Headquartered in Warrendale, Penn., Mitsubishi Electric Power Products, Inc. is a US affiliate of Mitsubishi Electric Corporation of Japan, and serves the North American power systems, rail transportation and water treatment industries with electrical and electronic products, systems and services. Products include gas circuit breakers, vacuum circuit breakers, power transformers, gas insulated sub-stations, power electronics and electricity transmission technologies, generator services, ozone water treatment systems, uninterruptible power supplies and rail transportation equipment.