GE MM300 - Mechanical protection

5–42 MM300 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL
PROTECTION ELEMENTS CHAPTER 5: 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 less than the
RTD Bias – Center T setpoint
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.
Mechanical protection
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.