Overvoltage; Phase Reversal - GE 469 Instruction Manual

469
Motor Management Relay

Overvoltage

OVERVOLTAGE

Phase Reversal

PHASE
REVERSAL
NOTE
5–66
PATH: SETPOINTS S9 VOLTAGE ELEM.
[ ] OVERVOLTAGE
ALARM: Off
ASSIGN ALARM RELAYS:
MESSAGE
Alarm
OVERVOLTAGE ALARM
MESSAGE
PICKUP: 1.05 x RATED
OVERVOLTAGE ALARM
MESSAGE
DELAY: 3.0 s
OVERVOLTAGE ALARM
MESSAGE
EVENTS: Off
OVERVOLTAGE
MESSAGE
TRIP: Off
ASSIGN TRIP RELAYS:
MESSAGE
Trip
OVERVOLTAGE TRIP
MESSAGE
PICKUP: 1.10 x RATED
OVERVOLTAGE TRIP
MESSAGE
DELAY: 3.0 s
If enabled, once the magnitude of either Vab, Vbc, or Vca rises above the pickup
level for a period of time specified by the delay, a trip or alarm will occur (pickup
levels are multiples of motor nameplate voltage).
An overvoltage on running motor with a constant load results in decreased current.
However, iron and copper losses increase, causing an increase in motor
temperature. The current overload relay will not pickup this condition and provide
adequate protection. Therefore, the overvoltage element may be useful for
protecting the motor in the event of a sustained overvoltage condition.
PATH: SETPOINTS S9 VOLTAGE ELEM.
[ ] PHASE REVERSAL
TRIP: Off
ASSIGN TRIP RELAYS:
MESSAGE
Trip
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 setpoint, a trip and block start will occur in 500 to 700 ms.
This feature does not work when single VT operation is enabled.
http://www.GEindustrial.com/multilin
S9 Voltage Elements
OVERVOLTAGE
Range: Off, Latched, Unlatched
Range: Alarm, Alarm & Auxiliary2,
Alarm & Aux2 & Aux3, Alarm &
Auxiliary3, Auxiliary2, Aux2 &
Aux3, Auxiliary3
Range: 1.01 to 1.20 x RATED in steps of
0.01
Range: 0.5 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: 1.01 to 1.20 x RATED in steps of
0.01
Range: 0.5 to 60.0 s in steps of 0.1
PHASE REVERSAL
Range: Off, Latched, Unlatched
Range: Trip, Trip & Auxiliary2, Trip &
Aux2 & Aux3, Trip & Auxiliary3
GE Multilin