mining explosion-proof (reversible) vacuum electro

mining explosion-proof (reversible) vacuum electromagnetic starter I. use the starter is used underground coal mines or other mining industries which are full of explosive mixture gas (such as methane)in medium surrounded. it can directly or remotely control three-phase mouse-cage asynchromous motor to start and stop. II. function features the starter has protective functions of voltage-absent, over-load, short-circuit, phase-off, leakage locking etc. it can automatically cut off the power supply when it has failures. III. technical parameters 1. explosion-proof , mine explosion-proof mark 2. main technical parameters of the starter Model QBZ-80.120N Rated voltage (V) 380/660/1140 Rated current (A) 80.120 Sub-capacity limit (A) 3000 Dimensions (mm) 610x820x500 Weight (kgs) 130 Service life of power The main contactor’s electrical life span AC-4 type not less than 3x104 Service life of machine 300,000 times Working time Long-term Protection function JDB: adopting JDB integrated protection