C.B Ratings
C.B Ratings
(OP)
Dear Friends
My question is as follows:
In medium voltage switchgears , why are designers rating their service breakers very much higer than maximum rated current required for full load.
If they intend to supply a 1 MVA load at 11KV they might use 630A breackers or higher ?
Actually we do'nt see less than 400A breackers.
Regards
am1960
My question is as follows:
In medium voltage switchgears , why are designers rating their service breakers very much higer than maximum rated current required for full load.
If they intend to supply a 1 MVA load at 11KV they might use 630A breackers or higher ?
Actually we do'nt see less than 400A breackers.
Regards
am1960






RE: C.B Ratings
Economics of manufacturing and demand plays a role too, while deciding typical standard ratings. Designers only select from what is available.
Rafiq Bulsara
http://www.srengineersct.com