GE Multilin
C60 Breaker Protection System
5-197
5 SETTINGS
5.6 GROUPED ELEMENTS
5
d) NEUTRAL OVERVOLTAGE
(ANSI 59N, IEC PTOV)
PATH: SETTINGS
GROUPED ELEMENTS
SETTING GROUP 1(6)
VOLTAGE ELEMENTS
NEUTRAL OV1(3)
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
SYSTEM SETUP
AC INPUTS
VOLTAGE BANK
PHASE VT SECONDARY
is the
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
NEUTRAL OV1 PICKUP DELAY
setting applies only if
the
NEUTRAL OV1 CURVE
setting is “Definite time”. The source assigned to this element must be configured for a phase VT.
VT errors and normal voltage unbalance must be considered when setting this element. This function requires the VTs to
be wye-connected.
Figure 5–82: NEUTRAL OVERVOLTAGE1 SCHEME LOGIC
NEUTRAL OV1
NEUTRAL OV1
FUNCTION: Disabled
Range: Disabled, Enabled
MESSAGE
NEUTRAL OV1 SIGNAL
SOURCE: SRC 1
Range: SRC 1, SRC 2, SRC 3, SRC 4
MESSAGE
NEUTRAL OV1 PICKUP:
0.300 pu
Range: 0.000 to 3.000 pu in steps of 0.001
MESSAGE
NEUTRAL OV1 CURVE:
Definite time
Range: Definite time, FlexCurve A, FlexCurve B,
FlexCurve C
MESSAGE
NEUTRAL OV1 PICKUP:
DELAY: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01
MESSAGE
NEUTRAL OV1 RESET:
DELAY: 1.00 s
Range: 0.00 to 600.00 s in steps of 0.01
MESSAGE
NEUTRAL OV1 BLOCK:
Off
Range: FlexLogic operand
MESSAGE
NEUTRAL OV1 TARGET:
Self-reset
Range: Self-reset, Latched, Disabled
MESSAGE
NEUTRAL OV1 EVENTS:
Disabled
Range: Disabled, Enabled
827848A3.CDR
FLEXLOGIC OPERANDS
NEUTRAL OV1
FUNCTION:
NEUTRAL OV1 BLOCK:
NEUTRAL OV1 SIGNAL
SOURCE:
NEUTRAL OV1 PICKUP:
NEUTRAL OV1 DPO
NEUTRAL OV1 OP
NEUTRAL OV1 PKP
RUN
AND
SETTING
SETTING
NEUTRAL OV1 RESET
DELAY :
NEUTRAL OV1 PICKUP
DELAY :
SETTING
Enabled=1
t
PKP
t
RST
SETTING
SETTING
Off=0
ZERO SEQ VOLT (V_0)
3V_0 Pickup
<
NEUTRAL OV1 CURVE :
t
Summary of Contents for C60
Page 10: ...x C60 Breaker Protection System GE Multilin TABLE OF CONTENTS ...
Page 30: ...1 20 C60 Breaker Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Page 420: ...5 284 C60 Breaker Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 466: ...8 4 C60 Breaker Protection System GE Multilin 8 1 FAULT LOCATOR 8 THEORY OF OPERATION 8 ...
Page 478: ...9 12 C60 Breaker Protection System GE Multilin 9 6 DISPOSAL 9 MAINTENANCE 9 ...
Page 492: ...A 14 C60 Breaker Protection System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 648: ...E 10 C60 Breaker Protection System GE Multilin E 1 OVERVIEW APPENDIX E E ...
Page 660: ...F 12 C60 Breaker Protection System GE Multilin F 2 DNP POINT LISTS APPENDIX F F ...
Page 670: ...H 8 C60 Breaker Protection System GE Multilin H 2 ABBREVIATIONS APPENDIX H H Z Impedance Zone ...
Page 672: ...H 10 C60 Breaker Protection System GE Multilin H 3 WARRANTY APPENDIX H H ...
Page 682: ...x C60 Breaker Protection System GE Multilin INDEX ...