Distribution box is the data on the massive parameters, generally constitute a low-pressure forest according to electrical wiring, requiring switching equipment, measuring instruments, protective appliances and auxiliary equipment assembled in a closed or semi-enclosed metal cabinet or screen, constitute a low-voltage distribution box. Normal operation can be switched on or off by means of manual or automatic switching.
The distribution box has the characteristics of small volume, simple installation, special technical performance, fixed position, unique configuration, no restrictions on the site, more common application, stable operation and reliable, high space utilization, small footprint and environmental protection.
The distribution box has the characteristics of small volume, simple installation, special technical performance, fixed position, unique configuration, no restrictions on the site, more common application, stable operation and reliable, high space utilization, small footprint and environmental protection. Is the command of the power supply lines in a variety of components reasonable allocation of power control center, is a reliable acceptance of the upper power supply, the correct feedback from the load power control links, but also access to the quality of the user's power supply or not the key. Improve the reliability of power distribution box operation, is a high-quality engineering objectives.
The use of distribution box: a reasonable allocation of electricity to facilitate the opening and closing of the circuit operation. Has a high degree of security protection, can be intuitive display circuit conduction state.
Distribution box is the electrical wiring requirements of the switch equipment, measuring instruments, protective appliances and auxiliary equipment assembled in a closed or semi-enclosed metal cabinet or screen, constitute a low-voltage distribution box. Normal operation can be switched on or off by means of manual or automatic switching. Malfunction or abnormal operation with the protection of electrical cut off the circuit or alarm. By measuring the instrument can display the various parameters in operation, but also for some electrical parameters to adjust the deviation from the normal working state to prompt or send a signal.
In the domestic power supply and distribution system, there are many types of distribution cabinets, their cabinet structure, technical parameters are different. Under the influence of the following factors, the design of the drawings often need to be modified, or even redesigned, which will not only affect the power supply and distribution system for the construction plan, but also to the distribution cabinet manufacturers on time and quality to complete the production of power distribution cabinet has a certain Troubled.
Factors that affect the design of the drawings have the following points:
1. Power distribution cabinet manufacturers to recommend their own production may not be suitable for the user's products.
2. Design Institute of some of the new cabinet is not very understanding only according to user requirements for design.
3. Users of their own needs are not very understanding, select the cabinet can not be selected according to their own needs.
To solve the above problems, to meet the needs of users more accurate choice of power distribution cabinet specific models, the following for the domestic power supply and distribution system commonly used in the characteristics of low-voltage distribution cabinet analysis. In the case of
(1) Construction of electricity distribution system should be set up the total distribution box, distribution box, switch box, and in accordance with the "total - minutes - open" order for the classification, and the formation of "three power distribution" mode.
(2) Construction of the distribution system with the distribution box, switch box installation location should be reasonable. The total distribution box should be as close as possible to the transformer or external power supply, so that the introduction of power. The distribution box should be installed as far as possible in the center of the electrical equipment or the relative concentration of the load to ensure that the three-phase load to maintain balance. The location of the switch box should be placed as close as possible to the control of the electrical equipment.
(3) to ensure that the temporary electricity distribution system three-phase load balance, the construction site of power and lighting electricity should form two electricity circuits, power distribution box and lighting distribution box should be set separately.
(4) Construction site All electrical equipment must have its own special switch box.
(5) the distribution box at all levels of the box and the internal installation must meet the safety requirements, switching appliances should be marked with the use of the box should be unified number. Stop the use of the distribution box should be cut off the power, the door lock. Fixed distribution box should be set up fence, and there are anti-rain measures.
(6) the difference between the distribution box and the distribution cabinet. According to GB / T20641-2006 "low-voltage switchgear and control equipment, the general requirements of empty shell"
Distribution box is generally used in the family, and distribution cabinets are used in centralized power supply, such as industrial electricity and construction electricity, distribution boxes and distribution cabinets are all complete sets of equipment, distribution box is low-voltage complete sets of equipment , Power distribution cabinet with high pressure has a low pressure.