Blue Live Tank Circuit Breaker

Bringing Zero closer: 3AV1 Live Tank Circuit Breaker

With Zero F-gases and Zero harm, this 72.5 - 145 kV circuit breaker makes a greener grid achievable

Why we need to go for Zero. And why you need Blue.

With the energy sector having a greater carbon impact than every other industry combined, the urgent need for decarbonization to combat climate change cannot be overstated. Renewable energy sources are only part of the solution; at Siemens Energy we understand how essential it is to achieve Zero Global Warming Potential (GWP) in the transmission of power as well as in its generation. Most switchgear still uses SF6 for insulation – a gas 25,200 times more climate-hostile than CO2 and one which stays in the atmosphere for up to 3,200 years. Even the new F-gas alternatives are still harmful to the environment when released. That’s not sustainable, as recognized by the new EU-F-gas-regulation. And it’s why we’ve developed our Zero-harm Blue portfolio, including the 3AV1 live tank circuit breaker.

When traditional technology is still needed

While we are continuously striving for Zero, it is not yet possible for every voltage level. Thats why we still offer a range of high-performance traditional switchgear.

Zero SF6, Zero greenhouse gases - only clean air

The only way to achieve Zero GWP and Zero toxicity is by using clean air. The 3AV1 live tank circuit breaker combines vacuum switching technology with clean air insulation. It operates with Zero harmful greenhouse gases of any kind, with Zero toxic decomposition products and Zero safety requirements during handling and maintenance.

The clean air used – consisting of 80% nitrogen and 20% oxygen, cleaned and free of humidity – can be released into the atmosphere with Zero harmful effects to people or the environment.  This represents a vital step towards the goal of achieving Zero GWP throughout the energy grid.


At the same time, the 3AV1 live tank circuit breaker maintains the highest standards of performance and reliability. It delivers high voltages with the highest switching performance without degradation, and is capable of operating in extreme environmental conditions across the globe.

Essential facts and features

Blue circuit breakers: future-ready and future-proof

Further readings

Our live tank standard portfolio

Live tanks for rated voltages up to 1100 kV

While we are fully committed to the implementation of clean air technology, the fact is that in the short term there may be circumstances where it cannot yet be used, such as the need for super-high voltage levels. For these situations, we continue to offer a range of high-performance traditional switchgear.

Our high-voltage circuit breakers, regardless of type or voltage range, are designed in a well proven modular platform concept. This leads to a high diversity of types and high flexibility with regard to our customers’ requirements. They are available for single- and three-pole operation, either with a common base (FG) or with separate bases (FI) and can be equipped with optional closing resistors for applications from 362 kV up to 1100 kV. Moreover you can chose between porcelain or composite insulators.

Our services for you

You can find details on our live tank circuit breakers and information about our services here.

We can gladly help you with installation, commissioning, diagnostics and malfunctions

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