F Requency - GE 469 Instruction Manual

CHAPTER 5: SETTINGS
Note
5.10.4 Frequency
 FREQUENCY
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
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
ALARM: Off
ASSIGN ALARM RELAYS:
MESSAGE
Alarm
OVER FREQUENCY
MESSAGE
ALARM LEVEL: 60.50
UNDER FREQUENCY
MESSAGE
ALARM LEVEL: 59.50
FREQUENCY
MESSAGE
ALARM DELAY: 1.0 s
FREQUENCY
MESSAGE
ALARM EVENTS: Off
FREQUENCY
MESSAGE
TRIP: Off
ASSIGN TRIP RELAYS:
MESSAGE
Trip
OVER FREQUENCY
MESSAGE
TRIP LEVEL: 60.50 Hz
UNDER FREQUENCY
MESSAGE
TRIP LEVEL: 59.50 Hz
FREQUENCY
MESSAGE
TRIP DELAY: 1.0 s
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.

FREQUENCY
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
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