432103-25-0

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Terminal Blocks - Barrier Blocks

Barrier blocks are terminal blocks – connection devices commonly used in electrical control cabinets – that provide simple installation and flexibility when connecting several wires. This article discusses the application field and working principle of barrier blocks in more detail.

The Application Field

Barrier blocks have a wide range of applications. They are frequently used to replace hard wiring in applications such as electrical test panels, interlocks and more. In addition, they are often used to connect electrical components and equipment in control and automation systems. They are also common in the shipbuilding, aerospace and rail industries.

The strength of barrier blocks lies in their convenience. The installation process is very simple, which requires no pre-assembly of multiple wires, resulting in an improved installation experience for technicians. Moreover, barrier blocks provide flexibility as the user can easily add, replace or rearrange wires without having to use additional jumper wires.

The Working Principle

Barrier blocks consist of several different parts. At the rear is an insulated plastic body and at the front, a combination of colorful plastic insulation shells and insulated conductive strip. The conductive strip forms the contact points, and each terminal block is usually separated by 14, 20, 30, or 35mm. A barrier block allows multiple wires to be connected to a common circuit. Typically, insulation between wires is credited to the plastic insulation shells.

The bottom contact consists of more than one terminal where the insulation between them is overcome when the wire is inserted so the current is allowed to flow from side to side. In some barrier blocks, these terminals are able to act as disconnect contacts for when the wires need to be removed and replaced. This is usually done using a standard tool such as a screwdriver. Additionally, plating on the contact points minimize the risk of corrosion, and contact springs create a tight connection between the wire and the terminal block.

Conclusion

In conclusion, barrier blocks provide a simple and efficient way to connect multiple wires in the electrical industry. The 430213-25-0 barrier block is one of the more popular models offering a highly reliable connection while using a simple installation process. With this, they are suitable for applications where a large number of connections needs to be organized in a neat configuration.

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