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Application Field and Working Principle

Terminal blocks are electrical connection devices which are designed to provide a mechanical and electrical connection between two or more electrical components. They are used mainly in the interconnection of electrical wiring or power distribution systems and mainly in an industrial environment, such as in electrical power, lighting, telecommunications and automation systems. In simple terms, they are common electrical connectors. Terminal blocks can be divided into two categories: headers and plugs/sockets.

Headers

Headers are installed at the line side, usually with a top entry. The main function of the headers is to provide a reliable electrical connection between multiple lines of the power distribution system. They also offer a safe connection, and they are designed to be maintenance-free. Headers are traditionally used as a mechanical assembly of electrical components. Some of the most common applications for headers include connecting control, communication and metering systems, power distribution systems, and data-logging systems.

Plugs and Sockets

Plugs and sockets are used to connect power cords (also known as cordsets) to other devices, and they are most commonly used for plug-in devices. Plugs and sockets allow for easy connection of the devices by removing the need to individually wire each device. Plugs and sockets are mainly used in appliances, power tools and other equipment. They provide control and power to a variety of applications, and are typically used in the industrial, office, or commercial application. In addition, they provide protection with built-in over-voltage and over-current protection.

Working Principle

When a plug and socket are connected, the two connecting components are put into contact via the contact materials. This provides an electrical connection between the two components. The contact materials are usually made of metal, such as copper, or plastic/fiber materials, such as polyethylene (PE) or polypropylene (PP). The materials used in the construction of the plug and socket components determine their electrical and mechanical properties.

When a plug and socket are connected, the electrical current passes through the plug and then through the socket. The current then flows from the socket through any internal wiring and connections in the system. This allows the electrical current to travel from one device to another. The current is then divided up according to the electrical load that the system needs to supply.

Conclusion

Terminal blocks are widely used in various fields of industry, from power distribution to automation. They offer a reliable, simple, and cost-effective electrical connection between multiple components. Headers are used to provide a mechanical and electrical assembly, while plugs and sockets are used to connect power cords. The contact materials used in the construction of the components determine the electrical and mechanical properties, and the current is then divided up according to the electrical load needed to be supplied.

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