GE L90, Инструкция по эксплуатации

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CHAPTER 5: SETTINGS CONTROL ELEMENTS
L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL 5-405
5
AR BKR MAN CLOSE
— This setting selects a FlexLogic operand that represents manual close command to a breaker
associated with the autoreclose scheme.
AR BLK TIME UPON MAN CLS
— The autoreclose scheme can be disabled for a programmable time delay after an associated
circuit breaker is manually commanded to close, preventing reclosing onto an existing fault such as grounds on the line.
This delay must be longer than the slowest expected trip from any protection not blocked after manual closing. If the
autoreclose scheme is not initiated after a manual close and this time expires the autoreclose scheme is set to the reset
state.
AR 1P INIT
— This setting selects a FlexLogic operand that is intended to initiate single-pole autoreclosure.
AR 3P INIT
— This setting selects a FlexLogic operand that is intended to initiate three-pole autoreclosure, first timer (
AR 3P
DEAD TIME 1
) that can be used for a high-speed autoreclosure.
AR 3P TD INIT
— This setting selects a FlexLogic operand intended to initiate three-pole autoreclosure. second timer (
AR 3P
DEAD TIME 2
) can be used for a time-delay autoreclosure. If the operand assigned to this setting and the
AR 3P INIT
setting
are asserted simultaneously, then autoreclose does not activate the first and second shot timers at the same time.
Instead, the priority is given to the
AR 3P INIT
operand.
AR MULTI-P FAULT
— This setting selects a FlexLogic operand that indicates a multi-phase fault. Set the operand value to
zero for single-phase to ground faults.
BKR ONE POLE OPEN
— This setting selects a FlexLogic operand that indicates that the breaker has opened correctly
following a single phase to ground fault and the autoreclose scheme can start timing the single pole dead time (for 1-2
reclose sequence for example, breaker 1 trips single pole and breaker 2 trips 3 pole).
The scheme has a pre-wired input that indicates breaker status.
BKR 3 POLE OPEN
— This setting selects a FlexLogic operand that indicates that the breaker has opened three pole and the
autoreclose scheme can start timing the three pole dead time. The scheme has a pre-wired input that indicates breaker
status.
AR 3-P DEAD TIME 1
— This is the dead time following the first three pole trip. This intentional delay can be used for a high-
speed three-pole autoreclose. Set it longer than the estimated de-ionizing time following the three-pole trip.
AR 3-P DEAD TIME 2
— This is the dead time following the second three-pole trip or initiated by the
AR 3P TD INIT
input. This
intentional delay is typically used for a time delayed three-pole autoreclose (as opposed to high speed three-pole
autoreclose).
AR 3-P DEAD TIME 3
— This setting represents the dead time following the third three-pole trip.
AR 3-P DEAD TIME 4
— This setting represents the dead time following the fourth three-pole trip.
AR EXTEND DEAD T 1
— This setting selects an operand that adapts the duration of the dead time for the first shot to the
possibility of non-simultaneous tripping at the two line ends. Typically this is the operand set when the communication
channel is out of service.
AR DEAD TIME 1 EXTENSION
— This timer sets the length of the dead time 1 extension for possible non-simultaneous tripping
of the two ends of the line.
AR RESET
— This setting selects the operand that forces the autoreclose scheme from any state to reset. Typically this is a
manual reset from lockout, local, or remote.
AR RESET TIME
— A reset timer output resets the recloser following a successful reclosure sequence. The setting is based on
the breaker time that is the minimum time required between successive reclose sequences.
AR BKR CLOSED
— This setting selects an operand that indicates that the breakers are closed at the end of the reset time
and the scheme can reset.
AR BLOCK
— This setting selects the operand that blocks the autoreclose scheme (it can be a sum of conditions, such as
time delayed tripping, breaker failure, and bus differential protection. If the block signal is present before autoreclose
scheme initiation, the
AR DISABLED
FlexLogic operand is set. If the block signal occurs when the scheme is in the RIP state,
the scheme is sent to lockout.
AR PAUSE
— The pause input offers the ability to freeze the autoreclose cycle until the pause signal disappears. This can be
done when a trip occurs and simultaneously or previously, some conditions are detected, such as out-of step or loss of
guard frequency, or a remote transfer trip signal is received. The pause signal freezes all four dead timers. When the pause