1. Function
This mining explosion-proof type vacuum feeder switch is mainly used as low-voltage feeder
switch for mobile substation(After the cover board is opened, it is oppositely connected with
dry transformer) or 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 630A or 500A
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 Blue screen real-time English display for parameters like voltage, current, insulating
value and switching-on times etc
3.2 Standard RS485/232 communication interface
3.3 Multiple Protective functions for overload, short circuit, loss of phase, electric leakage,
leakage lockout, over voltage, under voltage etc.
3.4 Function of fan and power supply lockout, gas lockout, high-voltage electric interlock