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TOKSELELEKTROTECHNIK

Service · Type 1, 2 and 3, earthing, bonding

Surge protection

Overvoltages caused by lightning or switching operations can destroy sensitive electronics in a fraction of a second. We design and install a coordinated protection concept – from the incoming supply to the end device.

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Surge arrester and 125 A fuse switch disconnector below the copper terminals of a main distribution board
Surge protection with back-up fuse at the incoming supply

Surge protection

Scope of services

  • 01Lightning current and surge arresters type 1, 2 and 3
  • 02Combined arresters in main and sub-distribution boards
  • 03Protection of control and data lines
  • 04Main earthing terminal and protective equipotential bonding
  • 05Retrofitting in existing installations
  • 06Inspection and replacement of tripped arresters

Your benefits

  • Required

    For new and substantially modified installations, DIN VDE 0100-443 requires surge protection in most cases.

  • Coordinated

    Staged protection diverts energy where it occurs – before it reaches your equipment.

  • Cost-effective

    An arrester costs a fraction of what a failed controller, server or inverter would.

Standards & regulations

We work to the recognised rules of technology, including:

  • DIN VDE 0100-443
  • DIN VDE 0100-534
  • DIN EN 61643-11
  • DIN VDE 0100-540

From our projects

Sub-distribution board with NH fuse strips, fuse switch disconnector and four-pole surge arrester
Sub-distribution board with surge protection
PE bar with earthing strip and braided copper conductor next to a wiring duct with control cables
Equipotential bonding and earth connection
Distribution box with copper bars and connected cables next to an enclosure with surge protection
Distribution box with copper bars

FAQ

Frequently asked questions

Is surge protection mandatory?

For new and substantially modified installations, DIN VDE 0100-443 requires protective measures against overvoltages in most cases. We will gladly check what applies to your installation.

Do I also need a lightning protection system on the roof?

External lightning protection is a separate trade. Independently of it, internal surge protection protects your electrical installation – we advise you on the right combination for your building.

How can I tell whether an arrester has tripped?

Modern arresters have a status indicator, usually a window that changes from green to red. During maintenance we check every arrester and replace tripped modules.

More services

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Guides

More guides

Our guides answer the questions our clients ask most often – from DGUV V3 inspections to a new meter cabinet.

All guides
Protection

October 15, 2026 · 4 min read

Surge protection: when is it mandatory under DIN VDE 0100-443?

Lightning strikes and switching operations generate voltage spikes that destroy electronics in a fraction of a second. When protection is mandatory in Germany and what a sensible protection concept looks like.

Read more
Testing & safety

October 15, 2026 · 5 min read

DGUV V3 inspection: obligations, intervals and procedure for businesses

Anyone who employs staff in Germany must have electrical installations and equipment inspected regularly. We explain the obligations, the guideline inspection intervals and how a DGUV V3 inspection works.

Read more
E-mobility

October 15, 2026 · 5 min read

Installing a wallbox: registration, § 14a EnWG and what to check beforehand

A wallbox charges faster and more safely than a household socket. For everything to run smoothly, the connection, registration and controllability should be right from the start.

Read more

Contact

Discuss your project?

Tell us about your plans – we will gladly advise you and prepare a transparent quotation.

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