Instruction manual

6–34 MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL
PROTECTION ELEMENTS CHAPTER 6: SETPOINTS
RTD Bias - Center T
Range: 0 to 250°C in steps of 1 or OFF
Default: OFF
This setpoint specifies the stator RTD temperature appropriate for a thermal capacity
used value of 100% –
Hot/Cold Ratio. If RTD bias is to be deployed, enter the rated full
load motor running temperature. A value of “0” or a value greater than the
RTD Bias –
Maximum T
setpoint disables the RTD bias feature.
RTD Bias - Maximum T
Range: 0 to 250°C in steps of 1 or OFF
Default: OFF
This setpoint specifies the stator RTD temperature appropriate for a thermal capacity
used value of 100%. If RTD bias is to be deployed, enter the stator insulation
temperature rating. A value of “0” or a value greater than the
RTD Bias – Center T
setpoint disables the RTD bias feature.
Minimize Reset Time
Range: Enabled, Disabled
Default: Disabled
When set to “Disabled”, the lockout condition following a thermal protection operation
will persist until the thermal capacity used has dropped to 15%. When set to “Enabled”,
the lockout persists until the thermal capacity used has dropped to 2% below the
learned thermal capacity used at start (refer to the Thermal Start Inhibit for details).
Overload Reset Mode
Range: Manual, Auto
Default: Manual
If this setpoint value is “Auto”, an automatic reset of overload lockouts occurs after the
motor has cooled as described above. When set to “Manual”, the lockouts are replaced
with trips when the motor cools, the trips must be reset by the control panel, by remote
contact or by communications before the motor can be restarted.
Thermal Capacity Alarm Level
Range: 10 to 100% in steps of 1 or OFF
Default: OFF
This setpoint specifies the amount of thermal capacity used, equal to or above that at
which the thermal level alarm is issued.