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Two mass erosion mechanisms or mass loss modes for electrodes during the repetitive arcing processes should be responsible for the failure of electromagnetic relays, and there are evaporation erosion and sputter erosion. Of these two, the evaporation erosion is believed to be the main failure mechanism for the electrodes used in low-current relays. Unfortunately, there is still no straight-forward...
The break arc simulation model for aerospace relay is built based on the magneto-hydrodynamics (MHD) theory. The contact erosion is considered and the electrical conductivey of the plasma sheath in the arc root region is equalized in this model. The static arc characeristics with silver vaper and nitrigen are acquired with the computational fluid dynamics (CFD) software FLUENT. The effect of the silver...
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