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Explosion protection technical requirements for common flameproof and intrinsically safe products

2021-07-20View Original

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Due to their special properties, many explosion-proof electrical products do not belong to a single explosion-proof category; rather, they are a combination of two or more such categories. Such as lighting fixtures, there are those that are explosion-proof, intrinsically safe, and encapsulated ; As for intrinsically safe and flameproof products, common examples include network base stations, signal collectors, and intrinsically safe and flameproof power supplies (which are widely used in coal mines). https://pic4.zhimg.com/80/v2-cf65b8a2e097da7c7ba56a23376ff3df_720w.jpg Base station products come equipped with various communication interfaces such as RJ45, RS232, RS485, etc.; some of them also have POE interfaces. When using these interfaces, there is always a risk of excessive power flow to some extent. Therefore, if intrinsically safe design is to be adopted, isolation measures such as the use of safety barriers are necessary, which can have an impact on the performance of the product. Therefore, an explosion-proof enclosure can be considered for protection; all communication interfaces are placed inside the enclosure, while the signal wires are led out through explosion-proof connection devices to connect with gateways or data acquisition devices located in a safe area. However, with an explosion-proof enclosure, wireless signals cannot be transmitted; by placing the antenna externally and making it intrinsically safe, this problem can be effectively avoided. https://pic1.zhimg.com/80/v2-78be01ce90f5c8c511f784a2f1fdfcac_720w.jpg For power supply products, such as flameproof power supplies, a flameproof enclosure is installed outside the power supply; it is used primarily to supply power to flameproof equipment. An intrinsically safe power supply ensures that the electrical sparks and thermal effects generated by the output circuit under normal operation or specified fault conditions cannot cause ignition; it is typically used to power intrinsically safe equipment. A flameproof and intrinsically safe explosion-proof power supply possesses the characteristics of both types, meeting the requirements of both flameproof and intrinsically safe explosion-proof power supplies. It is widely used in hazardous environments such as mines that contain flammable and explosive substances, to provide a stable power supply for the equipment in these locations. https://pic4.zhimg.com/80/v2-7e6f643baf7c257bfb94f0d06e4d76d7_720w.jpg That’s all for this article for now; if you want to learn more about explosion-proof technology, feel free to follow us! Original article; copying and redistribution are strictly prohibited!

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