ARC FLASH LINE SIDE PROTECTION
ARC FLASH LINE SIDE PROTECTION
(OP)
I am trying to protect the line side of the switchboard, I tried to change the setting of HV really above the transformer but it seems to cause instability. Does any one know any thing practically or theoretically how to protect the line between the switchgear and transformer.






RE: ARC FLASH LINE SIDE PROTECTION
RE: ARC FLASH LINE SIDE PROTECTION
Other options might be use of "maintenance mode" settings on the primary relay, or installing CTs and relays on the LV side of the transformer and using these relays to trip the primary breaker.
RE: ARC FLASH LINE SIDE PROTECTION
For source side we try to include in the differential zone of the transformer.
RE: ARC FLASH LINE SIDE PROTECTION
RE: ARC FLASH LINE SIDE PROTECTION
RE: ARC FLASH LINE SIDE PROTECTION
RE: ARC FLASH LINE SIDE PROTECTION
Given, if installed wrong it could misoperate for an inrush event.
Better to install with over currents on X bushings of transformer to avoid inrush. But you would still trip high side breaker.