5-290
L90 Line Current Differential System
GE Multilin
5.7 CONTROL ELEMENTS
5 SETTINGS
5
The
OPEN POLE REM CURR PKP
setting specifies pickup level for the remote-end current estimated by the relay as the local
current compensated by the calculated charging current. The latter is calculated based on the local voltages and the capac-
itive reactances of the line. This setting is relevant if open pole condition at the remote end of the line is to be sensed and
utilized by the relay (
OPEN POLE REM OP
FlexLogic operand).
The
OPEN POLE MODE
setting selects the mode of operation of the open pole function. When the “Accelerated” mode is cho-
sen, an open pole will be declared ½ cycle after trip output operation and before the breaker pole opens. This blocks dis-
tance loops involved in the faulted phase and phase selector, and arms the trip output to produce three-pole trip for the next
fault. If the fault evolves into multi-phase fault before breaker pole opens for the first fault, the remaining in-service distance
loops would initiate a three-pole trip. When the “Traditional” mode is selected, then an open pole is declared only after the
breaker opens and current disappears. If the fault evolves into a multi-phase fault before the circuit breaker pole opens for
the first fault, the phase selector will change the fault type from a single-line-to-ground fault to a multi-phase fault, thereby
initiating a three-pole trip.
The
OPEN POLE DETECTION
setting selects the signals used to detect an open pole condition. When “I AND V AND CBaux”
value is selected, the breaker 52 contacts and the current with optional voltage signals are used to determine open pole
conditions. For the “I AND V only” selection, only the current with optional voltage signals are used.
For convenience, the position of the breaker poles defined in the breaker control feature and available as FlexLogic oper-
and
BREAKER 1
Φ
A CLSD
through
BREAKER 1
Φ
C CLSD
and
BREAKER 1 OOS
are used by the open pole feature if the “I AND
V AND CBaux” detection value is selected.
For correct operation of the open pole detector, the breaker control, trip output, and single-pole autoreclose features must
be enabled and configured properly. When used in configuration with only one breaker, the
BREAKER 2 FUNCTION
should be
“Enabled” and the
BREAKER 2 OUT OF SV
setting should be “On” (refer to the
Breaker Control
section earlier in this chapter
for additional details).
Summary of Contents for UR Series L90
Page 652: ...A 16 L90 Line Current Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 772: ...B 120 L90 Line Current Differential System GE Multilin B 4 MEMORY MAPPING APPENDIX B B ...
Page 802: ...C 30 L90 Line Current Differential System GE Multilin C 7 LOGICAL NODES APPENDIX C C ...
Page 812: ...D 10 L90 Line Current Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...
Page 824: ...E 12 L90 Line Current Differential System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...
Page 834: ...F 10 L90 Line Current Differential System GE Multilin F 3 WARRANTY APPENDIX F F ...
Page 846: ...xii L90 Line Current Differential System GE Multilin INDEX ...