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Answer Posted / bala
Selecting main cb rating depends on the type of load if it
is combination of small loads (upto 10kw) 400amps mccb is
enough.
1. if it is one motor load. first we have consider what
type of starter we are going to use. in case of star delta
starter select 600amps mccb. in case of VFD and softstarter
400amps mccb is enough.
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