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suniljayarajan
Mar 8, 2009, 03:51 AM
I want to make a starter panel for 3 Kw

So what should be the rating of MCCB, contactor, and OLR

How can I find out its rating of the above mentioned

If the supply voltage is 220v ac

sarnian
Mar 26, 2009, 03:17 AM
Hello suniljayarajan

For current calculation it is important to know if it is star or delta wiring.

sathe1963
Apr 18, 2009, 09:15 AM
Dear Sunil,

Your equipment is 3 kw at 220 v ac. Hence motor current would be @ 13.6 Ampere at full load.
You would require 10 to 16 ampere MPCB, instead of MCCB. Contactor range available is 18 ampere. LC1D18 of merlin gerin make.