CHAPTER 5: SETTINGS GROUPED ELEMENTS
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL 5-241
5
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
COMMAND
menu to calculate automatically the matching factor when installing the relay or after repairs of the bank.

VOLTAGE DIF 1 STG 2C
PICKUP: 0.020 pu
Range: 0.001 to 1.000 pu in steps of 0.001

VOLTAGE DIF 1 STG 3C
PICKUP: 0.030 pu
Range: 0.001 to 1.000 pu in steps of 0.001

VOLTAGE DIF 1 STG 4C
PICKUP: 0.040 pu
Range: 0.001 to 1.000 pu in steps of 0.001

VOLTAGE DIF 1 STG 1
PKP DELAY: 30.00 s
Range: 0.00 to 600.00 s in steps of 0.01

VOLTAGE DIF 1 STG 2
PKP DELAY: 10.00 s
Range: 0.00 to 600.00 s in steps of 0.01

VOLTAGE DIF 1 STG 3
PKP DELAY: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01

VOLTAGE DIF 1 STG 4
PKP DELAY: 0.20 s
Range: 0.00 to 600.00 s in steps of 0.01

VOLTAGE DIF 1
DPO DELAY: 0.25 s
Range: 0.00 to 600.00 s in steps of 0.01

VOLT DIF 1 BLK STG1:
Off
Range: FlexLogic operand

VOLT DIF 1 BLK STG 2:
Off
Range: FlexLogic operand

VOLT DIF 1 BLK STG 3:
Off
Range: FlexLogic operand

VOLT DIF 1 BLK STG 4:
Off
Range: FlexLogic operand

VOLT DIF 1 TARGET:
Self-Reset
Range: Self-reset, Latched, Disabled

VOLT DIF 1 EVENTS:
Disabled
Range: Disabled, Enabled
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