how did we can select MCB selection?

[techsudheer]

plz help me,
how did we select MCB ? plz give me formulae...... ex: 10kva 3ph-1ph out stablizer with output 110vac ... wat is the rating of MCB input side as well as output side

 

[chuckey]

To protect your stabilizer and its supply wiring you need an MCB at the source end rated at 10kva/phase current +10%. On the output side, the same argument, if its feeding a single 10kva load then 100A would do. If its feeding multiple circuits then each circuit should have an MCB rated for each one and its individual cabling.
Frank

 

[kak111]

Collected Knowledge package on circuit and wiring protection............

A guide to the selection of electrical cable and breakers
Kevin Boone's Web site

**broken link removed**

Coordination tables
**broken link removed**

General selection guide
ABB Product Selection Guide | Contactors Circuit Breakers Relays Capacitors Switches Power Supplies PLC Timers

http://www.clrwtr.com/PDF/ABB-Controls/ABB-S200-Miniature-Circuit-Breakers.pdf

Circuit Protection Devices