Patent ID: 8763476

Claim:
A transformer comprising: a clamped winding assembly including: first and second end blocks disposed in spaced, opposing relationship; at least one winding disposed between said first and second end blocks; a plurality of insulating members disposed between said first and second end blocks; a clamping assembly for urging said first and second end blocks toward one another so that said end blocks apply a compressive force to said at least one winding and said plurality of insulating members; and a load sensing member including a fiber optic sensor, said load sensing member disposed adjacent, but not in direct contact with, one of (i) said at least one winding and (ii) said at least one of said plurality of insulating members so as to be subjected to said compressive force, wherein said load sensing member provides an output signal containing information regarding the magnitude of said compressive force when the transformer is energized and under a load.