go to the Gas-insulated switchgear product page Anonymous asked on Jan 7th, 2015 in Gas-insulated switchgear

GIS manufacturers call the operating principle of circuit breakers differently: arc-assisted, auto puffer, self-blast etc. Could you explain the differences?

Olav Knudsen , Principal Engineer, Gas-insulated switchgear

ABB's answer

The world of high-voltage SF6 breakers basically splits into self-blast and puffer breakers. Puffer breakers contain a cylinder and piston to compress cold SF6 gas. The cylinder emits the compressed gas into the arcing zone and interrupts the arc at the proper time. A self-blast breaker uses an additional trick. The arc itself generates a gas flow which helps to emit the cold gas from the cylinder. Self-blast breakers require smaller drives and mechanical operating energy and are more efficient than puffer breakers. Whereas all manufacturers use the term puffer breakers, self-blast breakers come with different names: auto-puffer, arc-assisted puffer, self-compression breaker, etc. They all mean basically the same. For further information, I recommend an excellent article "Circuit Breakers go High Voltage" by Denis Dufournet, published in the IEEE Power & Energy Magazine Jan/Feb 2009, pp 34-40 or the ABB Buyer's Guide for Live Tank Breakers IEEE article "Circuit Breakers go High Voltage" (http://ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=4723862) ABB's Live Tank Circuit Breakers - Buyer's Guide (http://search-ext.abb.com/library/Download.aspx?DocumentID=1HSM 9543 22-00en&LanguageCode=en&DocumentPartId=&Action=Launch)

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Area expert

  • Olav Knudsen

    Olav Knudsen

    Principal Engineer, Gas-insulated switchgear

    High Voltage Products

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