The Structural Components Of A Wedge-shaped Tension Clamp: Why It Does Not Contain A Piercing Blade?

In the selection of electrical fittings, confusion regarding the structural characteristics of different types of clamps is a common problem on engineering sites. Although dead end clamp for abc cable clamps and piercing insulation clamps both belong to the clamp category in appearance, they differ fundamentally in their structural principles and cannot be substituted for each other, much less used interchangeably.

The Core Working Principle of Wedge-Type Tension Clamps

fungsi dead end clamp clamps are designed based on the "wedge" principle, achieving conductor locking through the mechanical engagement between the wedge core and the housing. During installation, the conductor is placed into the C-shaped housing along with the wedge core. Under pressure, the wedge core moves along the inner wall of the housing towards the outlet, creating a self-locking effect of "tightening with tension." The entire locking process relies on the combination of friction and deformation; the conductor insulation layer is not pierced or damaged during this process. This mechanical logic fundamentally determines that there is no piercing blade in clamp dead end.

The piercing blade is a specialized structure for another type of clamp.

The piercing blade is the core component of the insulation piercing clamp. Its design purpose is to achieve electrical connection by piercing the insulation layer with its serrated edges without stripping the insulation. It is a dedicated structure for T-type connection scenarios. The dead and clamp clamp is responsible for tension fixing at the end of overhead lines or in tension sections, and is unrelated to conductive connections. Therefore, its internal components only include the shell, wedge core, and auxiliary connectors:

• Shell: Made of high-strength die-cast aluminum alloy, C-shaped opening structure, no hysteresis loss;

• Wedge core: Made of insulating reinforced engineering plastic, weather-resistant, power frequency withstand voltage ≥45kV;

• Auxiliary connectors: Hanging plates or hanging rings, used for connection with tension insulator strings.

These three components work together without damaging the conductor insulation layer. The piercing blade is unnecessary and has no installation location in this structural system.

In actual engineering selection, clarifying the structural boundaries of dead clamp is the fundamental prerequisite for correctly matching hardware specifications and ensuring the long-term stable operation of the line.