GE D60 Instruction Manual page 491

CHAPTER 5: SETTINGS
— This setting selects a FlexLogic operand that represents manual close command to a breaker
AR BKR MAN CLOSE
associated with the autoreclose scheme.
— The autoreclose scheme can be disabled for a programmable time delay after an associated
AR BLK TIME UPON MAN CLS
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.
— This setting selects a FlexLogic operand that is intended to initiate single-pole autoreclosure.
AR 1P INIT
— This setting selects a FlexLogic operand that is intended to initiate three-pole autoreclosure, first timer (
AR 3P INIT
) that can be used for a high-speed autoreclosure.
DEAD TIME 1
— This setting selects a FlexLogic operand intended to initiate three-pole autoreclosure. second timer (
AR 3P TD INIT
) can be used for a time-delay autoreclosure. If the operand assigned to this setting and the
DEAD TIME 2
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
— This setting selects a FlexLogic operand that indicates a multi-phase fault. Set the operand value to
AR MULTI-P FAULT
zero for single-phase to ground faults.
— This setting selects a FlexLogic operand that indicates that the breaker has opened correctly
BKR ONE POLE OPEN
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.
— This setting selects a FlexLogic operand that indicates that the breaker has opened three pole and the
BKR 3 POLE OPEN
autoreclose scheme can start timing the three pole dead time. The scheme has a pre-wired input that indicates breaker
status.
— This is the dead time following the first three pole trip. This intentional delay can be used for a high-
AR 3-P DEAD TIME 1
speed three-pole autoreclose. Set it longer than the estimated de-ionizing time following the three-pole trip.
— This is the dead time following the second three-pole trip or initiated by the
AR 3-P DEAD TIME 2
intentional delay is typically used for a time delayed three-pole autoreclose (as opposed to high speed three-pole
autoreclose).
— This setting represents the dead time following the third three-pole trip.
AR 3-P DEAD TIME 3
— This setting represents the dead time following the fourth three-pole trip.
AR 3-P DEAD TIME 4
— This setting selects an operand that adapts the duration of the dead time for the first shot to the
AR EXTEND DEAD T 1
possibility of non-simultaneous tripping at the two line ends. Typically this is the operand set when the communication
channel is out of service.
— This timer sets the length of the dead time 1 extension for possible non-simultaneous tripping
AR DEAD TIME 1 EXTENSION
of the two ends of the line.
— This setting selects the operand that forces the autoreclose scheme from any state to reset. Typically this is a
AR RESET
manual reset from lockout, local, or remote.
— A reset timer output resets the recloser following a successful reclosure sequence. The setting is based on
AR RESET TIME
the breaker time that is the minimum time required between successive reclose sequences.
— This setting selects an operand that indicates that the breakers are closed at the end of the reset time
AR BKR CLOSED
and the scheme can reset.
— This setting selects the operand that blocks the autoreclose scheme (it can be a sum of conditions, such as
AR BLOCK
time delayed tripping, breaker failure, and bus differential protection. If the block signal is present before autoreclose
scheme initiation, the
AR DISABLED
the scheme is sent to lockout.
— The pause input offers the ability to freeze the autoreclose cycle until the pause signal disappears. This can be
AR PAUSE
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
D60 LINE DISTANCE PROTECTION SYSTEM – INSTRUCTION MANUAL
operand.
AR 3P INIT
FlexLogic operand is set. If the block signal occurs when the scheme is in the RIP state,
CONTROL ELEMENTS
AR 3P
AR 3P
setting
AR 3P INIT
input. This
AR 3P TD INIT
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