The division of primary distribution box and secondary distribution box is an important concept in the power system, which involves the safe and stable operation of the power system.
First of all, the primary distribution box is a distribution box that is directly supplied by the high-voltage transmission lines in the power system. They are usually located at the beginning of the power system and are responsible for distributing the electrical energy in the high-voltage transmission lines to the various secondary distribution boxes. The voltage of the primary distribution box is usually 35 kV or 10 kV, and its rated current and power rating are also relatively large. The primary distribution box is an important part of the power system and plays a vital role in ensuring the safe and stable operation of the power system.
Compared with the primary distribution box, the secondary distribution box is a distribution box that supplies power with electric energy distributed from the primary distribution box. They are usually located in the middle of the power system and are responsible for distributing electrical energy to the individual consumers. The voltage of the secondary distribution box is usually 380 volts or 220 volts, and its rated current and power rating are also relatively small. The secondary distribution box is one of the most common power distribution equipment in the power system, which is widely used in factories, commercial centers, residential areas and other fields.
In practical application, the role of the primary distribution box and the secondary distribution box is coordinated with each other. The primary distribution box is responsible for distributing the electrical energy from the high-voltage transmission line to the various secondary distribution boxes, while the secondary distribution box is responsible for distributing the electrical energy to the individual electrical equipment. This hierarchical power supply method can effectively ensure the safe and stable operation of the power system, and is also convenient for management and maintenance.
In addition, there are certain differences in the design and structure of the primary distribution box and the secondary distribution box. The primary distribution box is usually welded with steel plate or angle steel, which has good mechanical strength and shockproof performance, and can withstand large currents and voltages. The secondary distribution box is usually welded by forming aluminum frame or angle steel, which has good heat dissipation performance and protection performance, which can ensure the normal operation of the electrical equipment in the box.
In short, the primary distribution box and the secondary distribution box are important parts of the power system, and the division between them involves the safe and stable operation of the power system. In practical applications, we need to select appropriate power distribution equipment according to the specific situation, and strengthen management and maintenance to ensure the normal operation of the power system.
In order to better meet the needs of practical applications, a series of relevant standards and specifications need to be followed in the design and manufacturing process of primary and secondary distribution boxes. For example, in the selection of materials, it is necessary to choose high-quality materials, such as steel plates, aluminum, etc., to ensure the mechanical strength and service life of the equipmentIn the manufacturing process, advanced welding, processing and other technologies need to be used to ensure the accuracy and stability of the equipmentIn terms of electrical performance, it is necessary to meet the requirements of relevant standards and specifications, such as the measurement and protection of voltage, current, power and other parametersIn terms of safety performance, a series of measures need to be taken, such as overload protection, short circuit protection, leakage protection, etc., to ensure the safety of equipment and personnel.