CHAPTER 5: SETTINGS
469 MOTOR MANAGEMENT RELAY – INSTRUCTION MANUAL
5–87
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
Note
1 Nm = 0.738 ft·lb.
5.11.7 Overtorque
PATH: SETTINGS
S10 POWER ELEMENTS
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:
Alarm
Range: Alarm, Alarm & Auxiliary2,
Alarm & Aux2 & Aux3, Alarm &
Auxiliary3, Auxiliary2, Aux2 &
Aux3, Auxiliary3, None
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
Summary of Contents for Masoneilan 469 Series
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Page 92: ...3 28 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 3 INSTALLATION ...
Page 256: ...5 112 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 5 SETTINGS ...
Page 298: ...6 42 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 6 ACTUAL VALUES ...
Page 321: ...CHAPTER 8 APPENDIX 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL 8 9 808712A1 CDR ...
Page 330: ...8 18 469 MOTOR MANAGEMENT RELAY INSTRUCTION MANUAL CHAPTER 8 APPENDIX ...