Standard Installation Specification For Wedge-type Tension Clamp Assembly

Publish Time: 08/08 2026 Author: Site Editor Visit: 14

To ensure proper assembly and sufficient mechanical clamping force without damaging the conductor strands or affecting the stability of the overhead power line, the wedge tension clamp must be installed on the insulator string. This includes aligning the U-shaped connector, securing the conductor in the wedge groove, and applying a controlled tension force.

Pre-Assembly Inspection and Preparation

Selecting appropriate hardware requires checking conductor diameter against clamping specifications. Technicians inspect the dead end tension clamp components for surface defects, micro-cracks, or burrs. Cleaning conductor contact surfaces prevents localized resistance, while verifying clevis pin dimensions ensures precise mechanical alignment with the insulator hardware.

Step-by-Step Connection Process

Position the insulator string securely on the crossarm anchor point. Insert the clevis pin through the extension plate and lock it using a stainless steel cotter pin.
Slide the conductor into the body cavity. Insert the self-locking wedges into the channel, ensuring complete contact along the conductor strands.

Mechanical tensioning requires systematic pull-back force to seat the internal wedges. Connecting a dead end clamp with eye hook to tensioning equipment allows controlled pull. As tension increases, the self-tightening wedge mechanism grips the conductor uniformly, maintaining designated mechanical load ratings without slipping.

Final Securing and Inspection Standards

Verify that the wedge depth matches manufacturer specifications and verify that sag tensioning complies with line design parameters.
Install safety retaining clips to prevent accidental pin dislodgement during wind-induced vibration or thermal expansion.

Applying a dead end loop clamp on jumper connections maintains continuous electrical conductivity across the strain structure. Final inspection involves measuring clearance distances, confirming torque values on auxiliary bolts, and documenting visual alignment across the entire insulator string assembly.