Adjusting trip settings on energized breakers
Adjusting trip settings on energized breakers
(OP)
Recently we had a study done and adjustments were recommended for both arc flash reduction and coordination in the report.
Can adjustments be made to breaker trip settings while energized? Our electrician says yes, he has down it on instantaneous but I am unsure on the other settings recommended like short time delay, etc.
Can adjustments be made to breaker trip settings while energized? Our electrician says yes, he has down it on instantaneous but I am unsure on the other settings recommended like short time delay, etc.






RE: Adjusting trip settings on energized breakers
I would not do it myself.
RE: Adjusting trip settings on energized breakers
If it's a separate microprocessor relay, you can probably do it, but there is always some risk of a nuisance trip. I've done a lot of these settings changes will energized - only had a couple of trips.
RE: Adjusting trip settings on energized breakers
"Will work for (the memory of) salami"
RE: Adjusting trip settings on energized breakers
However, I do cheat and read the IOM first. And, yes, if the manual was not clear, I would call the mfg - although I never have. If the manual is not clear, I highly suspect the mfg rep will be fuzzy as well.
Second, I wouldn't do it on a critical circuit (as defined by the owner - where an unanticipated trip causes hate and discontent).
Third, if it is hotel load, I tend to warn every one in the area of a possible power outage. No use having anyone dangling in the dark.
Why so cautious?
2. I am neither above or below fat-fingering the buttons.
ice
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