We performed some acceptance testing earlier this year with some Eaton Power Defense breakers with their new PXR trip units. Testing went great and all the equipment looked good.
The building is fed from two separate utility sources with a tie available and the client is experiencing nuisance trips across three separate breakers on the "B" feed.
The building is lightly loaded as it's still under construction, and the numbers recorded in the trip unit are absolutely insane, such as 78,000A Neutral instantaneous trip and 3500V readings. The current recorded by the trip unit shows a -35,000A "fault". Even the temperature is out of line, but everything reads correctly when we performed the primary injection testing.
Has anyone experienced these trip units potentially failing so quickly?
We've reached out to Eaton and are waiting a response.
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