CHAPTER 6: METERING MOTOR
869 MOTOR PROTECTION SYSTEM – INSTRUCTION MANUAL 6–7
Stator Inter-Turn Fault
Path:
Metering > Motor > Stator Inter-Turn Fault
OPERATING QUANTITY
Range: 0.000 to 20.000 in steps of 0.001
Default: 0.400
This value represents the operating quantity of the Stator Inter-Turn Fault element.
LEARNED UNBAL Z
Range: 0.000 to 10.000 in steps of 0.001
Default: 0.200
This value represents the inherent asymmetries in the machine at the time of
commissioning and without stator inter-turn fault. This value is defined as Unbalance
Base Impedance (Z
UBbase
) and calculated during the learning phase of the Stator Inter-
Turn Fault algorithm.
TIME OF LEARNED UNBAL Z CALC
Range: Date/Time Format (MM/DD/YY HH:MM:SS)
Default: 01/01/08 00:00:00
This value represents the time when the learning phase has finished the calculation of
the last averaged Unbalance Base Impedance (Z
UBbase
).
MAX OPERATING QUANTITY
Range: 0.000 to 20.000 in steps of 0.001
Default: 0.500
This value represents the maximum of the operating quantity.
MAX LEARNED UNBAL Z
Range: 0.000 to 10.000 in steps of 0.001
Default: 0.200
This value represents the maximum of the learned Unbalance Base Impedance (Z
UBbase
).
Short Circuit
Path:
Metering > Motor > Short Circuit
NOTE:
These values are only seen if
Setpoints \ Protection \ Group1\Motor \ Short Circuit \ Function = NOT Disabled.
SC RMS Ia
Range: 0.000 to 120000.000 A in steps of 0.001
SC RMS Ib
Range: 0.000 to 120000.000 A in steps of 0.001
SC RMS Ic
Range: 0.000 to 120000.000 A in steps of 0.001
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