The structure of different shafts vacuum circuit breaker

Analysis of its main causes: First, the impact of closing rigidity is too large, resulting in occurrence of axial moving contact bounce; two movable contact rod guide is bad, shaking too large; Third transmission links gap is too large; Fourth contact plane perpendicular to the central axis is not good, timely hitting, etc. due to the transverse sliding. The product has been formed, the whole air circuit breaker rigidity is a foregone conclusion, the scene generally can not be changed. For the movable contact rod guide is bad, the coaxial structure, the contact with the conductive rod spring is directly linked, without intermediate transmission parts, so there no gap. For the structure of electric meter shafts type vacuum circuit breaker, the contact between the spring and the movable contact rod has a triangular steering crank arm, link with three pins, which there are three gaps easily occur in the process of closing bounce, this is the key to air circuit breaker. Should also attach importance to the contact pressure spring began conducting rod end to adjust the gap between the drive so that the drive links as compact as possible, unbuffered gap; if because interrupter contacts generated by bad end vertical bounce, you can interrupters were rotated 90 °, 180 °, 270 ° installation, looking up and down the contact surface consistent position, it is not when you need to replace the interrupter. In the process of closing bounce handling, remember all the screws should be tightened to avoid interference by the tremor.