In the normal construction process, temporary power will be needed, so the power equipment for the temporary substation will be built, and then Power Distribution Box Branch to each power consumption site. So distribution box can be divided into three types: primary distribution box, secondary distribution box and tertiary distribution box;
The primary distribution box is from transformer Lead in three-phase Power Supply , ground wire, neutral wire. It is applicable to the construction power of construction site. It is specially designed for door It is designed for the special situation of the project construction site, and conforms to the relevant construction power specifications and standards of the construction department. The whole set of products can form a complete three-level protection system for construction power to achieve the purpose of one machine, one switch and one protection, which is very suitable for all kinds of up to standard projects. The primary cabinet adopts the lower incoming and outgoing lines, and the front door is opened. The main bus is connected by copper bars, with good contact. The inside is equipped with a metering system. It is safe and beautiful, and the roof of the rainproof box is suitable for field work.
The secondary distribution box is called secondary distribution box or cabinet, which is connected from the primary distribution box or cabinet to the secondary distribution box or cabinet. At this time, if the secondary incoming line branches to a distribution box or cabinet, it is also called the secondary distribution box or cabinet. The secondary distribution box also uses the construction site, which is specially designed for the special situation of the project construction site, and conforms to the relevant construction power specifications and standards of the construction department. The secondary box adopts the design of internal and external doors, with plastic sprayed appearance. It is safe and beautiful, and the roof of the rainproof box is suitable for field work.
The three-level distribution box is the control cabinet of the electrical equipment itself. The distribution box is set under the general distribution box, and the distribution box is set under switch Box and switch box are equipped with electrical equipment to form three-level distribution. The "two-level protection" mainly refers to the adoption of leakage protection measures. In addition to installing leakage protectors in the final switch box, a two-level leakage protector should also be installed in the upper level distribution box or general distribution box to form two-level protection in general.
The principle of "one machine, one switch, one leakage, one box and one lock" means that it is strictly prohibited to directly control two or more electric equipment (including sockets) with the same switch.
