GE c60 Instruction Manual page 332

GROUPED ELEMENTS
SETTING
PHASE OV1
FUNCTION:
Disabled = 0
Enabled = 1
SETTING
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
5.7.7.4 Neutral overvoltage (ANSI 59N, IEC PTOV)
5
SETTINGS  GROUPED ELEMENTS  SETTING GROUP 1(6)  VOLTAGE ELEMENTS  NEUTRAL OV1(3)
 NEUTRAL OV1

There are three neutral overvoltage elements available. The neutral overvoltage element can be used to detect
asymmetrical system voltage condition due to a ground fault or to the loss of one or two phases of the source. The
element responds to the system neutral voltage (3V_0), calculated from the phase voltages. The nominal secondary
voltage of the phase voltage channels entered under
is the p.u. base used when setting the pickup level.
VT SECONDARY
The neutral overvoltage element can provide a time-delayed operating characteristic versus the applied voltage (initialized
from FlexCurves A, B, or C) or be used as a definite time element. The
NEUTRAL OV1 CURVE
5-206
Figure 5-103: Phase overvoltage logic
SETTING
PHASE OV1
PICKUP:
RUN
VAB PICKUP ≥
AND
RUN
VBC ≥ PICKUP
RUN
VCA PICKUP ≥
.
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
NEUTRAL OV1 TARGET:

Self-reset
NEUTRAL OV1 EVENTS:

Disabled
setting is "Definite time." The source assigned to this element must be configured for a phase VT.
SETTINGS
PHASE OV1 PICKUP
DELAY:
PHASE OV1 RESET
DELAY:
t PKP
t RST
t PKP
t RST
t PKP
t RST
Range: Disabled, Enabled
Range: SRC 1, SRC 2, SRC 3, SRC 4
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
Range: Self-reset, Latched, Disabled
Range: Disabled, Enabled
SETTINGS  SYSTEM SETUP  AC INPUTS  VOLTAGE BANK  PHASE
NEUTRAL OV1 PICKUP DELAY
C60 BREAKER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 5: SETTINGS
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
PHASE OV1 DPO
AND
FLEXLOGIC OPERAND
OR PHASE OV1 PKP
827066A7.CDR

V > 3 Pickup for V , V ,
AB BC
setting applies only if the