Control transformers are installed in one- or two-phase machines and devices of any kind. They are available either as a vacuum impregnated or an encapsulated design. They may be installed in housings with various types of protection. Most of the materials used are UL – /CSA approved. Individual requirements, e.g. thermal circuit breakers or current limiters can be supplied as a matter of course. Control transformers can be designed with a power rating of up to 100 kVA.