Apparatus and instruments for regulating electricity namely apparatus for converting single phase power into three phase power or polyphase power and apparatus for converting two phase power into three phase power or polyphase power; Apparatus for electricity supply; Apparatus for the control of power supply to electrically driven motors; Electric transformers; Electrical apparatus (other than generators) for use in energy supply; Electrical converters; Electrical power supply apparatus (other than generators); Electrical supply apparatus (other than generators); Electrical transformers; Electricity transformers; Inverters (electricity); Transformers (electricity)