Surge arresters

Surge arresters – effective protection of the electrical installation

In the modular equipment category, surge arresters play an extremely important role, protecting the electrical installation against dangerous voltage surges. These devices protect against the effects of lightning discharges, induced surges, and network failures, which can damage electronic equipment and lead to costly downtime.

Types of surge arresters – match the protection level

Depending on the system requirements and the facility's location, different types of protection are used:

• Type 1 (Class B) – protection against direct lightning strikes, used at the entrance to the building, usually in facilities with a lightning protection system.
• Type 2 (Class C) – protection against induced or indirect surges, installed in the main distribution boards of residential and industrial buildings.
• Type 3 (Class D) – additional protection close to receivers (e.g., computers, controllers, RTV), used in conjunction with types 1 and 2.

The offer also includes DIN rail surge arresters, which ensure quick installation in standard electrical distribution boards.

How do surge arresters work?

Surge Protective Devices (SPDs) detect a sudden increase in voltage and redirect excess energy to ground in a fraction of a second, before it reaches sensitive installation components. They operate on the principle of spark gaps, varistors, or suppression diodes, depending on the design and protection level. Regular use of SPDs significantly reduces the risk of equipment failure, fires, or damage to electrical infrastructure.

Where should surge arresters be used?

Such protection should be included in every electrical distribution board – in single-family homes, multi-family buildings, as well as industrial and office facilities. They are particularly recommended for installation in locations with high concentrations of electronic devices or where there is a risk of lightning-induced surges. Surge arresters are often combined with other protection elements, such as differential current circuit breakers or overcurrent circuit breakers.

Modern and safe solutions

We offer surge arresters from renowned manufacturers, equipped with status indication, replaceable inserts, and the ability to integrate with monitoring systems. Their technical parameters – such as the Up protection level, maximum discharge current Imax, or rated voltage Uc – allow you to match the product to a specific installation. This allows for complete protection not only of power lines, but also of control systems, alarms, and building automation.

Choose effective surge protection

Choosing the right surge protection device is an investment in the safety of the entire electrical installation. Even a momentary overvoltage can lead to irreversible losses in electrical equipment – ​​so it's worth using protection tailored to the building's protection class and the type of installation. Our product range includes a full range of modular devices that will allow you to create comprehensive and effective surge protection.