Condition Evaluation for Opening Damper of Spring Operated High-Voltage Circuit Breaker Using Vibration Time-Frequency Image

The working condition of opening damper directly affects the opening mechanical characteristics and component lifetime of high-voltage circuit breaker (HVCB). Vibration diagnostic technique is a noninvasive and efficient way for on-line evaluation of the opening damper. Vibration time-frequency image which constructed by using the method of time-frequency analysis (TFA) contains rich feature information of opening damper's working condition. In...