GE D60 Instruction Manual page 237

5 SETTINGS
d) NEUTRAL OVERVOLTAGE (ANSI 59N)
PATH: SETTINGS GROUPED ELEMENTS
NEUTRAL OV1
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There are three neutral overvoltage elements available. The neutral overvoltage element can be used to detect asymmetri-
cal 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 volt-
age channels entered under
SETTINGS
p.u. base used when setting the pickup level.
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
the setting is "Definite time". The source assigned to this element must be configured for a phase
NEUTRAL OV1(3) CURVE
VT.
VT errors and normal voltage unbalance must be considered when setting this element. This function requires the VTs to
be Wye connected.
GE Multilin
SETTING GROUP 1(6)
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
SYSTEM SETUP
Figure 5–90: NEUTRAL OVERVOLTAGE1 SCHEME LOGIC
D60 Line Distance Relay
VOLTAGE ELEMENTS
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
AC INPUTS VOLTAGE BANK
NEUTRAL OV1(3) PICKUP DELAY
5.5 GROUPED ELEMENTS
NEUTRAL OV1(3)
is the
PHASE VT SECONDARY
setting applies only if
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