GE C70 Instruction Manual page 406

GROUPED ELEMENTS
5
Up to three identical phase current unbalance elements, one per each CT/VT module configured in hardware, are provided.
The element responds to a differential current signal measured via window-type CTs as a vectorial current difference
between two parallel banks. With the two capacitors in the same phase identical, the said differential current is zero. Small
differences between the capacitors of a given phase result in a small circulating current. Subtracting an adequate portion
of the total bank current in a given phase compensates for this inherent unbalance current.
5-202
CUR UNBALCE 1 STG 1A

PICKUP: 0.020 pu
CUR UNBALCE 1 STG 2A

PICKUP: 0.030 pu
CUR UNBALCE 1 STG 3A

PICKUP: 0.040 pu
CUR UNBALCE 1 STG 4A

PICKUP: 0.050 pu
CUR UNBALCE 1 STG 1B

PICKUP: 0.020 pu
CUR UNBALCE 1 STG 2B

PICKUP: 0.030 pu
CUR UNBALCE 1 STG 3B

PICKUP: 0.040 pu
CUR UNBALCE 1 STG 4B

PICKUP: 0.050 pu
CUR UNBALCE 1 STG 1C

PICKUP: 0.020 pu
CUR UNBALCE 1 STG 2C

PICKUP: 0.030 pu
CUR UNBALCE 1 STG 3C

PICKUP: 0.040 pu
CUR UNBALCE 1 STG 4C

PICKUP: 0.050 pu
CUR UNBALCE 1 STG 1

PKP DELAY: 30.00 s
CUR UNBALCE 1 STG 2

PKP DELAY: 10.00 s
CUR UNBALCE 1 STG 3

PKP DELAY: 1.00 s
CUR UNBALCE 1 STG 4

PKP DELAY: 0.20 s
CUR UNBALCE 1

DPO DELAY: 0.25 s
CUR UNBL 1 BLK STG1:

Off

CUR UNBL 1 BLK STG4:

Off
CUR UNBALCE 1

TARGET: Self-Reset
CUR UNBALCE 1

EVENTS: Disabled
C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
Range: 0.001 to 5.000 pu in steps of 0.001
Range: 0.001 to 5.000 pu in steps of 0.001
Range: 0.001 to 5.000 pu in steps of 0.001
Range: 0.001 to 5.000 pu in steps of 0.001
Range: 0.001 to 5.000 pu in steps of 0.001
Range: 0.001 to 5.000 pu in steps of 0.001
Range: 0.001 to 5.000 pu in steps of 0.001
Range: 0.001 to 5.000 pu in steps of 0.001
Range: 0.001 to 5.000 pu in steps of 0.001
Range: 0.001 to 5.000 pu in steps of 0.001
Range: 0.001 to 5.000 pu in steps of 0.001
Range: 0.001 to 5.000 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: Self-reset, Latched, Disabled
Range: Disabled, Enabled