GE Multilin 350 Series Instruction Manual

Also see for ML Series 350: Communications manual User manual Communications manual Instruction manual

CHAPTER 6: SETPOINTS S4 CONTROL350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL 6–696.5.7 AutorecloserThe automatic recloser is intended for use on single three-pole tripping breakerapplications. Up to four reclosing “shots” can be programmed with independent set ofprotection elements for initiation, and individual dead time prior to each subsequent shot.A typical example for selection of individual set of overcurrent protection elements forinitiation is the selection of instantaneous overcurrent protections for the first AR initiation,and selection of time overcurrent protections after the first reclose. This would providelonger time before the breaker opens, and allow the fuses to burn off, if the fault is stillpresent.NOTENOTE:To synchronize the Reclose function with the breaker status feedback, it is recommendedthat a debounce of 2 cycles is used, regardless of whether the breaker status is detectedusing one or both contacts.The following path is available using the keypad. For instructions on how to use thekeypad, please refer to Section 3.1.2.1 - Working with the Keypad.PATH: SETPOINTS > S4 CONTROLS > AUTORECLOSE > AR SETUPAR FUNCTIONRange: Disabled, EnabledDefault: DisabledThis setting enables or disables the Autorecloser function.NUMBER OF SHOTSRange: 1 to 4, step 1Default: 1The maximum number of reclosures that will be attempted before AR Not Ready.DEAD TIME SHOT 1 to 4Range: 0.1 to 600.0 s, step 0.1 sDefault: 1.0 sThis setting specifies the dead time delay before each reclosure. Four time delay settingsare to be configured and used to time out before the first, second, third, or fourthbreaker reclosure.RST N/READY TIMERange: 0.1 to 600.0 s, step 0.1 sDefault: 10 sThis setting specifies the reset AR Not Ready time. Upon breaker close, the timer timesout, and resets the AR lockout.INCOMP SEQ TIMERange: 0.1 to 600.0 s, step 0.1 sDefault: 5.0 sThis timer is used to set the maximum time interval allowed for single reclosure shot. Thetimer starts timing out for both situations: upon AR initiate to open the breaker, wherethe breaker doesn’t open, or whenever breaker reclose command is issued, where thebreaker doesn’t close. Upon incomplete sequence time expiry, the AR goes into AR NotReady mode.RESET TIMERange: 0.1 to 600.0 s, step 0.1 sDefault: 5.0 sThis time is used to reset the AR into AR ready mode after successful reclosure. If nobreaker tripping occurs within the reset time, the AR shot counter is reset.