Causes Of Uneven Contact Pressure On The Moving And Stationary Contacts Of A High-voltage Disconnector After Closing.
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The three-phase linkage of the High Voltage Disconnect Switch circuit requires high precision; even a slight misalignment in any one phase linkage device can lead to asymmetrical overall pressure distribution. Errors in the fit between the linkage shaft, connecting rod, and drive mechanism can cause asynchronous phenomena during closing, resulting in one phase contact engaging earlier or later, thus causing uneven pressure on the contact surface after closing. Simultaneously, geometric tolerances and manufacturing deviations of the contact surface itself will also contribute to the overall pressure state.
