Introduction

This device is specially designed for use in explosive environments underground in coal mines (hazardous environments with methane and coal dust), with an explosion-proof mark of Exd[ib]I Mb. Its core features include dual power supplies, dual circuits, automatic switching, and a 127V output. It is specifically designed to provide uninterrupted, safe, and reliable 127V power for underground lighting, signaling, and monitoring equipment. It is an intelligent explosion-proof device that integrates voltage transformation, control, protection, and communication.

Power Supply

1. Rated supply voltage: 2-circuit three-phase AC1140V/AC660V
2. Input apparent power: ≤18kVA

Output Power Supply

1. Three-phase output voltage
a) Number of interfaces: 2 channels
b) Output voltage: AC127V
c) Output current: ≤36A

2. Intrinsically safe output
e) Number of interfaces: 1 channel
f) Output voltage range: DC (22.8~24.5) V
g) Rated operating current: 300mA
h) Overcurrent protection: ≤500mA

3. The switching time between the main and backup power supplies is ≤500ms

Main Functions

a) It features automatic dual-power switching functionality.
b) It has an intrinsic safe DC24V output function.
c) It has the function of two-way three-phase AC127V output.
d) Equipped with dual-circuit independent power supply (for lighting and signaling respectively).
e) It has protection functions such as overvoltage protection, undervoltage protection, gas lockout, wind power lockout, leakage protection, and overload protection.
f) It features a main and backup power supply interlock function, ensuring that only one power supply is connected at any given time.