A mechanical system for predicting the erosion extent or the remaining life of conatcts in switching devices consisting of contacts in an enclosed chamber

摘要

The present invention provides a mechanical system for indicating the extent of erosion of contacts in switching devices. The system comprises: an erosion indicator shaft(s) coupled with a vacuum interrupter(s) by connecting means; a coupling mechanism comprises a contact spring support and a contact spring for connecting the connecting means with a movable driving shaft; a compression spring for connecting the indicator shaft (s) with the movable driving shaft coupled with the connecting means ; a clamp means for clamping the indicator shaft(s) to a terminal; a cap means at the top of the erosion indicator shaft (s)comprises color coded bands for indicating extent of erosion of the contact (s). The system provides a leverage mechanism for indicating the erosion of the contact (s).