Overtorque - GE 469 Instruction Manual

CHAPTER 5: SETTINGS
Note

5.11.7 Overtorque

OVERTORQUE
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
Before torque can be determined, the motor stator resistance and number of pole pairs
must be entered here. The base stator resistance can be determined from the motor's
rated voltage and current. Torque metering is intended for induction motors only, and only
positive torque is calculated. Please consult the motor specifications for the stator
resistance and the pole pairs.
The default unit for torque is the SI unit of Newton-meter (Nm). The torque unit is selectable
to either Newton-meter or foot-pound.
1 Nm = 0.738 ft·lb.
PATH: SETTINGS S10 POWER ELEMENTS
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Detection of a motor overtorque condition, usually done to protect devices driven by the
motor, can be set up here. The assigned relay activates when the torque measured
exceeds the specified level for the specified time duration.
OVERTORQUE
OVERTORQUE
ALARM: Off
ASSIGN ALARM
RELAYS:
TORQUE ALARM
LEVEL: 4000.0 Nm
TORQUE ALARM
DELAY: 1.0 s
TORQUE ALARM
EVENTS: Off
Range: Off, Latched, Unlatched
Range: Alarm, Alarm & Auxiliary2,
Alarm & Aux2 & Aux3, Alarm &
Auxiliary3, Auxiliary2, Aux2 &
Aux3, Auxiliary3
Range: 0.1 to 999999.9 Nm (or ft·lb) in
steps of 0.1
Range: 0.2 to 30 s in steps of 0.1
Range: On, Off
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