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The Vacuum Circuit Breakers (VCBs) are typical types in the medium voltage distribution switches, and the internal pressure (P) in the vacuum interrupters affects the working quality and life. With the development of national smart power grids and the maintenance system based on reliability, on-line monitoring of the internal pressure in the vacuum interrupters becomes necessary and urgent. With the...
The reliability and intelligence of vacuum circuit breakers related to the digitization of the substations directly, however, the internal pressure in vacuum interrupters (VIs) is an important indicator parameter of the breaking capability and life. To realize the On-line condition monitor of VIs' internal pressure, weighting the domestic and international on-line monitoring method, we select the...
Potential on middle shield of vacuum interrupter is one of techniques to determine the degradation of pressure in vacuum interrupters. Extensive research on the component of the shield potential and the cause of its conformation was done, certain results were obtained in theory and experiments. However, among multiple interpretations in causes of interrupter shield potential, there are still no accepted...
To improve the intelligence and reliability of the vacuum circuit breakers in power gird, a high accurate smart system was designed for On-line condition monitor of vacuum interrupters inner pressure. Through the study of dielectric theory and exploration of the inherent laws of shield potential with different pressure in VIs, it shows that with the deterioration of internal pressure the AC component...
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