Lighting&signal transformer

Suitable for dangerous environment of methane and coal dust explosion and power supply system with frequency 50Hz, rated voltage 1140V, 660V, 380V ungrounded three-phase neutral point,transform of power supply of 1140V, 660V,380V to 127V, work as an integrated explosion-proof electrical equipment for lighting, power for signal load, power control, and protective device of leakage, short circuit,etc.It can replace the existing 2.5kVA, 4kVA dry type transformer and manual explosion-proof switch multi-body control mode.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.