Wedge-type Tension Clamps May Experience Flashover-like Events Under Icing Conditions.

Under severe winter weather conditions, overhead line fittings face significant challenges. Especially during icing, the accumulation of frost on conductors and hardware surfaces alters the local electric field distribution and creepage distance, leading to a series of electrical problems.

For a typical tension fitting like the dead end clamp for abc cable, its structure consists of a housing with wedge-shaped clamps that contacts the conductor, bearing the conductor tension through mechanical clamping force. fungsi dead end clamp is widely made of materials such as aluminum alloy and engineering plastics, and is suitable for tensioning and fixing overhead insulated conductors.

When ice forms and accumulates in the contact area between the clamp dead end conductor and the surface is covered with a layer of water ice, the medium environment undergoes a substantial change. Water ice has a dielectric constant much higher than that of air and may form a conductive liquid film at the melting edge. This film, when accompanied by an electric field, reduces the local insulation level around dead and clamp, causing local discharge or breakdown behavior in the concentrated electric field area. This localized electrical breakdown phenomenon occurring on non-insulators is often described in engineering terminology as flashover-like or partial discharge.