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The Second "Jinli Cup" Production Skills Competition Concludes Successfully, Showcasing Craftsmanship and Skill!
Dec 04 , 2025
On November 26, 2025, the highly anticipated Second Jinli Cup Production Skills Competition was held. With the core theme of "Crafting Dreams with Ingenuity and Achieving Success through Skills", the competition attracted 54 contestants, including professional and skilled backbones from the production line and colleagues from many functional departments. They competed in five core events, showcasi...
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What is the basic principle of SPD remote signal terminal and how does it achieve communication?
Dec 11 , 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.), thereb...
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What is SPD energy coordination?
Dec 17 , 2025
The so-called energy coordination means that when multiple levels of SPDs or protective elements have different discharge capacities and are used together, the lightning current must be reasonably distributed to ensure that the SPDs or elements with smaller discharge capacities are not damaged. As shown in the figure below, SPD1 has a high discharge capacity and a high residual voltage, while SPD2...
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Application Sharing: Selection, Installation, and Maintenance of Surge Protection device
Dec 25 , 2025
Sudden electrical malfunctions, unexplained equipment damage, and even occasional electrical fires are often related to "transient overvoltages," commonly known as "surges." These invisible "electrical shocks" can be caused by lightning strikes, turning appliances on or off, or interference from the power grid, making them "invisible killers" for electrical equipment. Surge protection device ...
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Application scenarios of signal SPDs in series and parallel connection Series connection
Jan 06 , 2026
Series connection This mode connects the SPD directly in series with the signal transmission channel, so that the surge current and signal flow share the same path. Its core value lies in ensuring the integrity of high-speed signals: Applicable scenarios: High-bandwidth systems such as Gigabit Ethernet (≥1Gbps), USB 3.0+, HDMI 2.0, 3G-SDI video, and radio frequency (RF). These scenarios require im...
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When a thunderstorm occurs, is it better to stay as far away from large trees as possible in open areas outdoors?
Jan 14 , 2026
Most people know that you shouldn't stand under a large tree during a thunderstorm. Searching online for similar questions often yields answers like "stay away from isolated large trees" or "the farther away from trees, the better," as these types of accidents are most common. However, these statements are not entirely accurate and are somewhat one-sided. In open areas, isolated large trees act li...
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What are the differences between Single-port SPD and two-port SPD?
Jan 22 , 2026
The distinction between single-port and two-port surge protective devices (SPDs) is essentially a professional classification based on their circuit topology and connection method within the circuit. A single-port SPD exhibits a parallel connection structure in its electrical configuration, with all its external terminals directly connected in parallel to the protected power or signal lines. The i...
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