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What are the main reasons for the continuous increase in the leakage current of varistor (MOV)?
Apr 16 , 2025
There are three main reasons why the leakage current of the MOV in the SPD continues to increase and thermal breakdown occurs during the normal working life: 1. The frequency and amplitude of surge overvoltage at the SPD installation site are large, causing the MOV's inherent ampere-second resources to be exhausted prematurely and enter the degradation failure stage. ...
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What are the requirements for the installation of the connecting wires at both ends of the SPD?
Apr 08 , 2025
Regardless of TN system or TT system, the connection wires at both ends of the SPD connected to the live conductor and PE line should be short and straight. The IEC standard stipulates that the total length of the SPD connection wire should not exceed 0.5m. This is because the lightning impulse current has high-frequency characteristics, and the lightning impulse overvoltage applied to the ...
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What are the components of the intelligent lightning protection system? What are the advantageas?
Apr 01 , 2025
The intelligent lightning protection system introduces the concept of intelligence into the lightning protection system, integrating the three major modules of "intelligent SPD online monitoring" + "lightning warning online monitoring" + "ground resistance online monitoring". It uses modern microcomputers and communication technologies to collect monitoring and collected data, so that lightning pr...
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Why do we need to conduct regular lightning protection inspections on buildings?
Mar 25 , 2025
1. Required bythe standard 1）Required by the standard, the national standard is mandatory GB 50057 Design code for protection of Structures against lightning： Article 4.5.4 clearly requires that lightning protection devices should be inspected regularly, generally once a year;toflammable and explosive places, the inspection cycle needs to be shortened to once every six months. Article 6....
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Why do need to install SPD after installing lightning rod? What is the core difference between SPD and lighting rod?
Mar 19 , 2025
1. The role and limitations of lightning rods Intercepting direct lightning strikes: Lightning rods attract lightning through tip discharge and safely conduct lightning current into the earth through down conductors, protecting building structures from damage by direct lightning strikes. Limited protection range: The protection range of a lightning rod depends on its height and rolling ball r...
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Suggestions for the installation location of SPDs
Mar 03 , 2025
Suggestions for the installation location of SPDs In the electrical system, surge protevtion devices (hereinafter referred to as SPDs) are like safety guards, protecting the safety of electrical equipment. Their installation locations are not determined at random, but strictly follow relevant standards and specifications. Only by comprehensively considering standards and actual factors and a...
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The Importance of Surge Protection Device in Industrial Settings
Feb 25 , 2025
The Importance of Surge Protection Device in Industrial Settings In today’s highly automated and technology-driven industrial environments, the reliance on sensitive electronic equipment and machinery is greater than ever. From programmable logic controllers (PLCs) to sensors, communication systems, and data centers, these components are critical to maintaining productivity and efficienc...
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What is the difference between 3P+1 and 3P+N?
Feb 20 , 2025
The SPD combination modes include nP, nP+N, and nP+1. 3P+1 mode is used to raise the voltage (for example, the JLSP-GA750/100/3P+1 in the photovoltaic series is used to raise the voltage).The N in 3P+N refers to the addition of a gas discharge tube (under the action of this electric field, the gas inside the gas discharge tube begins to be ionized. When the external voltage increases to ...
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2024 Annual Meeting of the Academic Committee of Building Electrical and Intelligent Buildings of Wuxi Civil Engineering Society
Dec 12 , 2024
On November 30th, 2024, the Academic Committee of Building Electrical and Intelligent Building of Wuxi Civil Engineering Society was held in Wuxi Picturesque Hotel, representatives from more than 20 electrical equipment manufacturers attended the annual meeting. Anhui Jinli Electric is a technical service company specializing in the research and development, manufacturing, sales and ...
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Pursuing excellence and striving for "gold" to ensure quality - Jinli's first skills competition
Dec 04 , 2024
In this season full of vitality and innovation, we welcome the first Jinli Lightning Protection Production Skills Competition whichaims to stimulate employees' enthusiasm for learning professional skills through a series of carefully designed competition projects, promote the collaboration ability and technical level among teams, and also build a good platform for knowledge exchange an...
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