Interlocking devices / mains load limitation

Mains limitation device

Definition: Mains limiting devices are also called interlocking devices.

Due to many large power consumers in factory buildings, there can be dips in the mains voltage because of the high peak loads. These dips can lead to machines no longer working correctly, for example, welding spots suddenly no longer holding.

In such cases, the maximum mains load must be limited in such a way that the mains voltage no longer collapses. For this purpose, machines are grouped into meaningful units. These units are then unlocked or temporarily blocked by network limitation devices. This enabling or blocking is taken over by the NBS and happens fully automatically.

Whether mains limiting devices are necessary depends on the connected load that is accessible in the factory.

Tip: If problems suddenly occur after the installation of a new system, even though the old systems previously worked perfectly, the peak current may be too high and the grid will buckle. In this case, please contact your system builder. He will help you further whether a mains limitation device is necessary or a larger connection value from the electricity supplier is required.