Off
Ground Directional Trip Off
Assi
g
n Trip Relays 1---
Ground Directional Trip Pickup 0.05 × CT
Ground Directional Trip Delay 3.0 sec.
HIGH-SET PHASE OVERCURRENT
Hi
g
h-Set Phase Overcurrent Trip Off
Assi
g
n Trip Relays 1---
Hi
g
h-Set Phase O/C Pickup 5.00 × CT
Hi
g
h-Set Phase O/C Delay 1.00 sec.
Table A–5: SETPOINTS PAGE 5 – CURRENT ELEMENTS (Sheet 7 of 7)
DESCRIPTION DEFAULT USER VALUE
SETPOINT GROUP 1
USER VALUE
SETPOINT GROUP 2