Abstract:A reliable anti-bouncing circuit can effectively prevent high-voltage circuit breakers from abnormal bouncing, which is of great significance for ensuring the safety of personnel, power grid and equipment. The design and testing methods of anti-bouncing circuit are discussed. The typical principle, common defects and corresponding measures in practical engineering of anti-bouncing circuit are described, and then the differences between two testing methods are compared. It is pointed out that the inspection for current testing methods is not comprehensive enough. Therefore, an optimization measure is proposed, that is, adding the potential measurement of external terminal of closing monitoring branch, which ensures the comprehensiveness and effectiveness of acceptance of anti-bouncing circuit.