In our project we have 6 x 500 KVA DG sets with a Synchronization Panel, Sync. Panel has Comap Controller with SCADA for parallel operation of all 6 Nos. of DG sets. All the incoming ACB's are 800Amps 3 pole with a Neutral Contactor. all neutral earth pits (12 Nos - each two for 1 DG set) are directly connected to sync. panel common bus bar (neutral) of synchronization panel. from the common bus bar the neutral is routed through a neutral contactor to the DG Sets, at the time of operation any one of the DG Sets Neutral Contactor will be in 'ON' position, all other DG sets will work on floating mode. as per the comap controller master DG sets Neutral contactor will be in 'ON" position at the time of parallel operation. for more than a year it was working fine, now a days we are facing a problem with neutral contactor shifting at the time of parallel operation. whenever all DG starts, the master DG neutral contactor will 'ON" initially after few minutes the neutral contactor is automatically switching over to another follower DG set with out any manual command, sometimes at the time interchanging two DG's neutral contactor making hevay chattering noise continuously for more than 20 seconds, and not at all closing and incoming ACB is automatically tripping. i need help from all of you to solve the issue.
Synchronization Panel Neutral Contactor Related
Re: Synchronization Panel Neutral Contactor Related
