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All, I would like to find out how circuit breakers are rated for line voltage. I'm certain I know the answer but I need some collaborating information for a colleague. If I have a 250V per phase rated breaker, does this mean that I can use it on mains up to 250V without regard to 10% high and low line, or is this an absolute maximum? For example: In a 3ph system of 230/400Vac the 10% high line is 253/440Vac. Is this okay? Or, theoretically: If were such a utility in the world, at 250/433Vac the 10% high line would be 275/476Vac. Is this okay? thanks, -doug
Douglas E. Powell, Staff Engineer Corporate Compliance Dept. Advanced Energy Industries, Inc. Fort Collins, CO 80525 USATitle: Message
All,
I would like to find
out how circuit breakers are rated for line voltage. I'm certain I know
the answer but I need some collaborating information for a
colleague.
If I have a 250V per
phase rated breaker, does this mean that I can use it on mains up to 250V
without regard to 10% high and low line, or is this an absolute
maximum?
For example:
In a 3ph system of 230/400Vac the 10% high line is 253/440Vac. Is this
okay?
Or,
theoretically:
If were such a
utility in the world, at 250/433Vac the 10% high line would be
275/476Vac. Is this okay?
thanks,
-doug
-------------------------------------------------
Douglas E. Powell, Staff
Engineer
Corporate Compliance Dept.
Advanced Energy Industries,
Inc.
Fort Collins, CO 80525 USA
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