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 Post subject: S&C PHM padmount switches
PostPosted: Fri May 28, 2021 7:46 am 

Joined: Thu Apr 18, 2019 11:42 am
Posts: 49
Folks,

Since PMHs have inter-phase barriers, chances of 3 phase bolted faults are pretty low (15kV rated system). What is your SOP for AF studies in this situation? I currently only have access to SKM (no ArcPro). Do you use the 3 phase calc's or calc using single phase values?

Thanks for the feedback,

Mike


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 Post subject: Re: S&C PHM padmount switches
PostPosted: Mon May 31, 2021 8:50 am 
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Joined: Wed May 07, 2008 5:00 pm
Posts: 843
Location: Rutland, VT
I think you will find that the incident energy levels will be low based on phase separation distances and fault currents. One thing to consider is that since this is utility equipment and voltages, you should consult OSHA 1910.269 Appendix E for doing an arc flash assessment.

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