GE Multilin 489 User Manual

5–90 489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
5.11 S10 Monitoring
5.11.1 Trip Counter
PATH: SETPOINTS ZV S10 MONITORING Z TRIP COUNTER
When enabled, a trip counter alarm will occur when the TRIP COUNTER ALARM LEVEL is
reached. The trip counter must be cleared or the alarm level raised and the reset key must
be pressed (if the alarm was latched) to reset the alarm.
For example, it might be useful to set a Trip Counter alarm at 100 trips, prompting the
operator or supervisor to investigate the type of trips that have occurred. A breakdown of
trips by type may be found in the
A4 MAINTENANCE ZV TRIP COUNTERS actual values page.
If a trend is detected, it would warrant further investigation.
5.11.2 Breaker Failure
PATH: SETPOINTS ZV S10 MONITORING ZV BREAKER FAILURE
If the breaker failure alarm feature may be enabled as latched or unlatched. If the 1 Trip
output relay is operated and the generator current measured at any of the three output
CTs is above the level programmed for the period of time specified by the delay, a breaker
failure alarm will occur. The time delay should be slightly longer than the breaker clearing
time.

TRIP [Z]
TRIP COUNTER
ALARM: Off
Range: Off, Latched, Unlatched
MESSAGE
ASSIGN ALARM
RELAYS (2-5): ---5
Range: Any combination of Relays 2 to
5
MESSAGE
TRIP COUNTER ALARM
LEVEL: 25 Trips
Range: 1 to 50000 Trips in steps of 1
MESSAGE
TRIP COUNTER ALARM
EVENTS: Off
Range: On, Off

BREAKER [Z]
BREAKER FAILURE
ALARM: Off
Range: Off, Latched, Unlatched
MESSAGE
ASSIGN ALARM
RELAYS (2-5): ---5
Range: Any combination of Relays 2 to
5
MESSAGE
BREAKER FAILURE
LEVEL: 1.00 x CT
Range: 0.05 to 20.00 × CT in steps of
0.01
MESSAGE
BREAKER FAILURE
DELAY: 100 ms
Range: 10 to 1000 ms in steps of 10
MESSAGE
BREAKER FAILURE
ALARM EVENTS: Off
Range: On, Off
Courtesy of NationalSwitchgear.com

GE Multilin 489 Specifications

General

Brand	GE
Model	Multilin 489
Category	Relays
Language	English