Suitable for dangerous environment of methane and coal dust explosion and three-phase neutral point ungrounded power supply system of frequency 50Hz, rated voltage 1140V, 660V, transform power supply of 1140V,660V to 380V,work as power supply for life-saving systems such as lifebuoys or refuge chambers. The power supply can be cut off automatically when overload, short circuit,phase break, leakage and so on occurs in the power supply circuit, so as to protect the load and related circuits.Automatic control of power supply equipment can be realized by using monitoring system in mine.

Square shell, quick opening structure and modular core. Convenient maintenance and use.

Use AC vacuum contactor as the main breaking element, which has the advantages of strong breaking ability, safe and reliable, and can switch on and off the working current frequently.

Adopt microcomputer integrated protection device based on single chip microcomputer technology, full Chinese LCD display and menu type operation, can amend fixed protection value without power failure and various kinds of operations.

It can display system voltage, current and other parameters in real time, as well as display equipment fault type, fault parameters, fault time,and has the function of fault memory and query.

With overload, short circuit, leakage, leakage latch, overvoltage, undervoltage, overvoltage absorption and other protection functions.

With function of phase-sensitive and short-circuit protection at the end to ensure reliable protection when short-circuit occurs at the far end of the cable.

Equipped with standard RS485 communication interface, it is configured in mine monitoring system to realize 4 remote functions, namely telemetry, remote control, remote communication, remote adjustment. Can realize the functions of remote dividing, closing, remote reading of meter, thus to achieve unattended operation in the substation.