5-222 D30 Line Distance Protection System GE Multilin5.7 CONTROL ELEMENTS 5 SETTINGS5The maximum number of autoreclosure elements available is equal to the number of installed CT banks.The autoreclosure feature is intended for use with transmission and distribution lines, in three-pole tripping schemes for sin-gle breaker applications. Up to four selectable reclosures ‘shots’ are possible prior to locking out. Each shot has an inde-pendently settable dead time. The protection settings can be changed between shots if so desired, using FlexLogic. Logicinputs are available for disabling or blocking the scheme.Faceplate panel LEDs indicate the state of the autoreclose scheme as follows:• Reclose Enabled: The scheme is enabled and may reclose if initiated.• Reclose Disabled: The scheme is disabled.• Reclose In Progress: An autoreclosure has been initiated but the breaker has not yet been signaled to close.• Reclose Locked Out: The scheme has generated the maximum number of breaker closures allowed and, as the faultpersists, will not close the breaker again; known as ‘Lockout’. The scheme may also be sent in ‘Lockout’ when theincomplete sequence timer times out or when a block signal occurs while in ‘reclose in progress’. The scheme must bereset from Lockout in order to perform reclose for further faults.The reclosure scheme is considered enabled when all of the following conditions are true:• The AR1 FUNCTION is set to “Enabled”.• The scheme is not in the ‘Lockout’ state.• The ‘Block’ input is not asserted.• The AR1 BLK TIME UPON MNL CLS timer is not active.The autoreclose scheme is initiated by a trip signal from any selected protection feature operand. The scheme is initiatedprovided the circuit breaker is in the closed state before protection operation.The reclose-in-progress (RIP) is set when a reclosing cycle begins following a reclose initiate signal. Once the cycle is suc-cessfully initiated, the RIP signal will seal-in and the scheme will continue through its sequence until one of the followingconditions is satisfied:• The close signal is issued when the dead timer times out, or• The scheme goes to lockout.While RIP is active, the scheme checks that the breaker is open and the shot number is below the limit, and then beginsmeasuring the dead time.Each of the four possible shots has an independently settable dead time. Two additional timers can be used to increase theinitial set dead times 1 to 4 by a delay equal to AR1 DELAY 1 or AR1 DELAY 2 or the sum of these two delays depending on theselected settings. This offers enhanced setting flexibility using FlexLogic operands to turn the two additional timers “on” and“off”. These operands may possibly include AR1 SHOT CNT =n , SETTING GROUP ACT 1 , etc. The autoreclose provides up tomaximum 4 selectable shots. Maximum number of shots can be dynamically modified through the settings AR1 REDUCEMAX TO 1 (2, 3), using the appropriate FlexLogic operand.Scheme lockout blocks all phases of the reclosing cycle, preventing automatic reclosure, if any of the following occurs:• The maximum shot number was reached.• A ‘Block’ input is in effect (for instance; Breaker Failure, bus differential protection operated, etc.).MESSAGE AR1 DELAY 2:0.000 sRange: 0.00 to 655.35 s in steps of 0.01MESSAGE AR1 RESET LOCKOUTDELAY: 60.000Range: 0.00 to 655.35 s in steps of 0.01MESSAGE AR1 RESET TIME:60.000 sRange: 0.00 to 655.35 s in steps of 0.01MESSAGE AR1 INCOMPLETE SEQTIME: 5.000 sRange: 0.00 to 655.35 s in steps of 0.01MESSAGE AR1 EVENTS:DisabledRange: Disabled, Enabled
