GE MM200 User Manual

CHAPTER 4: SETPOINTS PROTECTION ELEMENTS
MM200 MOTOR MANAGEMENT SYSTEM – INSTRUCTION MANUAL 4–23
rides through normal operational disturbances. Normally, the ground fault time delays are
set as short as possible, that is, 0 ms. Time may have to be increased if nuisance tripping
occurs.
The following setpoints are available for the ground fault protection element.
Ground Trip Level
Range: 0.5 to 15.0 A in steps of 0.1 A
Default: OFF
This setpoint specifies the ground fault trip pickup level. A value of “OFF” disables the
ground fault trip function.
Ground Trip Delay on Start
Range: 0.0 to 10.0 s in steps of 0.1 s
Default: 0.0 s
This setpoint specifies the time that the motor ground fault current must meet or exceed
pickup to generate a ground fault trip when the motor is in a starting condition.
Ground Trip Delay on Run
Range: 0.0 to 5.0 s in steps of 0.1 s
Default: 0.0 s
This setpoint specifies the time that the motor ground fault current must meet or exceed
pickup to generate a ground fault trip when the motor is in a running condition.
Ground Alarm Level
Range: 0.5 to 15.0 A in steps of 0.1 A, when Ground CT type is set to "CBCT 2000:1"
Default: OFF
The setpoint specifies the ground fault alarm pickup level. A value of “OFF” disables the
ground fault alarm function.
Ground Alarm Delay on Start
Range: 0 to 60 s in steps of 1 s
Default: 10 s
This setpoint specifies the time that the motor ground fault current must meet or exceed
pickup to generate a ground fault alarm.
Ground Alarm Delay on Run
Range: 0 to 60 s in steps of 1 s
Default: 10 s
This setpoint specifies the time that the motor ground fault current must meet or exceed
pickup to generate a ground fault alarm.
Load increase alarm The load increase alarm is used to alarm abnormal load increases that may indicate
problems with the process. An alarm is enabled only after the acceleration phase is
complete and the motor has entered the running phase, and then only if the average
current has fallen below the set pickup. Once enabled, the alarm is generated when the
current exceeds the set pickup, and automatically resets when the current has subsided.
The following setpoints are available.
Load Increase Alarm Level
Range: 50 to 150% of FLA in steps of 1, or OFF
Default: OFF
This setpoint specifies the load increase alarm pickup level. A value of “OFF” disables the
load increase alarm.

GE MM200 Specifications

General

Brand	GE
Model	MM200
Category	Control Unit
Language	English