The huge market of Qingbaijiang design
This paper systematically expounds the design basis, principles, methods and conclusions of the electrical design of a large shopping mall in Qingbaijiang.
This paper expounds the design basis, principles, methods and conclusions of electrical design of various systems in a shopping mall in Qingbaijiang.
This design includes power supply and distribution, lighting, TV monitoring, lightning protection and grounding, automatic fire alarm system, etc. The TV, telephone and network are reserved, and their sockets and configurations will be completed before the next renovation.
This design includes power supply, lighting, TV monitoring, lightning protection and grounding, automatic fire alarm system, etc. TV, telephone and Internet are the qualifications and configurations, and the reservation will be completed in the next step. decorate
First of all, in the design of high voltage power supply and distribution system, radial system is adopted to enhance its power supply reliability and control flexibility, and the distribution voltage is 630V, so as to determine the distribution network structure.
Firstly, in the design of high voltage power supply system, radial system is adopted to enhance the reliability of power supply and the flexibility of control, and the distribution voltage is 630 V and the distribution network structure is determined.
Calculate the load of distribution trunk line and select 500KVA dry-type transformer;
Select load calculation for distribution line, a 500 KVA transformer;
Select the section, type, distribution trunk path and laying method of high voltage cable.
Select the section, model, distribution trunk line and laying method of high voltage cable.
Secondly, in the design of low-voltage distribution system, the number, position and trend of vertical distribution trunk lines and horizontal distribution trunk lines are determined;
Secondly, in the design of low-voltage distribution system, the number, position and trend of vertical distribution trunk lines and horizontal distribution trunk lines are determined;
Load calculation, calculated at 80 watts per square meter;
Calculated by load, 80 watts per square meter;
Select the sections and forms of switchgear, conductors, cables and enclosed buses;
Select the sections and forms of switchgear, wires, cables and enclosed buses;
Select the protection device and calculate the low-voltage reactive power compensation capacity;
Select the protection device and calculate the low-voltage reactive power compensation capacity;
TN-C-S grounding system is adopted in the design of protective grounding and repeated grounding system.
Design of protective grounding and repeated grounding system, and determine to use TN-C-S grounding system.
Thirdly, in the design of automatic fire alarm system, each floor has a loop, which improves the accuracy. When the fire signal is confirmed, the spray pump and broadcast alarm system can be started.
Thirdly, in the design of automatic fire alarm system, each floor is equipped with a loop to improve the accuracy. When the fire signal is confirmed, start the spray pump and broadcast the alarm system.
Forced start of emergency lighting, cut off the non-fire power supply, stop the escalator and use it as an emergency passage.
Forced start of emergency lighting, cut off power supply, fire and emergency service escalator access.
Finally, in the lightning protection grounding system, according to the national standards, through calculation, three types of lightning protection are adopted, and the design is carried out according to the requirements of three types of lightning protection buildings.
Finally, in the lightning protection grounding system, according to the national standards, through calculation, three lightning protection methods are adopted, and the design is carried out according to the requirements of three lightning protection buildings.