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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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Surge Protection Device (SPD) Installation Guide
Aug 01 , 2025
Electrical surges can damage sensitive electronics, leading to costly repairs or replacements. Installing a Surge Protection Device (SPD) is a proactive way to safeguard your home or business from voltage spikes caused by lightning, power grid fluctuations, or switching transients. This guide covers the key steps for proper SPD installation to ensure maximum protection. 1.&nbs...
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Selection of Uc, Up,Iimp and In for Surge Protective Devices (SPDs)
Aug 20 , 2025
Selection of Maximum Continuous Operating Voltage Uc and Voltage Protection Level Up for Surge Protective Devices (SPDs) According to the requirements of national standards GB 50343-2012 and GB/T 18802.12-2024, the principle of rated impulse withstand voltage Uw * 0.8>SPD voltage protection level Up should be followed before the wire enters the system. If Uc is chosen to...
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What is the basic principle of the surge protection device remote signal terminal and how does it achieve communication?
Aug 28 , 2025
The remote signal terminal of the surge protection device is the key interface for remote monitoring of the SPD status. Its core function is to convert the SPD operating status (such as normal, faulty, tripped, etc.) into a transmittable electrical signal and transmit it to the remote monitoring system (such as the distribution automation system, computer room monitoring system, etc.),...
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What are the main reasons that affect the tripping of surge protection device?
Sep 04 , 2025
The tripping of a surge protective device (SPD) is a response to a fault condition by its built-in safety mechanism. Essentially, it disconnects the device from the circuit through mechanical or electronic means to prevent the fault from escalating. Its tripping behavior is directly related to the characteristics of the SPD's core components, surge parameters, system operating conditions, and envi...
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What is the difference between ROHS and REACHR certification?
Sep 09 , 2025
Some customers require Rohs and Reach certification for surge protection devices, let’s talk about ROHS and REACH this time.Both ROHS and REACH are important EU environmental regulations, but their scope of application, control objectives, and specific requirements differ significantly. The core differences are as follows: 1. Full name and core purpose of the regulation ·ROHS:The full name is...
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