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Thread: Transformer triggers circuit breaker, need a solution

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    Default Transformer triggers circuit breaker, need a solution

    Hi all. Recently I bought a 3KVA variac and a 7.5KVA 220V/110V isolated transformer in order to include 110V efficiency and regulation test in my reviews. During experiment these transformers often trigger the 16A circuit breaker in my house (sometimes don't, though). I guess it's due to an excessive magnetizing current. The problem is I can't change the circuit breaker. Is there a way to suppress that inrush current and reduce the chance of triggering the circuit breaker?
    It's been a hard day's night and I've been working like a dog.

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    Without changing the breaker, unlikely. Sorry,

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