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How is the voltage distributed when GDT and MOV are used in series？
Jun 25 , 2025
Without lightning surge voltage, that is, under normal power frequency voltage, the voltage distribution of MOV (metal oxide varistor) and GDT (ceramic gas discharge tube) is mainly affected by their electrical characteristics. 1. GDT (Ceramic Gas Discharge Tube): GDT has extremely high parallel impedance (about 1TΩ) and extremely small parallel capacitance (below 1pF) unde...
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What are the main standards for surge protection device?
Jul 03 , 2025
1. Main standards for lightning protection application design IEC 62305-1:2010/GB/T 21714.1-2015 《Protection against lightning-Part 1: General principles》 IEC 62305-2:2010/GB/T 21714.2-2015 《Protection against lightning-Part 2: Risk management》 IEC 62305-3:2010/GB/T 21714.3-2015《Protection against lightning-Part 3: Physical damage to structures and life hazard》 ...
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What's surge protection device?
Jul 10 , 2025
Surge, also known as voltage surge or surge, is a common phenomenon in power systems, usually referring to sudden current or voltage fluctuations. Such fluctuations may be caused by lightning strikes, grid failures, switch operations or other reasons. Power surges can cause serious damage to power equipment and electronic equipment, and even lead to safety issues such as fire. Surge protection dev...
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