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Mechanical Protection - GE MM300 Instruction Manual

Motor management system low voltage motor protection and control.
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PROTECTION ELEMENTS

Mechanical protection

5–42
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
load motor running temperature. A value of "0" or a value greater than the
setpoint disables the RTD bias feature.
Maximum T
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 less than the
disables the RTD bias feature.
Thermal O/L Lockout Trip
Range: 10 to 100% in steps of 1% or OFF
Default: OFF
This setpoint specifies whether the trip is considered a lockout or non-lockout trip.
Select the Home > Setpoints > Protection > Mech page to edit the mechanical protection
setpoints.
Figure 5-32: Mechanical protection configuration setpoints
The mechanical protection setpoints are divided into the following categories.
Mechanical jam
Undercurrent protection
Underpower protection
Acceleration protection
Open control circuit trip.
The setpoints applicable to each of these categories are described in the following
sections.
. If RTD bias is to be deployed, enter the rated full
RTD Bias – Center T
MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETPOINTS
RTD Bias –
setpoint

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