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View Poll Results: What is the zero sequence current with one phase lost?
Zero 6 60.00%
100 amps 3 30.00%
173 amps 0 0%
200 amps 0 0%
300 amps 0 0%
346 amps 0 0%
Who the hell knows? 1 10.00%
Voters: 10. You may not vote on this poll

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Old 02-08-2015, 11:50 PM   #21
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Assuming no ground faults, the current measured around all 3 or any 2, or even 1 phase conductors will be equal to the current in the neutral.

In your scenario, if the neutral is outside the zero sequence CT, the CT would read 100 amps.

I've seen this on a fairly large number of factory assembled switchboards. Some were not easy to correct.
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Old 02-09-2015, 06:35 AM   #22
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So what if there's no noodle , say an open delta....

we have a positive peak @ 120 for two phases vs. three ....

theoretically, every 120 out of 1/60th a sec there's no negative to balance it all

so where does that emf go? ~CS~
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