Flashover Path Analysis Of Wedge-shaped Tension Clamps On The Surface Of Insulators

Long-term observation of the wedge-type tension clamp and insulator string combination system revealed that when the system is subjected to overvoltage impact, the discharge channel does not develop along the expected air gap, but instead preferentially selects the insulator surface as the main path for penetrating breakdown.

As an anchoring device for tension towers, fixed dead end clamp works closely with the insulator string to bear the tension of the conductor. Under normal operating conditions, the electric field distribution formed by this combination structure is relatively uniform. However, when the ambient humidity increases or dirt adheres to the connection area between the dead end clamp and the insulator, the creepage distance on the insulator surface will be significantly shortened due to the formation of condensation.