Switchgears type ZZ-3/S3, ZZ-3/S2

Switchgears type ZZ-3/S3, ZZ-3/S2, ZZ-3/S3/P, ZZ-3/S2/P is a device for use in underground mining in excavations with no explosion hazard or in conditions with no methane explosion hazard and designated as class A coal dust explosion hazard or on the ground. Switchgears type ZZ-3/S3, ZZ-3/S2, ZZ-3/S3/P, ZZ-3/S2/P is intended for connecting and switching receivers In the mine 3-phase power grid with an insulated transformer star point or earthed through a resistor for rated voltages 3,3kV, 6kV, 10kV, 12kV. The set is equipped with electric energy protection against short-circuiting, overloads, lowering of insulation resistance and overvoltage.