Switchgear components require high quality

Switchgears work as huge circuit breakers and are very important in electrical transformer units and stations. In an electrical switchgear, several individual circuit breakers are grouped into one huge unit capable of handling disconnection of extreme amperages. This is why switchgears are important in many different situations:

  • In the event of fluctuations, instability or other faults in an electrical circuit that makes it necessary to disconnect power, the switchgear will automatically do it. So a switchgear works as a fuse.
  • When alterations or other work is to be carried out on a high-voltage circuit, the power is switched off using a switchgear. Working on such electrical circuits can entail the risk of lethal danger if the high-voltage power is not completely disconnected, so it is of the utmost importance that switchgears are reliable.

These functions must always work 100%, so it is very important to use high-quality materials for the production of switchgear components.

Electrotechnical composite materials for switchgears – why?

We produce three different types of composite materials: Etronit, Etronax and G-Etronax. Both Etronit and G-Etronax have electrotechnical properties, but it is primarily G-Etronax that is commonly used for the production of switchgear components.

G-Etronax is produced from a glass base in combination with various types of specially developed resins. G-Etronax offers amazing electrotechnical and mechanical properties. It is our strongest type of material and can also be machined to very fine tolerances.

Depending on the requirements to the individual switchgear, we often recommend producing switchgear components from the following types of G-Etronax:

  • G-Etronax PM GPO3 in white or red. This type has the highest arc and tracking current resistance of all our materials.
  • G-Etronax EP 11 if there are thermal requirements. This material has the best thermal stability and is generally very resistant.
  • G-Etronax EP FR4 if the materiel needs to be fire-retardant.
  • G-Etronax EP 10, G-Etronax EP 22 and G-Etronax EP E203 are other good choices if there are no requirements to thermal and fire-retardant properties.

For some purposes, Etronit types Etronit I, Etronit IR and Etronit IS may also be used to produce switchgear components.

If you want to explore our materials further or find out more about the many possibilities for identifying the exact right solution for precisely your requirement, you can look up the specific data for all our materials via our Material Finder. You can download both technical and safety data from there, and it goes without saying that we are always ready to help you, so please do get in touch for information and advice.

Quality ensures thick-walled tubes without contraction cracks

It is crucially important that switchgear components are always completely reliable, as switchgear faults can have extreme consequences.

For use with switchgears, components machined from a base of very thick-walled tubes made of G-Etronax EP 10, G-Etronax EP 11 or G-Etronax EP 22, are frequently used. These thick-walled glass/epoxy tubes are used as insulation material to completely stop the power regulation instantly. This is why the quality of the tubes must be very high and the tubes completely flawless.

Thick-walled tubes with contraction cracks are a frequently observed problem. The contraction cracks occur when the mandrels are removed from the finished tubes. If the material does not have the right composition and has not been produced and wound correctly, contraction cracks will occur when the tubes harden. These contraction cracks become visible when the tube is removed from the mandrels, and the internal diameter of the tube collapses. Contraction cracks are a major quality problem in relation to switchgears and other electrotechnical applications, as they can result in the deterioration of the functionality and reliability of the component.

As specialists in the production and machining of composite materials, we can guarantee thick-walled tubes for electrotechnical applications without contraction cracks. Throughout the production process, the materials are subjected to quality assurance to ensure that your components are always immaculate.

Elektro-Isola – your specialist in innovative composite solutions

Since 1921 we have been developing, producing and machining composite materials to precision. Thanks to our great expertise, not to mention experienced and dedicated employees, we can help you with electrotechnical as well as mechanical solutions.

In addition to this, we provide decorative composite solutions and are thus your one-stop shop for any challenge you need solved.

Our materials are some of the best in the world, and it is a matter of pride for us to deliver finished components that represent the absolute best quality on the market. Do please get in touch to hear more about the many possibilities for customer-specific composite solutions. No challenge is too big, and we look forward to solving yours.

Benefits to you

  • Electrotechnical properties
  • Quality-assured production processes
  • Over 100 years of experience

Properties of switchgears

Electrotechnical properties

Suitable for electrical insulation and other electrical applications.

Chemical resistance

Withstands the effects from a wide range of chemicals which can damage many other materials.

Mechanical properties

Suitable for applications where the materials are exposed to mechanical impact.

Thermal stability

The material remains functional and retains its properties even at high temperatures.

Resistant to tracking current

The electrical insulation properties of the material are not affected by tracking current.

No contraction cracks

Thick-walled tubes without contraction cracks ensure high quality.

Industries using switchgears

Do you have a unique requirement?