Power distribution cabinet?

We live at a time when many people know that in order for a smartphone to work, it must be periodically connected to a charger included in the outlet. It is enough to open the refrigerator door, by the way also connected to the outlet, and quench your thirst with a sip of a cool drink. Well, about the lighting in our apartments, on the street and in the shops, so no need to say. Enough to turn off the lighting for 5 minutes. And everyone starts to remember where this box with fuses is. Although it is correctly called the "power distribution cabinet".

There are several types of switchboards. But their main tasks are as follows:

- input-distribution, i.e. Receiving and distribution of electricity between consumers,

- control, i.e. Constant monitoring of voltage and current consumption.

- safety, protection against overloads and short circuits

The main ones are: the main distribution board (MDC), the input-distributing device (ASU) and the switchboard (SC). They are located in transformer substations, industrial plants and other facilities with a large consumption of electricity.

The following follow:

- Power distribution cabinets (SHRS). Usually included after the ASP and calculated for the current consumption, up to 400 A. They are a cabinet with a central switch and fuses that protect the outgoing lines from overloads and short circuits.

- power distribution cabinets (SHRE). They have in their composition, RCDs (protective shutdown devices), serving to protect against leakage currents to the ground. They help protect people from electric shock and prevent fires. Typically, such cabinets are installed on production sites, in stores and warehouses. They carry the main technological load. Since they are connected to lighting, various equipment and utility rooms. In this case, it is in them that, if possible, the distribution of loads is carried out in phases (if 3 phase power supply is implemented).

- Power Distribution and Accounting Cabinets (SSDs). Designed for installation in small rooms, with a current consumption of up to 100 A. Such facilities are - private buildings, small offices, shops and stalls. When planning the power supply of such premises, special attention should be given to good grounding. As otherwise, this will affect the improper operation of the RCD and, as a consequence, may lead to accidents.

- control and automation cabinets (ШУ and ША). Usually they contain fire and security alarm equipment, as well as process control equipment.