Profile: Peterson Power Systems is a Caterpillar® dealer of diesel & gas electric power generation sets, temperature control, uninterruptible power supplies and air compressors. Automatic transfer switches are an integral component in Caterpillar® generator sets and are responsible for transferring power between utility and generator. It features open & closed transition, delayed transition, bypass isolation, 40 through 4000A and 50/60 Hz 600 V class.