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S3 PROTECTION
6–62
GND ALARM PKP
Ground CT Type = 1A Secondary, 5A Secondary:
Range: 0.03 to 1.00xCT in steps of 0.01xCT
Default: 0.10xCT
Ground CT Type = 50:0.025:
Range: 0.50 to 15.00 A in steps of 0.01 A
Default: 10.00 A
This setting specifies the Pickup threshold for the Alarm stage.
GND ALARM ON RUN
Range: 0.00 to 60.00 s in steps of 0.01 s
Default: 0.00 s
This setting specifies the amount of time by which motor ground current must exceed
pickup to generate an alarm when the motor is in running condition.
GND ALARM ON START
Range: 0.00 to 60.00 s in steps of 0.01 s
Default: 0.00 s
This setting specifies the amount of time by which motor ground current must exceed
pickup to generate an alarm when the motor is in starting condition.
GND TRIP FUNC
Range: Disabled, Enabled
Default: Disabled
This setting enables the Ground Fault Trip functionality.
GND TRIP PKP
Ground CT Type = 1A Secondary, 5A Secondary:
Range: 0.03 to 1.00xCT in steps of 0.01xCT
Default: 0.10xCT
Ground CT Type = 50:0.025:
Range: 0.50 to 15.00 A in steps of 0.01 A
Default: 10.00 A
This setting specifies the Pickup threshold for the Trip stage.
GND TRIP ON RUN
Range: 0.00 to 5.00 s in steps of 0.01 s
Default: 0.00 s
This setting specifies the amount of time by which motor ground current must exceed
pickup to generate a Trip when the motor is in running condition.
GND TRIP ON START
Range: 0.00 to 10.00 s in steps of 0.01 s
Default: 0.00 s
This setting specifies the amount of time by which motor ground current must exceed
pickup to generate a Trip when the motor is in starting condition.
OUTPUT RELAY X
For details see
Common
To select any assignable output relays to operate upon the Ground Fault Alarm
operation, assign the Logic Operand "GROUND FAULT ALARM OP" or "Any Alarm OP" to a
Logic Element.
BLOCK 1 to 3
For details see
Common
setpoints.
setpoints.
339 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS
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