Multilin 469 Motor Management Relay ... - GE Digital Energy

CHAPTER 5: SETTINGS
Note
5.10.4 Frequency
The 469 can detect the phase rotation of the three phase voltage. If the Phase Reversal
feature is turned on when all 3 phase voltages are greater than 50% motor nameplate
voltage, and the phase rotation of the three phase voltages is not the same as the settings,
a trip and block start will occur in 500 to 700 ms.
This feature does not work when single VT operation is enabled.
PATH: SETTINGS S9 VOLTAGE ELEM. FREQUENCY
FREQUENCY [
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
MESSAGE
FREQUENCY
ALARM: Off
ASSIGN ALARM
RELAYS:
OVER FREQUENCY
ALARM LEVEL:
UNDER FREQUENCY
ALARM LEVEL:
FREQUENCY
ALARM DELAY: 1.0
FREQUENCY
ALARM EVENTS: Off
FREQUENCY
TRIP: Off
ASSIGN TRIP
RELAYS:
OVER FREQUENCY
TRIP LEVEL: 60.50
UNDER FREQUENCY
TRIP LEVEL: 59.50
FREQUENCY
TRIP DELAY: 1.0 s
Range: Off, Latched, Unlatched
Range: Alarm, Alarm & Auxiliary2,
Alarm & Aux2 & Aux3, Alarm &
Auxiliary3, Auxiliary2, Aux2 &
Aux3, Auxiliary3, None
Range: 25.01 to 70.00 Hz in steps of
0.01
Range: 20.00 to 60.00 Hz in steps of
0.01
Range: 0.0 to 60.0 s in steps of 0.1
Range: On, Off
Range: Off, Latched, Unlatched
Range: Trip, Trip & Auxiliary2, Trip &
Aux2 & Aux3, Trip & Auxiliary3
Range: 25.01 to 70.00 Hz in steps of
0.01
Range: 20.00 to 60.00 Hz in steps of
0.01
Range: 0.0 to 60.0 s in steps of 0.1
Once the frequency of the phase AN or AB voltage (depending on wye or delta connection)
is out of range of the overfrequency and underfrequency settings, a trip or alarm will occur.
This feature may be useful for load shedding applications on large motors. It could also be
used to load shed an entire feeder if the trip was assigned to an upstream breaker.
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL 5–79