GE C70 Instruction Manual page 385

CHAPTER 5: SETTINGS
Up to three identical voltage differential elements, one per each VT bank configured in hardware, are provided.
The element responds to a differential signal between magnitudes of the bus and tap voltages. The latter is scaled using a
matching factor to account for the position of the tap. An automatic setting procedure is available under the
menu to calculate automatically the matching factor when installing the relay or after repairs of the bank.
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
VOLTAGE DIF 1 STG 2C

PICKUP: 0.020 pu
VOLTAGE DIF 1 STG 3C

PICKUP: 0.030 pu
VOLTAGE DIF 1 STG 4C

PICKUP: 0.040 pu
VOLTAGE DIF 1 STG 1

PKP DELAY: 30.00 s
VOLTAGE DIF 1 STG 2

PKP DELAY: 10.00 s
VOLTAGE DIF 1 STG 3

PKP DELAY: 1.00 s
VOLTAGE DIF 1 STG 4

PKP DELAY: 0.20 s
VOLTAGE DIF 1

DPO DELAY: 0.25 s
VOLT DIF 1 BLK STG1:

Off
VOLT DIF 1 BLK STG 2:

Off
VOLT DIF 1 BLK STG 3:

Off
VOLT DIF 1 BLK STG 4:

Off
VOLT DIF 1 TARGET:

Self-Reset
VOLT DIF 1 EVENTS:

Disabled
GROUPED ELEMENTS
Range: 0.001 to 1.000 pu in steps of 0.001
Range: 0.001 to 1.000 pu in steps of 0.001
Range: 0.001 to 1.000 pu in steps of 0.001
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: 0.00 to 600.00 s in steps of 0.01
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand
Range: FlexLogic operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
5
COMMAND
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