Stoen Operator with first indoor high-voltage switchgear in Poland that is free of SF₆ gas

Stoen Operator, responsible for electricity distribution in the Warsaw area, is contracting the first indoor switchgear in Poland free of SF₆ gas, with a maximum voltage of 123 kV. This step will reduce the use of fluorinated greenhouse gases.

Stoen Operator and Siemens Energy have signed a contract for the delivery of one of the most advanced switchgears on the market—Siemens Energy’s 8VN1 model—to the Batory Distribution Substation (RPZ).

A key ecological component

High-voltage switchgears operate at a nominal voltage of 110 kV in distribution substations. They are used to manage electrical circuits during both normal and fault conditions. They play a crucial role in the safe and efficient operation of the power system.

In such indoor switchgears, sulfur hexafluoride (SF₆) is still commonly used for insulation and arc quenching. Despite its excellent technical properties and its use in sealed enclosures, SF₆ is a potent greenhouse gas. According to the European Parliament and EU Council regulations, its use will be banned in new electrical devices with voltages up to 123 kV starting January 1, 2028.

Air and vacuum instead of gas

The switchgear ordered from Siemens Energy does not use any greenhouse gases. SF₆ has been replaced with clean air and vacuum technology. This solution complies with upcoming EU regulations that restrict the use of fluorinated gases, which are widely used in industry but have a high global warming potential (GWP). The 8VN1 switchgear has a GWP of 0, making it a future-proof choice.

“We are a leader in innovative energy solutions in Poland. In line with our strategy, we not only invest in breakthrough technologies but also support environmentally friendly initiatives. The use of vacuum and clean air insulation in the 8VN1 switchgear fits perfectly with our goals. We are reducing greenhouse gas emissions, promoting eco-friendly technology, and gaining valuable experience needed to meet evolving environmental and regulatory requirements,” said Robert Stelmaszczyk, CEO of Stoen Operator.

In addition to its environmental benefits, the new switchgear also offers operational advantages, such as excellent switching capabilities for both operational and short-circuit currents. Its hermetically sealed design protects against external factors that may cause degradation, ensuring a long service life without the need for additional maintenance compared to current solutions.

Source: https://www.cire.pl