KBZ Explosion Proof Vaccum Feed Switch for Coal Mi

Purpose explosion-proofvacuum feed switch formine is suitable to the mine well withmixed gascontaining methane. In the power supply system of 50 Hz AC, rated voltage of 1140 V and below and the triphase neutralnot grounding,the product can be used as distribution main switch alone ,distribution branch switch and also the control of motor not startfrequently. The switch connects with KJ254 mine system of power automatic control and synthesis monitoring to achieve remote automatic control and monitorinf of equipment ,at last ,to achieve noboby is on gard of monitoring. Technical features 1) With the display of closing,opening,fault and insulation resistance of kilohmmeter; 2) Times of overload and short circuit can be adjustable by DIP plug; 3) with the protective functions of short-circuit, overloading, current leakage interlock, triphase symmetry current leakage,selective current leakage,branch switch current leakage. 4) With the function of wind power methane interlock. Technical Data Rated power(V) 1140,660 Rated current(A) 400,200 Work frequency(Hz) 50 Over load times 0.3-1.0 Short circuit times 1.0-10 Closing mode Mechanical closing and mechanicalhold