All mining harvesters on power equipment are divided into working with own power installation and using powered energy. The first include machines equipped with thermal power plants, mainly internal combustion engines, the second - machines with electric or hydraulic drives. In exceptional cases, we have to deal with machines that can operate both from their own power installation, and from the energy supplied [43]. So, for instance the KSM 2000R combine is powered from two energy sources. Its rotary working body with a power of 1100 kW is driven by an electro-hydraulic power unit connected to an external network by a six kilovolt cable. The own diesel engine with a power of 1000 kW ensures the operation of the remaining drives of the machine [44].