应力锥

A stress cone is a specially shaped component used in high-voltage insulated cable terminations to manage and redistribute electrical stress concentrations at the cable termination point. It functions by gradually tapering the insulation interface to control the electric field gradient, preventing partial discharges and insulation failure. This component is essential for maintaining dielectric integrity in medium to high-voltage applications (typically 1kV to 500kV).

The stress cone operates on the principle of electric field control through geometric shaping. By creating a gradual transition from the cable's conductive core to the surrounding insulation, it reduces the electric field intensity at critical points. This prevents localized stress concentrations that could cause corona discharge, tracking, or insulation breakdown. The conical shape provides a controlled path for electric field lines, ensuring uniform stress distribution across the insulation interface.