MCCB or ACB
MCCB or ACB
(OP)
In substation we usually consider 400v AC for internal feeding of S/S.
consultants suggest us to use ACB (Air circuit Breacker) for incoming feeder and MCCB (molded case circuit breaker ) for outgoing feeder.
Does anybody know why?
why we dont use mccb for incoming?
(if it is needed i can attach related drawing)
consultants suggest us to use ACB (Air circuit Breacker) for incoming feeder and MCCB (molded case circuit breaker ) for outgoing feeder.
Does anybody know why?
why we dont use mccb for incoming?
(if it is needed i can attach related drawing)






RE: MCCB or ACB
ACB is more rugged and maintainable. Also all loads on that switchboard depend on the main, it is nice to make it more reliable and needing to replace it so often.
ICCB (insulated case breakers) may be other choice, but they are merely glorified MCCB as they also do not have short time ratings.
Rafiq Bulsara
http://www.srengineersct.com
RE: MCCB or ACB
Rafiq Bulsara
http://www.srengineersct.com
RE: MCCB or ACB
RE: MCCB or ACB
RE: MCCB or ACB
A procedure of locking out and placing identifying tags on the devices for safety. A critical part of maintenance and repair procedures.
Rafiq Bulsara
http://www.srengineersct.com