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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
DELA
Y
SETTING
T
ime
to
T
rip
(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