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“Thunder and Snow”
Dec 23 , 2021
Thunder is common in summer, because the ground temperature is high, and convective clouds are more likely to form when warm and humid air rises, which creates conditions for lightning. In areas with relatively large undulations, thunder and rain are more common. This is because the warm air is blocked by mountains during the horizontal movement to form convection. In winter, the ground temperatur...
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Concept of neutral and grounding
Dec 29 , 2021
Neutral connection: The neutral point of generators and distribution transformers is called the zero point, and the line drawn from the neutral point is called the neutral line. The metal shell of electrical equipment connected to the neutral line is called Neutral connection. Working grounding: The neutral point of the transformer of the power supply system is directly grounded as the w...
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carbon peak and carbon neutrality
Dec 31 , 2021
In the context of carbon neutrality, my country is building a new power system with new energy as the main body. "New energy + energy storage" is considered the direction of the energy revolution. As the most active field of energy storage technology, large-scale electrochemical energy storage is helping the development of new power systems. New energy has the advantages of multi-dimensional obser...
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The difference between wave welding and reflow soldering
Jan 04 , 2022
Wave soldering is a tin bar into a liquid state by tin slots, using a motor to form a peak, allowing the PCB to weld to the part, generally used in the hand-in-in-box soldering and SMT glue plate. Re-flowing welding is mainly used in the SMT industry, which is conducted by hot air or other thermal radiation, melting the solder paste printing on the PCB and welded. Different: Wave weld the flux, an...
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Considerations on installing lightning straps and lightning protection network
Jan 04 , 2022
The lightning protection belt and its connecting line pass through a settlement ditch (settlement ditch: a long multi-storey building, which often divides the building into several sections horizontally, leaving a gap between sections to prevent inconsistent settlement of each section. When causing damage to the building), a spanning cable with an expansion and contraction margin of 10-20cm or mor...
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Main methods to improve SPD reliability
Jan 07 , 2022
Product upgrading is the law of industry development. People usually pay attention to the performance and quality of the product, and often ignore the time quality of the product, that is, reliability. The launch of any new product should provide users with product performance quality, time quality, and economic indicators. The main methods to improve SPD reliability include: a. Manufacturers impr...
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How to reasonably select cables for photovoltaic system?
Jan 21 , 2022
In recent years, the technology of the photovoltaic industry has developed faster and faster, the power of a single module has become larger and larger, and the current of the string has become larger and larger, the current of high-power modules has reached more than 17A. Using high-power components and reasonable matching can reduce the initial investment cost and kWh cost of the sy...
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New energy construction
Mar 02 , 2022
1.Improve building renewable energy application standards, encourage building-integrated photovoltaic applications, and support the use of solar energy, geothermal energy, and biomass energy to build renewable energy building energy supply systems. 2. Focus on desert, Gobi, and desert areas, accelerate the construction of large-scale wind power and photovoltaic power generation bases, upgrade exis...
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