The explosion-proof power distribution cabinet is mainly composed of air switch, dual-power automatic transfer switch, overvoltage protection switch, leakage protection switch, ammeter, voltmeter and box shell. Generally speaking, the explosion-proof power distribution cabinet is mainly divided into two parts. The first part is the box shell, which is usually made of aluminium alloy or stainless steel. The second part is electrical related components and related accessories, and components of different sizes are installed according to different needs.

1. Air switch: The air switch is a circuit breaker, which is used to open, disconnect and carry rated operating current and short circuit, overload fault current in the circuit, and can be overloaded and loaded on the line, short circuit voltage, undervoltage, etc. The circuit is reliably protected. The circuit is reliably protected. There are various designs of dynamic and static contacts and levers of circuit breakers, but the main purpose is to improve the breaking capacity of circuit breakers. At present, the current limiting principle, which uses a certain contact structure to limit the peak value of the short-circuit current when the circuit is broken, has a significant impact on improving the breaking capacity of the circuit breaker and has been widely used.

2. Dual-power automatic transfer switch: Dual-power automatic transfer switch, used in the dual-selection automatic switching system of power sources. After the first line failure, the dual-power automatic transfer switch automatically switches to the second mode to supply power to the load. The second mode, and then the dual power automatic transfer switch automatically switches to the first mode to supply power to the load.

3. Leakage protection switch: The leakage protection function means that people touch the charged body to trip to ensure personal safety. It is the main function of the leakage protection switch; if the electrical equipment is not well insulated and leaks to the case, the leakage protection switch will trip, preventing the human body from touching the electric shock.

4. Surge protector: Surge protector is an electronic device that provides safety protection for various electronic equipment, instruments and communication lines. When a sudden current or voltage occurs in a circuit or communication line due to external disturbance, the surge protector can conduct the shunt in a very short time, thereby preventing other equipment in the circuit from being damaged by the surge. 5. Energy meter: The working principle of the energy meter: When the energy meter is connected to the circuit, the magnetic flux generated by the voltage coil and the current coil pass through the disc, and these magnetic fluxes are different in time and space on the disc. Due to the interaction between the magnetic flux and the eddy currents, the induced eddy currents generate a rotational torque to rotate the disc. The braking effect of the magnetic steel causes the disc to rotate at a uniform speed. As the magnetic flux is proportional to the voltage and current in the circuit, the disc moves at a speed proportional to the load current, and the rotation of the disc is transmitted to the meter via the worm. The meter is the actual electrical energy consumed in the circuit.

6. Ammeter: The ammeter is composed of the magnetic field force in the magnetic field corresponding to the current-carrying conductor. When the current passes, the current passes through the magnetic field along the axis of the spring, and the current cuts the magnetic induction line. Thus, the magnetic field force is used to deflect the coil and to deflect the pointer of the rotation axis.

7. Voltmeter: A voltmeter is an instrument used to measure voltage. Ordinary voltmeter - voltmeter: A sensitive ammeter has a permanent magnet inside and a wire in series between the two terminals of the ammeter. The coil is placed in the magnetic field of a permanent magnet and is connected to the hands of the watch by a transmission. The voltmeter is a fairly large resistor, ideally considered as an open circuit. A voltmeter is made up of an ammeter. The internal resistance of the ammeter is very small. This is followed by a large resistor in series which can be connected directly to the two points where the voltage is to be measured. According to Ohm's law, the current displayed by the ammeter is proportional. An external voltage can be used to measure the voltage.