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Isolation Transformer vs. 3-Phase Breaker

Isolation Transformer vs. 3-Phase Breaker

Isolation Transformer vs. 3-Phase Breaker

(OP)
I recently found a breaker on a three-phase system where if one phase trips, the other two phases won't trip. I was told by someone, "There is an isolation transformer connected to the circuit breaker which eliminates the risk of one phase being live if any of the phases trip"

Does this make sense to any of you?

RE: Isolation Transformer vs. 3-Phase Breaker

No. For a three-phase feeder, all three poles need to open.

RE: Isolation Transformer vs. 3-Phase Breaker

(OP)
That is my thought as well however do you have any idea why they would make that statement about the isolation transformer for a 3-wire 3-phase system?

RE: Isolation Transformer vs. 3-Phase Breaker

Because they have no idea what they are talking about?

From my experience some people think transformers are mystical devices to which they proscribe all sorts of properties that defy the laws of physics.

"Will work for (the memory of) salami"

RE: Isolation Transformer vs. 3-Phase Breaker

Trip one of the three phases, and then tell that person to go lick the secondary conductors. Tell us what happens shocked

SceneryDriver

RE: Isolation Transformer vs. 3-Phase Breaker

(OP)
Will do. At least one of us will learn a lesson :)

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