NFPA 79 Testing and Verification

[PSM007]

Hello,

I have been looking for a training course is regards to Hi-pot and IR testing for industrial machinery. I have done an extensive search on the University of Google and found nothing to this regard.
Specifically, I am wondering what can be bypassed and what should be left in a circuit. For instance, we bypass transformers, fuses, relays and motors when testing. Anything that has been already
tested by the manufacturer is bypassed. Maybe I answered my own question, but I would like to know what others have to say.

 

[petersonra]

Hello,

I have been looking for a training course is regards to Hi-pot and IR testing for industrial machinery. I have done an extensive search on the University of Google and found nothing to this regard.
Specifically, I am wondering what can be bypassed and what should be left in a circuit. For instance, we bypass transformers, fuses, relays and motors when testing. Anything that has been already
tested by the manufacturer is bypassed. Maybe I answered my own question, but I would like to know what others have to say.

hi-pot and IR testing is not common with industrial machinery. maybe that is why you could not find anything on google.

In any case, it is no different than performing the same test on something else like a switchboard.

we bypass transformers, fuses, relays and motors when testing. Anything that has been already tested by the manufacturer is bypassed.

what else would be left worth testing?

 

[PSM007]

NFPA Testing And Verification

NFPA Testing And Verification

Hi Bob,

Thanks for your response. NFPA:2012 and IEC 204-1 standards both require Hi-Pot and IR testing when commissioning new machines. Since the Hi-Pot test is destructive, we always bypass electrical components that have already been tested by the manufacturer. I was just curious if others do the same. In regards to the internet, I am really surprised by the lack of information the NFPA provides to this standard when it is a requirement.

Regards,

Phil

 

[petersonra]

Hi Bob,

Thanks for your response. NFPA:2012 and IEC 204-1 standards both require Hi-Pot and IR testing when commissioning new machines. Since the Hi-Pot test is destructive, we always bypass electrical components that have already been tested by the manufacturer. I was just curious if others do the same. In regards to the internet, I am really surprised by the lack of information the NFPA provides to this standard when it is a requirement.

Regards,

Phil

I took a look. Never noticed this requirement before. Never seen it done except for people claiming they are "CE".

We do this testing on request for some of our customers who are claiming they are "CE".

We don't disconnect anything other than vfd input wiring.