GE L60 Instruction Manual

Also see for L60: Communications manual Communications guide Instruction manual Instruction manual Instruction manual

Contents

5-276 L60 Line Phase Comparison System GE Multilin5.6 CONTROL ELEMENTS 5 SETTINGS5manual closing. If the autoreclose scheme is not initiated after a manual close and this time expires the autoreclosescheme 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 (AR3P 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 3PINIT setting are asserted simultaneously, then autoreclose will not activate the first and second shot timers at the sametime. 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. The operand valueshould be zero for single-phase to ground faults.• 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 poleand the autoreclose scheme can start timing the three pole dead time. The scheme has a pre-wired input that indicatesbreaker 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 ahigh-speed three-pole autoreclose. However, it should be set longer than the estimated de-ionizing time following thethree-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-poleautoreclose).• 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 shotto 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 thisis 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 isbased 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 resettime and the scheme can reset.• AR BLOCK: This setting selects the operand that blocks the autoreclose scheme (it can be a sum of conditions suchas: time delayed tripping, breaker failure, bus differential protection, etc.). If the block signal is present before autore-close scheme initiation the AR DISABLED FlexLogic operand will be set. If the block signal occurs when the scheme isin 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. Thismay be done when a trip occurs and simultaneously or previously, some conditions are detected such as out-of step orloss of guard frequency, or a remote transfer trip signal is received. When the pause signal disappears the autoreclosecycle is resumed. This feature can also be used when a transformer is tapped from the protected line and a reclose isnot desirable until it is disconnected from the line. In this situation, the reclose scheme is paused until the transformeris disconnected.• AR INCOMPLETE SEQ TIME: This timer is used to set the maximum time interval allowed for a single reclose shot. Itis started whenever a reclosure is initiated and is active until the CLOSE BKR1 or CLOSE BKR2 signal is sent. If all con-ditions allowing a breaker closure are not satisfied when this time expires, the scheme goes to “Lockout”. The mini-