GE Multilin 489

5–44 489 GENERATOR MANAGEMENT RELAY – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
where: T = trip time in seconds
D =
UNDERVOLTAGE TRIP DELAY setpoint
V = actual average phase-phase voltage
V
pickup
= UNDERVOLTAGE TRIP PICKUP setpoint
FIGURE 5–6: Undervoltage Curves
5.7.2 Overvoltage
PATH: SETPOINTS ZV S6 VOLTAGE ELEM. ZV OVERVOLTAGE
808742A1.CDR
0.1
1
10
100
1000
0 0.2 0.4 0.6 0.8 1
Multiples of Undervoltage Pickup
10
3
1
0.3
TIME DELAY SETTING
Time to Trip (seconds)
1 OVERVOLTAGE [Z] OVERVOLTAGE
ALARM: Off
Range: Off, Latched, Unlatched
MESSAGE
ASSIGN ALARM
RELAYS (2-5): ---5
Range: Any combination of Relays 2 to
5
MESSAGE
OVERVOLTAGE ALARM
PICKUP: 1.15 x Rated
Range: 1.01 to 1.50 × Rated in steps of
0.01
MESSAGE
OVERVOLTAGE ALARM
DELAY: 3.0 s
Range: 0.2 to 120.0 s in steps of 0.1
MESSAGE
OVERVOLTAGE ALARM
EVENTS: Off
Range: On, Off
MESSAGE
OVERVOLTAGE
TRIP: Off
Range: Off, Latched, Unlatched
MESSAGE
ASSIGN TRIP
RELAYS (1-4): 1---
Range: Any combination of Relays 1 to
4
MESSAGE
OVERVOLTAGE TRIP
PICKUP: 1.20 x Rated
Range: 1.01 to 1.50 × Rated in steps of
0.01
MESSAGE
OVERVOLTAGE TRIP
DELAY: 1.0 s
Range: 0.1 to 10.0 s in steps of 0.1
Courtesy of NationalSwitchgear.com