Contact Electro-erosion Assessment of Generator Circuit Breaker Based on Vibration-fingerprint-RQA

Generator Circuit Breakers (GCB) is a critical component in large-scale hydropower and nuclear power stations, characterized by high rated currents and the capacity to break shortcircuit currents with high DC components. During interruption, high-energy arcs cause severe erosion to moving contacts, significantly affecting the equipment's electrical life. Since contacts are sealed within arc chambers, direct observation is impossible. Consequently, engineering relies on indirect evaluation methods like loop resistance measurement, which tend to be inaccurate. To address this, this paper proposes a novel indirect assessment method based on