Surge protection and lightning protection

Surge protection and lightning protection

Surge protection refers to the protection of systems and electrical devices against excessively high voltage peaks caused by switching operations and lightning strikes. An effective lightning protection strategy combines internal and external lightning protection. Protect the power supplies, data, and signals in your system. Use the reliable surge protection solutions available in our various product ranges as part of your internal lightning protection strategy.

More information

Product Family

Your advantages

  • Protection for all common applications and signals with the complete product portfolio
  • Versatile fields of application – designs and connection technologies for every application
  • Space-saving and inexpensive installation, thanks to the slim design
  • Know what’s happening in advance with cloud-based monitoring or predictive testing of pluggable protective devices

New products

Type 1+2+3 combined lightning current and surge arrester – for universal use in the unmetered area
Surge protection type 1+2+3 combined lightning current and surge arrester
For universal use in the unmetered area

The DIN-rail mountable type 1+2+3 combined lightning current and surge arrester meets the highest lightning protection requirements in accordance with category III/IV. It can be installed flexibly, especially in the unmetered area, due to its compact design. 

These are the main features

  • Installation in the unmetered area due to spark gap technology free of leakage current
  • Integration of the SPD into the internal system monitoring via remote indication contact 
  • More space for additional components in the control cabinet thanks to a slim design

These are the advantages

  • Tested in accordance with IEC standard T1 + T2 + T3
  • Combined lightning current and surge arrester free of leakage current
  • Can be used at altitudes up to 3,000 m
  • Available with remote signaling

TERMITRAB complete – protection for four conductors or two pairs
Surge protection for MCR technology
Protection for four conductors or two pairs

The product range of TERMITRAB complete has been expanded to include the compact surge protective devices for four- and two-wire applications in measurement and control technology.

These are the main features

  • Efficient use of space with the narrowest pluggable surge protection for four conductors or two pairs
  • Easy function monitoring: On site or optionally via remote signaling, with optical monitoring, without additional effort
  • Tool-free maintenance through simple insertion and removal of the surge protection module

These are the advantages

  • Space savings of 50%
  • Tool-free maintenance
  • Mechanical status indicator on the device
  • Optional remote signaling capability

Protective circuit principle and protection concept

Protective circuit principle and protection concept

Protective circuit principle and protection concept

You should plan a protection concept for lightning and surge protection so that all cables, devices, and systems are protected.

The protective circuit principle is easy to illustrate:
Draw an imaginary circle around the object you want to protect. Surge protective devices must be installed at all points where cables intersect this circle. This ensures that the area within the protective circuit is protected in such a way that conducted overvoltages are prevented.

When planning the protection concept, consider the following areas of application:

  • Power supply
  • Measurement and control technology
  • Information technology
  • Transmitters and receivers

An effective protective circuit helps ensure seamless surge protection.

Surge protection standards

Surge protection standards

When it comes to surge protection, which standards must be observed?

National and international standards provide a guide to establishing a lightning and surge protection concept as well as the design of the individual protective devices. They differ depending on region and field of application. The overarching standard is lightning protection standard IEC 62305. It describes protective measures against lightning events and an extensive risk analysis with regard to the necessity, scope, and cost-effectiveness of a protection concept.

Surge protection fields of application

FLT SEC type 1+2 special surge protection in main distribution

FLT SEC type 1+2 special surge protection in main distribution

Surge protection for power supplies

Our type 1+2, type 1+2 special, type 2, or type 3 surge protective devices provide effective protection for your electronic devices. From feed-in to the termination device, we provide convenient, ready-to-install solutions for all applications.

Narrow surge protection for signals in the control cabinet

Narrow surge protection for signals in the control cabinet

Surge protection for MCR technology and signals

A large number of signals are controlled and monitored in measurement and control technology (MCR technology) applications. Our protective devices prevent malfunctions and damage caused by overvoltages and offer an ideal solution for any application.

Surge protection for information technology in the control cabinet

DT-LAN protects against overvoltages from the data network

Surge protection for information technology

Data interfaces are particularly sensitive to overvoltages, because they operate with low signal levels and high frequencies. Use our surge protection solutions for interference-free data transmission with the same bandwidth in your IT systems.

Surge protective device for the protection of transceiver systems with antenna amplifiers

C-SAT-BOX protects connected TV and HiFi devices from overvoltages

Surge protection for transceiver systems

Transceiver systems are particularly at risk from overvoltages. Antenna cables that extend beyond the building and the antennas themselves are directly exposed to atmospheric discharges. Play it safe with our powerful, coaxial surge protective devices.

Ready-to-install string combiner boxes with surge protection for photovoltaic systems

Ready-to-install string combiner boxes with surge protection for photovoltaic systems

String combiner boxes for photovoltaic systems

String combiner boxes are required to provide optimal protection for photovoltaic systems against lightning strikes and overvoltages. Our ready-to-install string combiner boxes can be connected immediately, and are reliable system solutions that protect the inverter directly from DC and AC voltage inputs. Surge voltage couplings are discharged directly to the ground potential.

ImpulseCheck monitors type 1+2 special surge protection device in the main distribution

ImpulseCheck monitors type 1+2 special surge protection device in the main distribution

Testing and monitoring devices

ImpulseCheck is the world’s first intelligent assistance system for surge protection in the field of mains protection, allowing you to monitor your systems in real time. The system permanently records the state of the system. The state of health of the surge protection device is known at all times, so you can prevent a failure soon enough.

To manually test pluggable surge protection devices in accordance with the requirements of IEC 62305, use CHECKMASTER 2 as a mobile test device. Performing recurring precautionary checks will allow you to avoid failures of your systems and machines.

Isolating spark gaps for discharging overvoltages on an insulating flange

Isolating spark gaps for discharging overvoltages on an insulating flange

Isolating spark gaps

When overvoltages occur for a short period (for example, due to a lightning strike), isolating spark gaps connect metallic bodies which must not be permanently galvanically connected during operation. For  example, protect sensitive insulating flanges in pipelines against sparkover and avoid failures, downtimes or leaks.