WAUKESHA ELECTRIC SYSTEMS is the largest U.S manufacturer of power transformers and a valued supplier of large-power transformers transformer accessories including a line of Transformer Health Products®, LTC and breaker ......WAUKESHA ELECTRIC SYSTEMS is the largest U.S manufacturer of power transformers and a valued supplier of large-power transformers transformer accessories including a line of Transformer Health Products®, LTC and breaker components high voltage substation, switchyard and transmission line EPC and complete transformer service solutions for the transmission and distribution of electric power.