In modern electrical systems, distribution equipment plays a crucial role, they are responsible for the distribution, control and protection of electric energy, to ensure the safe and stable operation of electrical equipment.

In this paper, the distribution box, distribution cabinet, switch cabinet, control box these four common distribution equipment are analyzed in detail, from the function, installation environment, internal structure, controlled objects, dimensions and other aspects of their similarities and differences and application scenarios, take a look.

Distribution box

Distribution box, as the name suggests, is a box that distributes electrical energy. It is mainly used for the control and distribution of electrical equipment, and has the protection function of overload, short circuit and leakage of the line.

Distribution box figure all over a variety of places, such as schools, organs, hospitals, factories, workshops, families, etc., according to different uses, can be divided into lighting distribution box, power distribution box and so on. For example, in the home, the lighting distribution box is responsible for distributing electrical energy to the lighting equipment in each room, and the power distribution box provides power for high-power appliances such as sockets and air conditioners. Due to its relatively small size, the distribution box can be flexibly installed, which can be hidden in the wall, save space, and can stand on the ground for easy maintenance and maintenance.

Distribution cabinet

The power distribution cabinet is a low-voltage power distribution device composed of switchgear, measuring instruments, protective appliances and auxiliary equipment assembled in closed or semi-closed metal cabinets or screenscreens according to electrical wiring requirements.

In normal operation, it can be manually or automatically switched on or off the circuit to achieve the control and protection of electrical equipment.

There are many categories of distribution cabinets, which can be divided into incoming cabinet, metering cabinet, outlet cabinet, and so on. When the equipment fails or runs abnormally, the power distribution cabinet can cut off the circuit or send an alarm with the help of protective appliances to ensure the safety of the electrical system.

In addition, with the help of measuring instruments, various parameters in operation can be displayed in real time, such as voltage, current, power, etc., and some electrical parameters can be adjusted to prompt or signal deviation from the normal working state. The distribution cabinet is often used in the power generation, distribution and substation, and is the core equipment of the low-voltage distribution system.

Switch cabinet

Switchgear is a complete set of switchgear and control equipment, as a power center and main distribution device, mainly used for power lines, the main electrical equipment control, monitoring, measurement and protection.

It is usually set in the substation, distribution room, etc., responsible for the distribution and control of high voltage or medium voltage power system.

The internal structure of the switch cabinet is complex, including circuit breakers, isolating switches, transformers, relay protection devices and other key components, which can achieve accurate control and comprehensive protection of the power system. For example, in a substation, the switchgear can control and monitor important equipment such as main transformers and transmission lines to ensure the stable operation of the power system.

Control box

The control box is a power distribution equipment specially designed for power, lighting distribution and motor control inside and outside all kinds of buildings, suitable for indoor wall hanging and outdoor floor installation.

It is mainly used for fire pump control, submersible pump control, fire fan control, fan control, lighting distribution control and other specific application scenarios.

The control box has a variety of control methods, including direct start control, star triangle buck start control, autoroot buck start control, frequency converter start control, soft start control, etc., and can also use isolation switch and fuse switch as isolation breakpoint. For example, in the fire fighting system, the control box can realize the automatic start and stop control of the fire pump to ensure that the pump can start in time when the fire occurs and provide sufficient water for the fire.

Distribution box, distribution cabinet, switch cabinet, control box these four kinds of distribution equipment in the function, installation environment, internal structure, controlled objects, etc., each has its own emphasis.

The distribution box is small in size and flexible in installation, which is suitable for power distribution and control in various places. Distribution cabinet is the core of low-voltage distribution system, with comprehensive functions, which is often used in power generation, distribution and substation. As the "commander" of the power system, the switchgear is responsible for the distribution and control of electric energy in the high-voltage or medium-voltage power system. The control box provides specific control and protection for specific equipment.