Ground Fault - GE 469 Instruction Manual

4.7 S6 CURRENT ELEMENTS
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PATH: SETPOINTS S6 CURRENT ELEMENTS
n GROUND FAULT
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4
The Ground Fault element functions as follows. Once the ground current magnitude exceeds the Pickup Level ×
(see Section 4.3.1: Current Sensing on page 4–12) for the time specified by the delay, a trip and/or alarm will
CT PRIMARY
occur. There is also a backup trip feature that can be enabled. If the
Fault trip has initiated, a second trip will occur if the ground current persists longer than the
. It is intended that this second trip be assigned to R2 or R3, which would be dedicated as an upstream breaker trip
DELAY
relay. The
GROUND FAULT TRIP BACKUP DELAY
Care must be taken when turning On this feature. If the interrupting device (contactor or circuit breaker) is
not rated to break ground fault current (low resistance or solidly grounded systems), the feature should be
NOTE
disabled. Alternately, the feature may be assigned to an auxiliary relay and connected such that it trips an
upstream device that is capable of breaking the fault current.
4-46
Courtesy of NationalSwitchgear.com
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GROUND FAULT

ð
GROUND FAULT
ENTER
ESCAPE OVERREACH FILTER: Off
GROUND FAULT
ESCAPE
ALARM: Off
MESSAGE
ASSIGN ALARM RELAYS:
ESCAPE
Alarm
MESSAGE
GROUND FAULT ALARM
ESCAPE
PICKUP: 0.10 x CT
MESSAGE
GROUND FAULT ALARM
ESCAPE
PICKUP: 1.00 A
MESSAGE
INTENTIONAL GF ALARM
ESCAPE
MESSAGE DELAY: 0 ms
GROUND FAULT ALARM
ESCAPE
EVENTS: Off
MESSAGE
GROUND FAULT
ESCAPE
TRIP: Off
MESSAGE
ASSIGN TRIP RELAYS:
ESCAPE
Trip
MESSAGE
GROUND FAULT TRIP
ESCAPE
MESSAGE PICKUP: 0.20 x CT
GROUND FAULT TRIP
ESCAPE
PICKUP: 1.00 A
MESSAGE
INTENTIONAL GF TRIP
ESCAPE
DELAY: 0 ms
MESSAGE
GROUND FAULT TRIP
ESCAPE
BACKUP: Off
MESSAGE
ASSIGN BACKUP
ESCAPE
RELAYS: Auxiliary2
MESSAGE
GROUND FAULT TRIP
ESCAPE
BACKUP DELAY: 200 ms
MESSAGE
must be set to a time longer than the breaker clearing time.
469 Motor Management Relay
4.7.6 GROUND FAULT
Range: On, Off
Range: Off, Latched, Unlatched
Range: Alarm, Alarm & Auxiliary2, Alarm & Aux2 & Aux3,
Auxiliary2, Aux2 & Aux3, Auxiliary3
Range: 0.10 to 1.00 x CT, step: 0.01. Seen only if Ground
CT is programmed as 1A or 5A Secondary
Range: 0.25 to 25.00 A, step: 0.01. Seen only if Ground
CT is programmed as Multilin 50:0.025
Range: 0 to 1000 ms in steps of 1
Range: On, Off
Range: Off, Latched, Unlatched
Range: Trip, Trip & Auxiliary2, Trip & Aux2 & Aux3,
Trip & Auxiliary3, Auxiliary2, Aux2 & Aux3,
Auxiliary3
Range: 0.10 to 1.00 x CT, step: 0.01. Seen only if Ground
CT is programmed as 1A or 5A Secondary
Range: 0.25 to 25.00 A; step: 0.01. Seen only if Ground
CT is programmed as Multilin 50:0.025
Range: 0 to 1000 ms in steps of 1
Range: On, Off
Range: Auxiliary2, Aux2 & Aux3, Auxiliary3
Range: 10 to 2000 ms in steps of 10
GROUND FAULT TRIP BACKUP
GROUND FAULT TRIP BACKUP
4 SETPOINTS
GROUND
is "On", and a Ground
GE Multilin