For the separation of conductive and non-conductive non-magnetic materials are used electrodynamic separators with permanent magnets and electromagnets. One of the ways of intensification of the process of separation is to increase the magnetic field strength in the separation zone. When separation of fine fractions, the problem arises of reducing the pole pitch of the magnetic system, which reduces the influence of magnetic field on shared materials. In this regard, there is a need to conduct research on the development of highly efficient magnetic systems.

Keywords: electrodynamic separation, magnetic system, permanent magnet, pole step, the electromagnet

The basic problem of fires at various locations due to power surges, electrical network, modern technical ways to protect electrical equipment from power surges, electrical outlet and are encouraged to develop a device that allows fundamentally solve the problem.

Keywords: Power surges, electrical network, fire, device.