Control Transformers are used to reduce supply voltage to 230v or lower, depending upon requirement, for the operation of electromagnetic devices e.g.: Contactors, Solenoids, Relays & Timers. they are specially designed to accommodate the momentary in rush current caused when components are energized without allowing secondary voltage to fall below specified limits. Generally the ratings of Transformers is upto 5 KVA, 1Ph as well as 3Ph.
Control transformer