Switchgear type SZR-2B

Switchgear type SZR-2B is an electrical device designed for use in methane-free without coal dust explosion hazard underground mining pits as well as on the ground. Switchgear type SZR-2B is designed for connecting and switching-on receivers to mine 3-phase grid with insulated star point on the transformer (IT system) for the rated grid supply voltage of 230V in automatic power backup switching-on after a power failure of basic supply (automatic reserve switching). The receivers are connected to the switchgear using a terminal clamps through the cable gland. Switchgear SZR-2B is equipped with power protection against short-circuits and reduction of earth resistance.