1. Function
This mine explosion-proof type vacuum feeder switch is mainly used as main switch or
branch switch in AC 50Hz power distribution system of indirect neutral-point earthing with
voltage of 1140V or 660V and current of 400A or 200A in underground coal mines with
explosive and dangerous gas(methane) and coal dust and it is also used for non-frequent
start of big capacity motor .

2. Model


3. Characteristics
3.1 Cute square shell, convenient and flexible for movement
3.2 Multiple protective functions for overload, short circuit, loss of phase, electric leakage ,
leakage lockout, selective leakage(branch switch), over voltage , under voltage etc.
3.3 The operating mechanism adopts manual switching on or off , and it adopts electromagetic
tripping in fault state.