4-50
469 Motor Management Relay
GE Power Management
4.7 S6 CURRENT ELEMENTS
4 SETPOINT PROGRAMMING
4
4.7.6 GROUND FAULT
The Ground Fault element functions as follows. Once the ground current magnitude exceeds the Pickup Level
×
GROUND CT PRIMARY
(see Section 4.3.1: CURRENT SENSING on page 4–11) for the time specified by the
delay, a trip and/or alarm will occur. There is also a backup trip feature that can be enabled. If the
GROUND
FAULT TRIP BACKUP
is
"On"
, and a Ground Fault trip has initiated, a second trip will occur if the ground current
persists longer than the
GROUND FAULT TRIP BACKUP DELAY
. It is intended that this second trip be assigned to R2
or R3, which would be dedicated as an upstream breaker trip relay. The
GROUND FAULT TRIP BACKUP DELAY
must be set to a time longer than the breaker clearing time.
y
GROUND FAULT
y
[ENTER] for more
GROUND FAULT
OVERREACH FILTER: Off
Range: On, Off
GROUND FAULT
ALARM: Off
Range: Off, Latched, Unlatched
ASSIGN ALARM RELAYS:
Alarm
Range:
Alarm, Alarm & Auxiliary2, Alarm & Aux2 & Aux3,
Auxiliary2, Aux2 & Aux3, Auxiliary3
GROUND FAULT ALARM
PICKUP: 0.10 x CT
Range: 0.10 to 1.00 x CT, step: 0.01. Seen only if Ground CT is
programmed as 1A or 5A Secondary
GROUND FAULT ALARM
PICKUP: 1.00 A
Range:
0.25 to 25.00 A, step: 0.01. Seen only if Ground CT is
programmed as Multilin 50:0.025
INTENTIONAL GF ALARM
DELAY: 0 ms
Range: 0 to 1000 ms, step: 1
GROUND FAULT ALARM
EVENTS: Off
Range: On, Off
GROUND FAULT
TRIP: Off
Range: Off, Latched, Unlatched
ASSIGN TRIP RELAYS:
Trip
Range:
Trip, Trip & Auxiliary2, Trip & Aux2 & Aux3,
Trip & Auxiliary3, Auxiliary2, Aux2 & Aux3, Auxiliary3
GROUND FAULT TRIP
PICKUP: 0.20 x CT
Range:
0.10 to 1.00 x CT, step: 0.01. Seen only if Ground CT is
programmed as 1A or 5A Secondary
GROUND FAULT TRIP
PICKUP: 1.00 A
Range:
0.25 to 25.00 A; step: 0.01. Seen only if Ground CT is
programmed as Multilin 50:0.025
INTENTIONAL GF TRIP
DELAY: 0 ms
Range: 0 to 1000 ms, step: 1
GROUND FAULT TRIP
BACKUP: Off
Range: On, Off
ASSIGN BACKUP
RELAYS: Auxiliary2
Range: Auxiliary2, Aux2 & Aux3, Auxiliary3
GROUND FAULT TRIP
BACKUP DELAY: 200 ms
Range: 10 to 2000 ms, step: 10
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Содержание MOTOR MANAGEMENT RELAY 469
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