GE Multilin
T60 Transformer Protection System
5-221
5 SETTINGS
5.6 GROUPED ELEMENTS
5
d) NEUTRAL OVERVOLTAGE
(ANSI 59N)
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 5–119: 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, SRC 5, SRC 6
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
Содержание UR T60
Страница 10: ...x T60 Transformer Protection System GE Multilin TABLE OF CONTENTS ...
Страница 14: ...xiv T60 Transformer Protection System GE Multilin 0 1 BATTERY DISPOSAL 0 BATTERY DISPOSAL 0 ...
Страница 34: ...1 20 T60 Transformer Protection System GE Multilin 1 5 USING THE RELAY 1 GETTING STARTED 1 ...
Страница 436: ...5 298 T60 Transformer Protection System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Страница 492: ...8 18 T60 Transformer Protection System GE Multilin 8 3 ENERVISTA SECURITY MANAGEMENT SYSTEM 8 SECURITY 8 ...
Страница 510: ...9 18 T60 Transformer Protection System GE Multilin 9 6 COMMISSIONING TEST TABLES 9 COMMISSIONING 9 ...
Страница 678: ...C 30 T60 Transformer Protection System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Страница 688: ...D 10 T60 Transformer Protection System GE Multilin D 1 IEC 60870 5 104 PROTOCOL APPENDIX D D ...
Страница 700: ...E 12 T60 Transformer Protection System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...