Solar cable laying techniques
In the operation of photovoltaic power stations, operation and maintenance personnel pay special attention to the failure and operation of key components such as inverters, combiner boxes, and components. This is understandable. After all, their normal operation is related to the normal operation and work of the entire photovoltaic power station. However, what is easily overlooked in construction design is the construction of solar cables!
Cables also play a vital role in the overall profitability and operational safety of photovoltaic power stations. Their construction is also the most scientific and sophisticated in the photovoltaic power station construction system. Scientific cable construction can not only reduce power station damage, improve efficiency, and enhance reliability, but also increase the benefits of power station owners.
So what is a solar cable? Solar cables refer to cables used for power transmission in the DC side circuit of a solar photovoltaic power station system. They have excellent physical properties such as resistance to high and low temperatures, UV radiation, waterproof, salt spray, weak acid and alkali, aging resistance, and flame retardancy. It can be seen that the importance of solar cables is self-evident!
So, what is the laying process of solar cables? First of all, there is construction preparation. After preparation, the line is laid, and then the cable insulation test and cable laying are carried out. After laying sand and bricks, the hidden project acceptance is carried out, and then the backfill soil and cable insulation test are carried out. After these processes are completed, the landfill sign piles and hanging line number plates can be carried out. However, during the laying process, pay attention to the following details.
1. Preparation work before cable laying: including engineering measurement, environmental testing, material preparation, etc., to ensure that the construction effect can meet expectations. At the same time, environmental testing and evaluation should be carried out to understand the climate, geology, electromagnetic interference and other conditions in the construction area, and to formulate construction plans and safety measures.
2. Precautions in cable laying: including construction safety and protection, compliance with safety operating procedures, wearing protective equipment, and setting safety warning signs. The waterproof and sun protection of the cable, especially when installed outdoors, requires special attention. Ensure that the cable insulation layer is intact, take waterproof measures, and select anti-ultraviolet materials.
3. Maintenance and inspection after cable laying: Regularly check the cable insulation performance, joint connection, bracket fixation, etc., and deal with any problems found in a timely manner.
What are the laying techniques for solar cables? The laying of solar cables is a key step in the photovoltaic power generation system. Correct laying techniques can not only ensure the stable operation of the system, but also extend the service life of the cable!
The first is the selection and cross-sectional area of the cable. The appropriate cable cross-sectional area should be selected according to the maximum current demand of the system. Make sure that the cross-sectional area of the cable matches the working current to avoid waste due to too large a cross-sectional area, or heat and excessive loss due to too small a cross-sectional area, or even fire. Then the laying method should be considered comprehensively according to the engineering conditions, environmental characteristics, cable type, quantity and other factors. Common laying methods include direct burial laying, pipe laying, laying in bridges, laying in cable trenches, etc. If laying is carried out on the surface of a building, the overall beauty of the building should be considered, and cables should be avoided from being laid on the sharp edges of walls and brackets to avoid cutting and grinding the insulation layer to cause a short circuit, or cutting the wires due to shear force to cause a break. On the contrary, if the cable is protected by a cable bracket box, cable tow rope, or cable tie fixing, the cable should be protected from damage due to direct exposure. When the cable enters the junction box or threading hole, a waterproof bend should be made to prevent water from entering the house or the chassis along the cable. Finally, it is necessary to consider environmental factors, such as the impact of wind, sun, rain, corrosion, etc. on the cable, to ensure that the cable insulation layer can withstand these conditions. Special treatment should be given to the cable joints to prevent oxidation and poor contact, and tinning or soldering should be performed when necessary.
By following these laying tips, the laying quality of solar cables and the stability of the system can be effectively improved, and the efficient and safe operation of the photovoltaic power generation system can be ensured to the maximum extent! Through the application of these tips, the safety and reliability of photovoltaic system cables can be significantly improved, the service life of the cables can be extended, and maintenance costs can be reduced.
