Application Of Metal-type Wedge-shaped Tension Clamps With Wedge Cores In Bare Conductors
Wedge-type tension clamp components secure overhead lines efficiently. The inner wedge core plays a critical role in anchoring bare conductors without damaging the material. Selecting the correct specifications ensures optimal mechanical gripping and electrical continuity in power distribution networks.
Definition and Function
A wedge-type tension clamp relies on a mechanical advantage to secure overhead lines. As tension increases on the bare conductor, the internal wedge slides deeper into the tapered body. This action increases the compressive force, preventing slippage under severe weather conditions.
Mechanical Gripping Mechanism
The dual-wedge design distributes clamping pressure evenly along the conductor surface. This mechanical configuration prevents localized stress concentration, which safeguards individual wire strands from fatigue failure during long-term tension.
Materials and Durability
High-strength aluminum alloys and hot-dip galvanized steel compose these components. The materials provide excellent corrosion resistance, ensuring a service life exceeding 30 years in harsh industrial or coastal environments.
Component Specifications and Engineering Selection
Engineers must match the clamp dimensions with the specific diameter of the bare conductor. Incorrect sizing leads to inadequate tensile strength or structural damage to the electrical lines.
| Conductor Diameter Range (mm) | Rated Tensile Strength (kN) | Tightening Torque (Nm) |
|---|---|---|
| 7.0 - 10.5 | 25 | 40 |
| 11.0 - 14.5 | 45 | 50 |
| 15.0 - 19.0 | 70 | 60 |
Comprehensive Application Across Cable Networks
While primarily engineered for bare overhead wires, specific variations adapt to insulated cable systems to maintain grid stability.
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Bare Conductor Anchoring: The primary application involves ACSR and AAC conductors on distribution lines.
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Standard Dead End Clamp Installation: Used at terminal poles to absorb the full longitudinal tension of the line section.
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Low Voltage Distribution: Integrates as an abc dead end clamp to support insulated service drops.
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Main Line Termination: Functions as a dead end clamp for ab cable networks to secure main distribution pathways.
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Aerial Bundle Solutions: Serves as an ab cable dead end clamp in modern urban retrofits.
Verification and Quality Compliance
Installation quality can be verified by performing routine pull-out tests and resistance measurements, and proper alignment during initial wedge insertion can prevent common field installation errors.
