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 Real-time English setting, easy parameter setting
3.2 With built-in working power supply , allowing parameter setting without power
3.3 Multiple protective functions for overload, short circuit, loss of phase, leakage lockout,
selective leakage(branch switch), over-voltage, under-voltage etc.
3.4 Function of fan and power supply lockout, gas lockout and manual closing lockout in
fault state