Surge protection & earthing material

Safe solutions for your electrical project

Surges are one of the most common causes of damage to electrical equipment - whether due to lightning strikes, switching operations or mains faults. Comprehensive protection against overvoltage is therefore not a luxury, but an absolutely necessary measure to protect human life, sensitive devices and installations. At WATT24 you will find a wide range of surge arresters, earthing materials and lightning protection components - from leading brands such as ABB, ABN, Dehn, Eaton, Phoenix Contact and Mersen. Whether for retrofitting or for new buildings: We offer you everything you need to protect your power grid safely and in line with standards.

abb overvoltage protection

abn overvoltage protection

dehn overvoltage protection

eaton overvoltage protection

phoenix contact overvoltage protection

grounding material

What is overvoltage - and why is it dangerous?

An overvoltage is a short-term increase in voltage that significantly exceeds the rated voltage. It is usually caused by switching operations, residual current events or lightning strikes.
Direct or indirect lightning strikes in particular cause dangerous voltage peaks in the power grid - with potentially fatal consequences for electronic components, control systems or entire systems.

In contrast to slow mains fluctuations, overvoltages act spontaneously - they occur in a flash and leave sensitive devices no time to react.
Without suitable protective devices, damage often occurs in sub-distribution boards, cable ducts or to devices connected to sockets.

Surge protection according to plan

The protection levels at a glance

Complete surge protection is made up of several stages - from the coarse protection component at the building entrance to the fine protection on end devices. This structure also follows the VDE standard and the classification according to overvoltage categories:

Type 1 arresters (lightning current arresters): Used to discharge high lightning currents - often equipped with a spark gap and installed in buildings with an external lightning conductor.
Type 2 arresters (SPDs): Limit overvoltages caused by mains circuits and indirect lightning strikes. Often installed in sub-distribution boards.
Type 3 arresters (fine protection): Protect sensitive equipment at device level, e.g. in socket strips or directly in front of sensitive electronics.

The combination of spark gaps, varistors and decoupling ensures a graduated protection level that distributes the energy in a targeted manner and dissipates it in a controlled manner.

Earthing material

The protective basis for all down conductors

Every surge arrester needs a functioning earthing system. Earthing material ensures that dangerous currents are safely discharged to earth via lightning current arresters - without any repercussions on other components or the system's busbar.

We have earthing materials for every application:

Foundation earth electrodes for standard-compliant new buildings
Deep earth electrodes for difficult ground conditions
Equipotential bonding bars and busbars
Earthing straps, earthing cables and connection clamps

Choosing the right material is crucial: while copper is highly conductive, stainless steel variants are more resistant to chemical stresses. Hot-dip galvanized steel is a common solution in the concrete sector.

Our manufacturers at a glance

ABB - innovative protective devices and surge arresters for industrial and commercial applications
ABN - specialized in surge protection in PV systems
DEHN - pioneer in lightning protection, offering high-quality lightning current arresters and standard-compliant solutions
Eaton - high-performance SPDs and solutions for distribution boards of all sizes
Phoenix Contact - modular protection devices, also suitable for retrofitting
Mersen - international leader in surge and protection technology for complex systems

Your advantages at WATT24

Large selection of protection systems, earthing materials and lightning protection components
Expert advice for your individual application
Fast delivery and fair prices
Products from leading manufacturers
Know-how for individuals, tradesmen and planners

Install the right surge protection now

Whether you are planning a new system or want to retrofit existing cable ducts: We support you in selecting suitable components for standard-compliant lightning protection and effective surge discharge - from the main distribution board to the last socket.

Surge protection & earthing material

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What is overvoltage - and why is it dangerous?

Surge protection according to plan

Earthing material

Our manufacturers at a glance

Your advantages at WATT24

Install the right surge protection now

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Surge protection & earthing material

Filter

Filter

What is overvoltage - and why is it dangerous?

Surge protection according to plan

Earthing material

Our manufacturers at a glance

Your advantages at WATT24

Install the right surge protection now