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A device, components, or safety measure designed to protect circuits from overvoltage, overcurrent, a combination of these; or the theory of same.

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Selecting 2 pole branch circuit protection

I am trying to select a 2 pole circuit protector (UL489 approved), to protect a 575V transformer. I am however unable to find any 2 pole CB that go above a 480Vac voltage rating. Is there anything I'm …
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