Abstract: A fault diagnosis apparatus (100) and method (1200) for a circuit breaker (200), comprises at least one sensor (101) coupled to at least one mechanism (201) arranged in the circuit breaker (200) and configured to obtain waveform data of a parameter over time, the waveform data related to an operation state of the at least one mechanism (201); and a processing unit (102) coupled to the at least one sensor (101) and configured to analyze the waveform data to obtain at least one feature value (1220); determine a dissimilarity between the at least one feature value and a threshold matrix (1230); and in response to the dissimilarity being greater than a threshold dissimilarity, determine that the at least one mechanism (201) has a fault (1240). With the fault diagnosis apparatus (100), the fault in the at least one mechanism (201) of the circuit breaker (200) may be determined in advance.

Abstract: The present invention provides a transmission and clutch device of an electric chassis and the electric chassis. The transmission and clutch device includes a transmission shaft, a first drive shaft, a first compression spring, a first gear, a second compression spring and a second drive shaft successively along an axial direction, the first drive shaft and the second drive shaft are fixed together, the transmission shaft is provided for connecting to a motor, and the first gear is fixed on a base in a rotatable manner, wherein the first drive shaft is connected with the transmission shaft in a relatively sliding manner and can rotate synchronously along with the drive shaft; and two end faces of the first gear are each opened with a keyway for separably cooperating with a protrusion of an end face of the first drive shaft or a protrusion of an end face of the second drive shaft.

Abstract: Embodiments of the present disclosure provide a method for monitoring a circuit breaker, comprising the following steps: obtaining a characteristic force associated with an actuating mechanism of the circuit breaker over the time; and determining the time point when the closing and/or opening of the circuit breaker occurs by identifying a variation of the force. The step of determining further comprises determining the moment when a variation increase of the characteristic force occurs as the time point of the closing of the circuit breaker; and determining the moment when a variation decrease of the characteristic force occurs as the time point of the opening of the circuit breaker. The method can be used to accurately on-line monitor the closing and opening time point of the circuit breaker.

Abstract: The present invention provides a drive device for a middle-high voltage vacuum circuit breaker chassis, which comprises a drive motor (10), a clutch (11) and a drive chain wheel (12); the clutch (11) is installed on an output shaft of the drive motor (10), the drive chain wheel (12) is directly fixed with the clutch (11), and the drive chain wheel (12) is driven by the drive motor (10) through the clutch (11). The drive device further comprises a driven chain wheel (13) and a chain (14) or a belt, the driven chain wheel (13) is fitted over a lead screw (15) of the chassis; and the driven chain wheel (13) is driven by the drive chain wheel (12) through the chain (14) so as to drive the lead screw (15) to rotate together. The drive device further comprises a position locking device (39), which is insertable into a recess (37a-c) on the lead screw (15) to lock the chassis.

Abstract: A pivot supporting structure for a circuit breaker and a circuit breaker. The pivot supporting structure includes: a supporting body having a supporting hole for receiving and pivotally supporting a pivot pin connected to an actuating mechanism of the circuit breaker, wherein at least one strain gauge are mounted to the supporting body for sensing the force acting on the pivot supporting structure by the actuating mechanism. This pivot supporting structure can accurately sense the characteristic force applied, such that the contact force and mechanical characteristics of the circuit breaker can be on-line monitored.

Abstract: The present invention provides a transmission and clutch device of an electric chassis and the electric chassis. The transmission and clutch device includes a transmission shaft, a first drive shaft, a first compression spring, a first gear, a second compression spring and a second drive shaft successively along an axial direction, the first drive shaft and the second drive shaft are fixed together, the transmission shaft is provided for connecting to a motor, and the first gear is fixed on a base in a rotatable manner, wherein the first drive shaft is connected with the transmission shaft in a relatively sliding manner and can rotate synchronously along with the drive shaft; and two end faces of the first gear are each opened with a keyway for separably cooperating with a protrusion of an end face of the first drive shaft or a protrusion of an end face of the second drive shaft.

Abstract: The present invention provides a drive device for a middle-high voltage vacuum circuit breaker chassis, which comprises a drive motor (10), a clutch (11) and a drive chain wheel (12); the clutch (11) is installed on an output shaft of the drive motor (10), the drive chain wheel (12) is directly fixed with the clutch (11), and the drive chain wheel (12) is driven by the drive motor (10) through the clutch (11). The drive device further comprises a driven chain wheel (13) and a chain (14) or a belt, the driven chain wheel (13) is fitted over a lead screw (15) of the chassis; and the driven chain wheel (13) is driven by the drive chain wheel (12) through the chain (14) so as to drive the lead screw (15) to rotate together. The drive device further comprises a position locking device (39), which is insertable into recess on the lead screw (15) to lock the chassis.

Abstract: A pivot supporting structure for a circuit breaker and a circuit breaker. The pivot supporting structure comprises: a supporting body having a supporting hole for receiving and pivotally supporting a pivot pin connected to an actuating mechanism of the circuit breaker, wherein at least one strain gauge are mounted to the supporting body for sensing the force acting on the pivot supporting structure by the actuating mechanism. This pivot supporting structure can accurately sense the characteristic force applied, such that the contact force and mechanical characteristics of the circuit breaker can be on-line monitored.

Abstract: Embodiments of the present disclosure provide a method for monitoring a circuit breaker, comprising the following steps: obtaining a characteristic force associated with an actuating mechanism of the circuit breaker over the time; and determining the time point when the closing and/or opening of the circuit breaker occurs by identifying a variation of the force. The step of determining further comprises determining the moment when a variation increase of the characteristic force occurs as the time point of the closing of the circuit breaker; and determining the moment when a variation decrease of the characteristic force occurs as the time point of the opening of the circuit breaker. The method can be used to accurately on-line monitor the closing and opening time point of the circuit breaker.