This paper describes the main types of conductive electromagnetic interference that occur in modern high-frequency transistor converters and shows methods for these interferences’ mitigation. A network interference-suppression device which makes it impossible penetration of conductive electromagnetic interference (EMI) from a consumer to a mains and back is introduced. The device also provides the complete galvanic decoupling between the power mains and the consumer. This is achieved through the introduction of an intermediate link between the consumer and the network, the link being powered by a rechargeable battery, and time separation of electrical energy between consumption and transmission cycles due to the special algorithm of charging and discharging the batteries of the consumer. It provides mutual protection of the consumer and the network from all types of conductive EMI, as well as protection of the consumer from possible electric shock.