Indoor dry combined mutual inductor

The utility model discloses an indoor dry combined mutual inductor that is suitable for the variable-ratio form and is provided with the protective functions of excessive pressure and overloading. The utility model is a totally-enclosed structure. A voltage machine, an electricity machine and a junction box of a secondary leading-out terminal are sealed with insulation and are fixed to a base plate with a hanging ring device. The primary leading-out terminal and the secondary leading-out terminal are formed into an external coupling part. The three phases A, B and C of the primary leading-out terminal are all suitable for a cable socket which is used with a cable plug with an identical current capacity for matching. The utility model is provided with convenient connection and safe utilization. The phenomenon of electric larceny that is caused by the shorting current of the primary leading-out terminal is avoided. The utility model greatly improves the dependability of power supply.