1, AL0 1-lighting distribution box code/number
2. Main parameters of distribution box: installation capacity Pe= 15.6KW, demand coefficient Kx=0.8, calculated load Pj= 12.5A, power factor COS φ = 0.9, and calculated current Ij = 21.1a..
3.ZRYJV-5 * 10- Power incoming cable, XLPE insulated PVC sheathed flame retardant (copper core) cable, with 5 cores, and the cross section of each core is 10 mm2 (the laying mode of incoming cable is not specified in this article).
4.C65-40A/3P- Main incoming switch, Schneider miniature circuit breaker C65 series, 40A, 3 poles.
5.L 1, L2, L3- Phase sequence of outgoing circuit.
6.c65- 16A/ 1P- output circuit breaker, unipolar 16A
7.c65-20a/ 1p+Vigi 30mA- outgoing line leakage circuit breaker, with an operating current of 30mA (electronic or electromagnetic).
8.wl 0 1- Lighting socket circuit, No.0 1
ZrBV-3 * 2.5-SC20FC-PVC insulated flame-retardant (hard copper core) wires, 3 wires, with specifications of 2.5 square meters. SC20 passes through a thick-walled metal pipe (steel pipe) with a diameter of 20mm, and FC is buried underground.
9.WP 0 1- distribution outlet circuit, No.0 1.
(Conductor, laying method, etc.)
10, lighting, socket-specify electrical equipment, appliances, or use.
1.0KW, etc. -Installation capacity of electrical appliances (or all loads of circuits)
be filled/suffused/brimming with
The system diagram has the following purposes:
1. According to the location of AL0 1 marked in the plan, the installation location and method can be determined (usually the installation method is uniformly stated in the design description), and the line can be laid according to the incoming and outgoing lines marked in the plan.
2. It can provide power consumption parameters for superior power distribution equipment.
3. The distribution box can be customized according to this drawing (surface-mounted/concealed).
4, can debug lines, inspection and acceptance.
Question 2: How to understand the circuit system diagram, regardless of strong current, weak current, analog and digital, we must first understand the symbols of each unit element. The new and old national standards should be mastered by heart, and the working principle, characteristics and functions of each unit component should be mastered. Master the working principle and analysis method of various basic unit circuits. The Legend of Typical Circuits of Practical Electricians published by Water Resources and Hydropower Press contains detailed explanations of various basic unit legends of electricians. And some typical schematic analysis of the whole machine and power distribution, which is very beneficial to beginners and intermediate learners. An integrated circuit manual (with commonly used integrated circuit block diagram and pin function) can be bought in major bookstores. Beginners should not look at the circuit diagram of the whole machine first, but step by step. Because there are many unit circuits, some components in the unit circuits are scattered or far away from the unit, so it is difficult for beginners to read the drawings. Starting from the block diagram-unit circuit diagram, the equivalent circuit diagram-complete machine circuit diagram covers a wide range. It takes a long time to understand a complete circuit quickly, which is not clear here. Step by step learning is very important, and the theoretical basis of electricity is very important. As the saying goes, it is difficult to get quick success at first, and soon you will encounter bottlenecks. If you have a preliminary electrical foundation, it is recommended to study electrotechnics from Higher Education Press first, which is a difficult point in the circuit diagram. Let me briefly talk about the following knowledge of digital circuits. You can learn 1, binary and binary code, decimal code step by step. Include differential circuit, integral circuit, limiting circuit, multi-resonant oscillation circuit, monostable and bistable circuit, etc. ) 3. Logic gates (AND, OR, NAND, NOR gates) 4. Flip-flop circuit (RS flip-flop, JK flip-flop, D and T flip-flop are required) 5. Combinatorial logic circuit (basic arithmetic unit, comparator, parity judging circuit, coding, etc.). ) This is beyond the scope of electronic technology analysis. Although you don't need to be familiar with the software, it is also difficult to understand the process, purpose and result of software processing signals. After you have the basic knowledge of digital circuits, you must be familiar with the signals of digital circuits. Because it is a digital signal of various pulse trains, the waveforms of these data stream signals can't be as helpful to the understanding of the circuit as analog circuits, so you should be mentally prepared.
Question 3: What do you think of this distribution system diagram? In the first row, 15 represents power, in the second row, 30 represents calculated current, in the third row, the number of socket loops, and in the fourth row, the cable size.
Question 4: What do you think of this electrical system diagram? 40A has 1 chip (three-phase), and the total area of power cord is 6 square millimeters. There are three 1P (single phase) 15A open wires, and each 15A open wire uses 2.5 square millimeters. There is a 3-hole socket (25A), and the power cord is also 2.5mm2 ... 25a1p (single-phase), and the terminal is not connected for the time being. ) 40A's three-phase open outlet is connected with three 15A and three 1P's 25A, and there is the inlet end of the socket. There are three wires in 15A for lighting, and the outgoing wires are 2.5mm square copper wires (the zero wire and the live wire should be the same size, because they are used for lighting. )
Question 5: What do you think of the electrical system diagram? On the far left is the incoming cable, model and laying method, then the circuit breaker model, and finally the outgoing cable, and the power of each loop. Draw it yourself. Just compare the number of circuits in your distribution box and remove some circuits, and the circuit breaker with leakage protection in the socket will be circled. No lighting is needed. Then calculate the current according to the power, and select the corresponding wire size and circuit breaker size, which is almost the same.
Question 6: What do you think of the lighting trunk system diagram? The red line above represents the trunk line, which is YVJ-4 * 150+ 1 * 70(4 pieces 150 mm2 plus 1 70 mm2, 4 pieces 150 phase line and zero line, 1 root.
The advantages of the puncture clip are simple installation, low cost, safety, reliability and maintenance-free. Cables can be branched without cutting the main cable and stripping the insulation layer of the cable. The connector is completely insulated, which can be used for live working and can be branched at any position of the cable. No junction box or junction box is required. The joint is torsional, shockproof, waterproof, corrosion-resistant and aging-resistant. Using insulated puncture connector as cable branch has obvious comprehensive benefits, and its cost performance is better than the traditional connection method. )
The outgoing branch line adopts fire-resistant YVJ-5-core 4-way cable -NH-YVJ-5 * 4 (the gray line below refers to this).
Question 7: How to judge the size of the box on the building power system diagram? There are certain industry standards on the building power system diagram, and the specifications of distribution boxes are different, but the basic information such as circuit breaker model, cable specification model and fuse specification model are still marked comprehensively. According to these, the load capacity that the cabinet can bear can be calculated.
Question 8: How can I read the power system diagram? There seems to be no specific description on the drawings of those reserved holes when installing water supply and drainage pipes. The power system diagram shows the hierarchical relationship between electrical boxes. For example, the first floor is the distribution box of the whole building, the second floor is the distribution box of each floor, and the third floor is the distribution box of each household. Distribution boxes have incoming and outgoing lines.
The reserved hole for water supply and drainage is a hole reserved in advance according to the plane position of wall column and beam slab on the structural drawing and in coordination with civil engineering. If you don't leave holes, you have to make holes in the concrete.
Question 9: How to draw electrical system diagram with CAD? Use Tianzheng Electric 8.0 and CAD2006, that is, Zheng Zheng Electric 8.0 the next day, and then install it in the CAD directory, which contains many strong and weak current and line symbol components.