High Voltage Circuit Breakers Arcing Contacts Operational Condition Indices Extracted from the Dynamic Resistance and Contact Motion Trajectory

The utmost importance of high voltage circuit breakers in the electrical power grid highlights the essential need for their reliability. To ensure this, accurate condition assessment methods for core components like the main contact system are crucial. Dynamic resistance measurement plays a key role as it assesses arcing contacts' condition without contact chamber disassembly. This paper endeavors to meticulously investigate and illuminate the pertinent indices derived from dynamic resistance measurements and motion trajectory waveforms, showcasing their efficacy through two real-world case studies conducted under varied testing scenarios. The analysis underscores the proposed indices' effectiveness, enhancing comprehension of the arcing contact assessment method.