Youtor
How to Calculate CircuitBreaker Rating Circuit breaker amp size
>> YOUR LINK HERE: ___ http://youtube.com/watch?v=QRl4vl6KVp8
How to Calculate Circuit-Breaker Rating: • Example: • Motor – 40 kw • Voltage – 380 V • Power Factoe-0.8 • Circuit Breaker-? • Answer: • First we Convert KW to KVA • KVA = KW/ P.F. • KVA = 40/0.8 • KVA = 50 • Now we calculate current rating • Current (I) = Conneted Load/√3 x Voltage • Current (I) = 50 x 1000/√3 x 380 • Current (I) = 75.96 A • Circuit Breaker = Current x 25 % Safety Factor • Circuit Breaker = I x 1.25 • = 75.96 x 1.25 • = 94.5 A • Cicuit Breaker will be100 A • Facebook Page:- • https://www.facebook.com/Be-A-Enginee...
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