Overvoltage; Phase Reversal - GE MOTOR MANAGEMENT RELAY 469 Instruction Manual

4.10 S9 VOLTAGE ELEMENTS
S OVERVOLTAGE
S [ENTER] for more
4
If enabled, once the magnitude of either Va, Vb, or Vc 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 con-
dition and provide adequate protection. Therefore, the overvoltage element may be useful for protecting the
motor in the event of a sustained overvoltage condition.
S PHASE REVERSAL
S [ENTER] for more
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.
NOTE
4-64
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OVERVOLTAGE

ENTER
ALARM: Off
ESCAPE
ASSIGN ALARM RELAYS:
ESCAPE
Alarm
MESSAGE
OVERVOLTAGE ALARM
ESCAPE
PICKUP: 1.05 x RATED
MESSAGE
OVERVOLTAGE ALARM
ESCAPE
DELAY: 3.0 s
MESSAGE
OVERVOLTAGE ALARM
ESCAPE
EVENTS: Off
MESSAGE
OVERVOLTAGE
ESCAPE
TRIP: Off
MESSAGE
ASSIGN TRIP RELAYS:
ESCAPE
Trip
MESSAGE
OVERVOLTAGE TRIP
ESCAPE
PICKUP: 1.10 x RATED
MESSAGE
OVERVOLTAGE TRIP
ESCAPE
DELAY: 3.0 s
MESSAGE
ð

PHASE REVERSAL

ENTER
TRIP: Off
ESCAPE
ASSIGN TRIP RELAYS:
ESCAPE
Trip
MESSAGE
469 Motor Management Relay
4 SETPOINT PROGRAMMING
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, step 0.01
Range: 0.5 to 60.0 sec., step 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, step 0.01
Range: 0.5 to 60.0 sec., step 0.1
4.10.3 PHASE REVERSAL
Range: Off, Latched, Unlatched
Range: Trip, Trip & Auxiliary2, Trip & Aux2 & Aux3,
Trip & Auxiliary3
4.10.2 OVERVOLTAGE
GE Power Management