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S2 SYSTEM SETUP
Power system
6–48
Courtesy of NationalSwitchgear.com
W1 PH CT SECONDARY
Range: 1 A to 5 A in steps of 1 A
Default: 1 A
Configurable 1 A or 5 A secondary (must be specified with order code P0G0). Enter the
rated phase CT secondary current of the three-phase current transformers associated
with Winding 1.
W1 GND CT PRIMARY
Range: 1 A to 6000 A in steps of 1 A
Default: 5 A
Enter the rated ground CT primary current of the ground current transformers
associated with Winding 1.
W1 GND CT SECONDARY
Range: 1 A to 5 A in steps of 1 A
Default: 1 A
Configurable 1 A or 5 A secondary (must be specified with order code P0G0). Enter the
rated ground CT secondary current of the ground current transformers associated with
Winding 1.
W2 PH CT PRIMARY
Range: 1 A to 6000 A in steps of 1 A
Default: 5 A
Enter the rated phase CT primary current of the three-phase current transformers
associated with Winding 2.
W2 PH CT SECONDARY
Range: 1 A to 5 A in steps of 1 A
Default: 1 A
Configurable 1 A or 5 A secondary (must be specified with order code P0G0). Enter the
rated phase CT secondary current of the three-phase current transformers associated
with Winding 2.
W2 GND CT PRIMARY
Range: 1 A to 6000 A in steps of 1 A
Default: 5 A
Enter the rated ground CT primary current of the ground current transformers
associated with Winding 2.
W2 GND CT SECONDARY
Range: 1 A to 5 A in steps of 1 A
Default: 1 A
Configurable 1 A or 5 A secondary (must be specified with order code P0G0). Enter the
rated ground CT secondary current of the ground current transformers associated with
Winding 2.
PATH:
SETPOINTS > S2 SYSTEM SETUP > POWER SYSTEM
NOMINAL FREQUENCY
Range: 60 Hz, 50 Hz
Default: 60 Hz
Enter the nominal power system frequency. This value is used as a default to set the
optimal digital sampling rate.
345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS
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