Transformer - GE SR345 Instruction Manual

CHAPTER 6: SETPOINTS

Transformer

345 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
Courtesy of NationalSwitchgear.com
SYSTEM ROTATION
Range: ABC, ACB,
Default: ABC
Enter the phase sequence of the power system.
PATH:
SETPOINTS > S2 SYSTEM SETUP > TRANSFORMER
XFMR RATED LOAD
Range: 0.01 to 50.00 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/D30
Select the transformer connection from a list of transformer types shown in table XX
"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: 0.1 to 65.00 KV in steps of 0.1
Default: 13.80 KV
Enter the nominal phase-to phase-voltage rating of Winding 1 of the transformer.
W1 GROUNDING
Range: Not Within Zone, Within Zone
Default: Not Within Zone
Select the setting "Within Zone", if there is a grounding path at Winding 1 side of the
transformer such as grounded neutral, grounding transformer, or grounded corner of a
delta winding. Select "Not Within Zone", if there is no grounding path for Winding 1 in the
zone.
W2 NOM VOLTAGE
Range: 0.1 to 65.00 KV in steps of 0.1
Default: 4.16 KV
Enter the nominal phase-to phase-voltage rating of Winding 2 of the transformer.
W2 GROUNDING
Range: Not Within Zone, Within Zone
Default: Not Within Zone
Select the setting "Within Zone", if there is a grounding path at the Winding 2 side of the
transformer, such as grounded neutral, grounding transformer, or grounded corner of a
delta winding. Select "Not Within Zone", if there is no grounding path for Winding 2 in the
zone.
S2 SYSTEM SETUP
6–49