Doble Testing

[mmchugh2]

Good morning! I'm being informed that Doble power testing has been deemed destructive to Gen-sets by our insurance carrier. Where are the facts?
Thanks!

 

[electricpete]

I wouldn't consider it destructive myself of course.

Typical Doble test is conducted at or below nominal line to neutral voltage. That means the neutral sees more voltage than it would in operation. That could be an objection.


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(2B)+(2B)' ?