GE 469 User Manual

CHAPTER 5: SETTINGS
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL 5–85
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.
Note
1 Nm = 0.738 ft·lb.
5.11.7 Overtorque
PATH: SETTINGS ZV S10 POWER ELEMENTS ZV OVERTORQUE
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
Range: Off, Latched, Unlatched
MESSAGE
ASSIGN ALARM
RELAYS:
Range: Alarm, Alarm & Auxiliary2,
Alarm & Aux2 & Aux3, Alarm &
Auxiliary3, Auxiliary2, Aux2 &
Aux3, Auxiliary3
MESSAGE
TORQUE ALARM
LEVEL: 4000.0 Nm
Range: 0.1 to 999999.9 Nm (or ft·lb) in
steps of 0.1
MESSAGE
TORQUE ALARM
DELAY: 1.0 s
Range: 0.2 to 30 s in steps of 0.1
MESSAGE
TORQUE ALARM
EVENTS: Off
Range: On, Off

GE 469 Specifications

General

Brand	GE
Model	469
Category	Relays
Language	English