Hello, colleagues-
I'm looking at hipot testing a physically large electric machine and trying to
determine the best approach to complete the task. NFPA 79 & C22.2 No. 301 say
hipot is required, IEC 60204-1 leaves it to the manufacturer's consideration.
The machine supports outdoor construction work, contains several 3-phase 480V
motors and is powered by on-board genset, all mounted on semi truck trailer.
Process control is done through simple pushbutton switchgear panels. There are
no programmed electronics or PCBs.
This is by far the largest product I've considered for hipot. Isolation of the
product isn't feasible (won't fit on test table :) and disassembly is strictly
limited. I'm looking for practical guidance from those that routinely test and
inspect physically large equipment. IR and ground bond testing are already
planned. Risk assessment thus far tells me hipot may not be essential,
however, the standards say...
How should I address this elephant?
Thanks in advance & best regards,
Chet Summers
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