GE C70 Instruction Manual page 327

CHAPTER 5: SETTINGS
There are three phase overvoltage elements available. A phase overvoltage element is used as an instantaneous element
with no intentional time delay or as a definite time element. The input voltage is the phase-to-phase voltage, either
measured directly from delta-connected VTs or as calculated from phase-to-ground (wye) connected VTs. The figure
shows specific voltages to be used for each phase.
SETTING
PHASE OV1
FUNCTION:
Disabled = 0
Enabled = 1
SETTING
AND
PHASE OV1
BLOCK:
Off = 0
SETTING
PHASE OV1
SOURCE:
Source VT = Delta
VAB
VBC
VCA
Source VT = Wye
If the source VT is wye-connected, then the phase overvoltage pickup condition is
and V .
CA
NOTE
5.7.8.4 Neutral overvoltage (ANSI 59N, IEC PTOV)
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  VOLTAGE ELEMENTS  NEUTRAL OV1(3)
 NEUTRAL OV1

C70 CAPACITOR BANK PROTECTION AND CONTROL SYSTEM – INSTRUCTION MANUAL
PHASE OV1 BLOCK:

Off
PHASE OV1

TARGET: Self-reset
PHASE OV1

EVENTS: Disabled
Figure 5-102: Phase overvoltage logic
SETTINGS
PHASE OV1 PICKUP
DELAY:
SETTING
PHASE OV1 PHASE OV1 RESET
PICKUP: DELAY:
RUN t PKP
VAB PICKUP ≥
RUN
t PKP
VBC ≥ PICKUP
RUN
VCA PICKUP ≥
t PKP
NEUTRAL OV1

FUNCTION: Disabled
NEUTRAL OV1 SIGNAL

SOURCE: SRC 1
NEUTRAL OV1 PICKUP:

0.300 pu
NEUTRAL OV1 CURVE:

Definite time
NEUTRAL OV1 PICKUP:

DELAY: 1.00 s
NEUTRAL OV1 RESET:

DELAY: 1.00 s
NEUTRAL OV1 BLOCK:

Off
Range: FlexLogic Operand
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
t RST
t RST
t RST
V >
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4, SRC 5, SRC 6
Range: 0.000 to 3.000 pu in steps of 0.001
Range: Definite time, FlexCurve A, FlexCurve B,
FlexCurve C
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
GROUPED ELEMENTS
FLEXLOGIC OPERANDS
PHASE OV1 A PKP
PHASE OV1 A DPO
PHASE OV1 A OP
PHASE OV1 B PKP
PHASE OV1 B DPO
PHASE OV1 B OP
PHASE OV1 C PKP
PHASE OV1 C DPO
PHASE OV1 C OP
FLEXLOGIC OPERAND
PHASE OV1 OP
OR
FLEXLOGIC OPERAND
AND PHASE OV1 DPO
FLEXLOGIC OPERAND
OR PHASE OV1 PKP
827066A7.CDR
for V , V ,
3 Pickup ×
AB BC
5-203
5