GE 339

CHAPTER 6: SETPOINTS S3 PROTECTION
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 6–47
RTD BIAS FUNC
Range: Disabled, Enabled
Default: Disabled
For details see Common setpoints
.
RTD BIAS MINIMUM
Range: 0 to 130
o
C in steps of 1
o
C
Default: 40
o
C
Sets the stator RTD temperature appropriate for a Thermal Capacity Used value of zero.
If RTD Bias is to be deployed, enter the rated ambient temperature.
RTD BIAS CENTER
Range: 40 to 155
o
C in steps of 1
o
C
Default: 110
o
C
Sets the stator RTD temperature appropriate for the steady state Thermal Capacity Used
at rated full load motor current. If RTD Bias is to be deployed, enter the rated full load
motor running temperature.
RTD BIAS MAXIMUM
Range: 130 to 250
o
C in steps of 1
o
C
Default: 130
o
C
Sets 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.
THERMAL ALARM FUNC
Range: Disabled, Enabled
Default: Disabled
Sets to enable or disable the Thermal Capacity Alarm function.
THERMAL ALARM PKP
Range: 10% to 100% in steps of 1%
Default: 75%
Sets the amount of the Thermal Capacity Used where the Thermal Capacity Alarm will
be issued.
AUTORESET TCU≤15%
Range: Auto, Manual
Default: Manual
If this Setpoint is set to AUTO, an automatic reset of an overload lockout occurs after the
Thermal Capacity Used has dropped to 15%. When set to MANUAL, the lockout is
replaced with a trip when the motor cools. This trip must be reset by the control panel, a
remote contact, or a communication command, before the motor can be restarted.
OUTPUT RELAY X
For details see Common setpoints
.
BLOCK 1 to 3
For details see Common setpoints
.