The Impact Of Non-compliant Installation Techniques On High-voltage Disconnect Switches

When the installation process of high voltage isolator does not meet the requirements, the geometric arrangement of the insulation support may deviate from the nominal value, resulting in insufficient phase-to-phase and phase-to-ground spacing. Such deviations can easily lead to localized corona discharge or even flashover under high voltage. Uneven foundations or missing accessories are common construction quality problems, and the risks only become apparent after the equipment is put into operation.

Similar problems may also manifest in the contact fit and mechanical linkage precision. If the assembly gap between the contact blade and the stationary contact of high voltage isolator switch is too large or the angle is misaligned, it will increase contact resistance, accelerate the formation of thermal defects, and even cause contact erosion.