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tap changing under load encore



I did not mean to imply that this type of transformer is found on pole tops.
 Mostly, they are on substations built on the ground.  Sometimes mini
substations are constructed on platforms between two poles.  I believe I have
a recollection of one such platform with  three single phase transformers
with tap-changing under load on a 69kv/12.5kv system.  Wallace Edward Brand