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Autoreclose - GE L60 Instruction Manual

Line phase comparison system, ur series.
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5.6 CONTROL ELEMENTS
BKR ONE POLE OPEN: This setting selects a FlexLogic™ operand which indicates that the breaker has opened cor-
rectly 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 should trip single pole and breaker 2 should trip 3 pole).
The scheme has a pre-wired input that indicates breaker status.
BKR 3 POLE OPEN: This setting selects a FlexLogic™ operand which 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 indi-
cates 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. However, it should be set 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
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 third three-pole trip.
AR EXTEND DEAD T 1: This setting selects an operand that will adapt 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 communi-
cation channel is out of service
AR DEAD TIME 1 EXTENSION: This timer is used to set 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
5
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 which 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, bus differential protection, etc.). If the block signal is present before autore-
close scheme initiation the
is in the RIP state the scheme will be sent to lockout.
AR PAUSE: The pause input offers the ability to freeze the autoreclose cycle until the pause signal disappears. This
may 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. When the pause signal disappears the autoreclose
cycle is resumed. This feature can also be used when a transformer is tapped from the protected line and a reclose is
not desirable until it is disconnected from the line. In this situation, the reclose scheme is paused until the transformer
is disconnected.
AR INCOMPLETE SEQ TIME: This timer is used to set the maximum time interval allowed for a single reclose shot. It
is started whenever a reclosure is initiated and is active until the
ditions allowing a breaker closure are not satisfied when this time expires, the scheme goes to "Lockout". The mini-
mum permissible setting is established by the
wait time for the breaker to open so that the reclose cycle can continue and/or for the
allow the reclose cycle to continue and/or for the
to be sent.
AR BLOCK BKR2: This input selects an operand that will block the reclose command for breaker 2. This condition can
be for example: breaker low air pressure, reclose in progress on another line (for the central breaker in a breaker and
a half arrangement), or a sum of conditions combined in FlexLogic™.
AR CLOSE TIME BKR2: This setting represents the closing time for the breaker 2 from the moment the 'Close' com-
mand is sent to the moment the contacts are closed.
AR TRANSFER 1 TO 2: This setting establishes how the scheme performs when the breaker closing sequence is 1-2
and breaker 1 is blocked. When set to "Yes" the closing command will be transferred direct to breaker 2 without waiting
5-262
FlexLogic™ operand will be set. If the block signal occurs when the scheme
AR DISABLED
AR 3-P DEAD TIME 2
AR BKR1 BLK
L60 Line Phase Comparison System
or
CLOSE BKR1
CLOSE BKR2
timer setting. Settings beyond this will determine the
AR PAUSE
signal to disappear and allow the
5 SETTINGS
input.
AR 3P TD INIT
signal is sent. If all con-
signal to reset and
signal
AR CLOSE BKR1
GE Multilin

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