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We are proud of our advanced elastomer technology which has enabled us to develop high voltage connectors for the energy market.

Our products are used worldwide to connect underground high voltage cables for electrical transmission and distribution.

The wide product range provides high voltage connectors with a range between 50kV and 550kV.

High voltage connectors

The ultimate example of a best in class elastomer solution

At Ruma, we develop, manufacture and supply a wide range of high voltage connectors.



As the world transitions towards improved environmental sustainability and clean energy utilization, we place critical importance on our environmental impact. We therefore strive to maximize the durability of our products in order to minimize environmental impact while simultaneously managing in-house energy consumption and supporting sustainable waste management practices.


R&D creates added value

High-voltage connectors are a good example of development that requires all R&D elements: compound development, product development and process development.


Compound development

Our high-voltage connectors are developed using a range of advanced polymers that meet the highest standards. Electrical conductivity, insulation and field control are integrated into one product. This has resulted in a product that meets the most demanding requirements.


Product development

The design of the moulds is made within the R&D department. State-of-the-art software is used for this, which further optimizes product performance.


Process development

The set-up of the production process is developed by our R&D department as well. This forms the basis for a stable production performance for our high-end products.

Our goal:

Putting elastomers to work