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750kv sf 6 circuit breaker Chile

750kv sf 6 circuit breaker Chile

gaz sf6 circuit breaker and its types - Electrical Paathshala Sulfr hexafluoride gas is an electronegative gas, it means that it has high tendency to absorb the free electrons. When there is a fault in the system, then the current carrying contacts starts separating and an arc struck between them due to ionization of the surrounding medium. Huge number of free electrons generated due this ionization. When the insulating gas gas molecule reacts with the free electrons, then they form negative immobile ions which is shown by the reaction below. These negative immobile ions are heavier as compared to free electrons and they do not get sufficient energy to lead cumulative ionization in the gas under a given electric field. This process makes dielectric strength of the medium very high and the arc gets extinguished. Sulfr hexafluoride gas cools the arc much effectively.

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