Posts Tagged ‘short circuit’

Cutler Hammer HND312T33W Circuit Breaker Interrupts 65,000 Amps

February 18th, 2011 1 comment

MIDWEST had a call from a purchasing agent for a manufacturing plant. He was suppose to purchase a 1200 amp Cutler Hammer circuit breaker that he was told could handle 65,000 amps. All he knew was, he had a

Cutler Hammer HND312T33W Circuit Breakers For Sale

Cutler Hammer HND312T33W Circuit Breakers For Sale

bunch of numbers and when he asked about one of them he was told it meant the breaker could carry 65,000 amps. He was confused and really stressed because he had no idea what to order, but he knew he was getting some bad information. He wanted to order a Cutler Hammer HND312T33W circuit breaker. He wanted to be sure he was getting the right thing and then just move on. He was very busy and this request was just overwhelming. We explained in basic terms the circuit breaker was rated to handle 1200 amps. Anything more and it would eventually trip. The 65,000 amp rating just meant, if there was a terrible sudden short circuit where 1000s of amps flowed through the breaker for a fraction of a second, the breaker would safely trip and interrupt the current, as long as it was 65,000 amps or less. If it was more than 65,000 amps, the breaker might not interrupt the flow of current. The breaker might fail, with a loud blast. Or worse yet, someone could get seriously injured. It is a little scary how often some folks are given the huge responsibility to located electrical equipment when they have such limited information. Fortunately, MIDWEST specializes in taking care of just such calls.  Our switchgear personnel have decades of hands on experience with Cutler Hammer circuit breakers, Square D circuit breakers and many others. They know more than just the numbers. This is so critical when a customer calls and has poor or even wrong information. We want everyone to be safe.