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The Copper-Chromium (CuCr) contact material is the most widely used material for the contacts of the vacuum interrupters (VI). Performance of the VI is greatly influenced by the properties of contact materials. During switching operations, such as short-circuit current interruption, a vacuum arc is generated which in turn produces melted and resolidified layers at the contact surface. Melting followed...
Non-grain oriented electrical steel, with minor in-grain orientation gradients, was subjected to interrupted tensile deformations and concurrent microtexture, magnetic property and residual stress measurements. After the upper yield point, clear signatures of mechanical stress relief were observed. Changes in orientation gradients led to annihilation of low-angle (1 to 3 deg) boundaries. Prior deformation...
The Vacuum interrupter is the arc extinction chamber of the vacuum circuit breaker which is widely used in the medium voltage networks for interruption of short -circuit current. In the field of vacuum switching devices, the contact material is the most important parameter determining the switching behavior. During arcing, the contacts are eroded and hence there is a change in the surface microstructure...
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