OZS Flame-proof Contactor Unit is design to control, supply and secure the electric engine of the hydromechanical water gallery purification system. Unit is destined to work in ‘a’, ‘b’ and ‘c’ methane explosion hazard mine galleries and in class A and B coal dust explosion hazard mine galleries.
Unit is adopted to work with 500V power supply from IT grid. Outflows safety system guarantee protection of three-phase engines from the effects of short circuits, overloads or in case of activation of individual thermal protection (bimetals integrated in engines). Additionally every outflow, system is in advance controlling the resistance of the main circuit insulation to protect it from powering up the damaged section of the power grid.