1. Function
This mine explosion-proof dual power vacuum electromagnetic starter is applicable in AC
50hz distribution system with voltage of 1140V , 660V, 380V in underground coal mines with
explosive and dangerous gas(methane)and coal dust, it is used to offer automatic switching
to dual power supply dual fan and realize master-slave switching over operation mode of
dual power supply and dual fan, ensuring uninterrupted ventilation in coal mine for long
time, it is the most ideal control equipment dual fan in coal mines especially for mines with
heavy gas.

2. Model

3. Characteristics
3.1 With protective functions for short circuit, loss of phase, leakage lockout, over voltage,
over current etc.
3.2 With lockout protectiv function for fan and power supply
3.3 Two-loop(The fan is general axial-flow fan, and the switch is selective according to
user's requirement)
3.4 Two-loop switching over time is adjustable