Home » Sulfur Hexafluoride Gas (SF6) Properties
Switchgear & Protection

Sulfur Hexafluoride Gas (SF6) Properties

Sulfur Hexafluoride Gas (SF6) Properties

  • Heavy, chemically inert, non toxic
  • No poisonous effect on the human body but decomposition products are poisonous
  • Color less and odor less
  • It is gaseous at normal room temperature and pressure
  • Density is about 6.6g/l at 20oC (5 times denser than air)
  • Critical temperature is at 45.6oC and can be liquefied by compression
  • Very good insulant with high dielectric strength
  • SF6 gas is electo-negitive ( tends to attract the free electrons and has the arc quenching property). Because of this main reason SF6 gas is used for arc quenching and insulation medium in circuit breakers.
  • The gas is highly stable
  • Unlike solid insulation materials, electrical breakdown of sf6 gas does not result in permanent deterioration of its properties.
  • Decomposition occurs on the exposure to the electric arc. (Disassociation products will be SF2 and SF4 lower order fluorides)

Related Articles

Methods to Reduce Step Potential and Touch Potential in Substation

S Bharadwaj Reddy

Advantages & Disadvantages of Oil Circuit Breakers

S Bharadwaj Reddy

Substation Safety Clearances

S Bharadwaj Reddy

Advantages and Disadvantages of Air Blast Circuit Breakers

S Bharadwaj Reddy

What Is Step and Touch Potential and Reducing Resistance To Ground?

S Bharadwaj Reddy

Creepage Distance for Insulators in Substation

S Bharadwaj Reddy

Leave a Comment

This website uses cookies to improve your experience. We'll assume you're ok with this, but you can opt-out if you wish. Accept Read More

Sulfur Hexafluoride Gas (SF6) Properties

 
WordPress Image Lightbox

Send this to a friend