16370-2

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Terminal blocks are a type of electrical device used to securely join together two or more electrical wires and cables. The most widely used terminal blocks are categorized, in terms of their physical appearance, into two main types: break-before-make (BB) and make-before-break (MBB). Generally, BB terminal blocks are usually mounted on PCBs, while MBB blocks are more often found in harsh industrial environments.

16370-2 is an international standard issued by the German Industries Association (VDE) and establishes requirements for terminal blocks used for power distribution. According to 16370-2, terminal blocks are designated as “electrical connectors” and are designed for a specific current carrying capacity. The 16370-2 standard specifies the general characteristics and technical requirements for terminal blocks used for power distribution.

The primary purpose of 16370-2 is to ensure that any electrical connector used for power distribution meets certain basic safety standards. This is accomplished by detailing the materials, construction, testing, and marking requirements for each type of terminal blocks. The standard also details requirements for the design, construction, and testing of accessories such as mounting bases, terminal strip assemblies, mud guards, and strain reliefs. Additionally, the standard discusses the distinction between captive style and loose style terminals.

The basic working principle of terminal blocks is relatively simple. The two main parts that constitute a terminal block are the male and female contacts. The male contacts are the pins that are inserted from the back side of the block and the female contacts are the slots that the pins are inserted into on the front side of the block. Once the pins are inserted into the female contacts, an electrical connection is established, allowing current to flow through the block and from it to its destination.

The various components within a terminal block are typically held together by screw clamps, thumbscrews, or a combination of both. The screw terminals inside the block ensure that the electrical connection remains secure and that it is capable of withstanding extreme temperatures and high levels of vibration. Additionally, certain terminal blocks feature barriers and separators to protect against electrical short circuits and to route power in a safe, efficient manner.

In summary, 16370-2 application field and working principle represents an international standard that allows terminal blocks to be used safely in power distribution applications. The standard details the materials, construction, testing, and marking requirements for terminal blocks along with specifications for accessories such as mounting bases and strain reliefs. The working principle of terminal blocks is fairly straightforward – the male and female contacts are connected in order to establish an electrical connection, and the connection is secured by the screws and other components within the block.

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