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sf6 Load break switch 66 kv gis switchgear leakage test Siemens

Vacuum Circuit Breakers Testing Methods - Switchgear Content· The leak-rate test (MAC test):This test is based on the Penning Discharge Principle which is named after Frans Michael Penning (1894-1953). Penning showed that when a high voltage is applied to open contacts in a gas and the contact structure is surrounded with a magnetic field, the amount of current flow between the plates is a function of the ...

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