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Post-arc current in high voltage SF6 circuit-breakers when breaking at up to 63 kA

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2 Author(s)
Blez, B. ; Electr. de France, Paris, France ; Guilloux, C.

Post-arc current measurements were made on a high-voltage SF6 circuit breaker. A pyrotechnic device was used to protect the measurement shunt. The tests, performed at high current values between 40 and 63 kA, gave post-arc current levels of 0.5 to 2 A. Interpretation of the experimental results by the generalized Mayr model led to the determination of a set of parameters characteristic of the apparatus tested, thereby making it possible to find the test results and, in particular, to forecast cases of thermal failure

Published in:

Power Delivery, IEEE Transactions on  (Volume:4 ,  Issue: 2 )

Date of Publication:

Apr 1989

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