GE 489

A-14 489 Generator Management Relay
GE Power Management
A.1 COMMISSIONING APPENDIX A
A
NEUTRAL UNDERVOLTAGE (3RD HARMONIC)
Low Power Blockin
g
Level 0.05 × Rated MW
Low Volta
g
e Blockin
g
Level 0.75 × Rated
Neutral Undervolta
g
e Alarm Off
Assi
g
n Alarm Relays ---5
Neutral Undervolta
g
e Alarm Level 0.5 Vsec.
Neutral Undervolta
g
e Alarm Delay 30.0 sec.
Neutral Undervolta
g
e Alarm Events Off
Neutral Undervolta
g
e Trip Off
Assi
g
n Trip Relays 1---
Neutral Undervolta
g
e Trip Level 1.0 Vsec.
Neutral Undervolta
g
e Trip Delay 30.0 sec.
LOSS OF EXCITATION
Enable Volta
g
e Supervision Yes
Volta
g
e Level 0.70 × Rated
Circle 1 Trip Off
Assi
g
n Circle 1 Trip Relays 1---
Circle 1 Diameter 25.0 Ωsec.
Circle 1 Offset 2.5 Ωsec.
Circle 1 Trip Delay 5.0 sec.
Circle 2 Trip Off
Assi
g
n Circle 2 Trip Relays 1---
Circle 2 Diameter 35.0 Ωsec.
Circle 2 Offset 2.5 Ωsec.
Circle 2 Trip Delay 5.0 sec.
DISTANCE ELEMENTS
Step Up Transformer Setup None
Fuse Failure Supervision On
Zone #1 Trip Off
Assi
g
n Zone #1 Trip Relays 1---
Zone #1 Reach 10.0 Ωsec.
Zone #1 An
g
el 75°
Zone #1 Trip Delay 0.4 sec.
Zone #2 Trip Off
Assi
g
n Zone #2 Trip Relays 1---
Zone #2 Reach 15.0 Ωsec.
Zone #2 An
g
le 75°
Zone #2 Trip Delay 2.0 sec.
Table A–6: SETPOINTS PAGE 6 – VOLTAGE ELEMENTS (Sheet 3 of 3)
DESCRIPTION DEFAULT USER VALUE
SETPOINT GROUP 1
USER VALUE
SETPOINT GROUP 2