6–22
345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
S2 SYSTEM SETUP
CHAPTER 6: SETPOINTS
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.
Power system
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.
SYSTEM ROTATION
Range: ABC, ACB,
Default: ABC
Enter the phase sequence of the power system.
Transformer
PATH
:
SETPOINTS > S2 SYSTEM SETUP > TRANSFORMER
XFMR RATED LOAD
Range: 0.00 to 200.00 MVA in steps of 0.01
Default: 5.00 MVA
Enter the self-cooled (100%) load rating for the power transformer.
TRANSFORMER TYPE
Range: Refer to above "Transformer Types" table
Default: y/y0
Select the transformer connection from a list of transformer types shown in table 6-1
“Transformer types” .
PHASE COMPENSATION
Range: Internal (software), External (withCTs)
Default: Internal (software)
Select the type of phase compensation to be performed by the relay. If set to “Internal
(software)”, the transformer magnitude and phase shift compensations are performed
internally by the relay algorithm. If set to “External (with CT’s)”, the transformer phase
shift is externally compensated by the CT connections. The relay still performs
magnitude compensation when the “External (with CTs)” option is selected.
W1 NOM VOLTAGE
Range: 0.01 to 250.00 KV in steps of 0.01
Default: 13.80 KV
Enter the nominal phase-to phase-voltage rating of Winding 1 of the transformer.
Summary of Contents for 345
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Page 92: ...3 38 345 TRANSFORMER PROTECTION SYSTEM INSTRUCTION MANUAL SOFTWARE SETUP CHAPTER 3 INTERFACES ...
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