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110KV BIL?

Original poster: "Ray Haynes by way of Terry Fritz <twftesla-at-uswest-dot-net>" <ray.haynes-at-home-dot-com>

On a potential transformer what does the BIL rating mean? My only guess it's
the breakdown voltage from the high voltage winding to either the case or
low voltage winding. Is that correct?

If that is true then if I had 2 potential transformers (120 to 14.4KV) each
with 110KV BIL then I could connect the HV sides in series (for 28.8KV) and
not worry about breakdown from either high voltage winding to anywhere (case
or low voltage winding) caused by the transformers themselves (excluding any
tesla related arcs)?