# MCCB Selection

 I have 3 phase 220V domestic power supply to my home by 16 mm aluminium 4 core armored cable. I have a sanction of 15KW load. With a concern for safety I intend to retrofit a MCCB of suitable rating. Request you to please guide me with respect to Amperage, Icu 240V, Icu 410V & Ics 415 V ratings required for the MCCB. Let me know if you require any additional information. asked 4/19/2016 Sandeep Dogra2

 kVA = kW/0.8P.F kVA = 15/0.8 kVA = 18.75kVA I = kVA/(1.732x415V) I = 18.75/718.78 I = 0.0260kA I = 26A I = 26A x 1.2 (overload factor) I (MCCB,TP) = 32A   Icu = 10kA and Ics = 6kA will be more then enough. 32A MCCB, TP as Incoming breaker  Further outgoing breakers for 220V system could be MCCB's, DP or SP as per requirement. answered 1/29/2017 حسان نوابی 2 Hi friend,             As per your given details MCCB is not required MPCB is enough. But you have MCCB for this load you chose the 50 A MCCB for 220 V. For 415 V 32 A MCCB is enough.      I=P/(SQRT(3)*220*0.85))       You take your loads I=15000/(1.732*220*0.85) it comes 46 A you take 15% extra 50 A MCCB is enough. answered 6/16/2016 Dinesh137 2

In order to provide an answer to this question, you must Login

## I am flagging this question because...

10 inform moderator flags remaining

## I am flagging this answer because...

10 inform moderator flags remaining

## Flagging a Post

You have already flagged this post. Clicking "Remove Flag" below will remove your flag, thus reducing the count by one as well.

## Latest Questions:

Our website uses cookies so that we can provide a better experience.