Hi All,
I am completing an AFHA of a site that has numerous 3MVA, 35/0.48 kV transformers. These transformers have split secondary bushings on either side. There are also two cabinet doors for a single set of bushings. Between the doors there is a small, permanent section of the enclosure that effectively acts as a barrier at the end of the horizontal electrodes. See attached drawing snip and photo.
What are your thoughts on electrode configuration per IEEE-1584-2018? HCB seems most appropriate. However, I am thinking the barrier would block a substation portion of the AF event and any personnel in front of either access panel would experience some reduced amount of IE due to their proximity and position for access. In other words, the blast would not be directed at them.
I'd appreciate any feedback.
-Andrew
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XF Electrode Config Q.pdf [232.03 KiB]
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