NLL Aluminum Alloy Tension Clamp

NLL Series Aluminum Alloy Tension Clamp – Bolted Dead-End for Overhead Lines

NLL series bolted tension clamps are high-strength aluminum alloy dead-end hardware designed for terminating and tensioning aluminum conductors (AAC) and ACSR steel-cored aluminum conductors on 10–35kV overhead transmission and distribution lines. Ideal for strain, angle, and dead-end poles in power distribution networks.

Key Features

• ✅ High Mechanical Strength: 40–100kN MBL(Minimum Breaking Load), grip strength ≥95% of conductor rated strength.

• ✅ Premium Aluminum Alloy Body: Corrosion-resistant, lightweight, compatible with aluminum conductors to avoid electrochemical corrosion.

• ✅ Bolted Design: 2–4 U-bolts (grade 6.8 hot-dip galvanized steel), uniform pressure, no conductor damage.

• ✅ Wide Conductor Range: Fits 1–29mm diameter(16–400mm²) aluminum/ACSR conductors.

• ✅ Tool-Free Installation: Hand-tightenable bolts; no special tools or cutting required.

• ✅ Long Service Life: ≥25 years outdoor durability; anodized finish for coastal/humid environments.

• ✅ Insulation Cover Compatible: Optional NLLZ insulation cover for live-line safety.

• ✅ IEC & GB Compliant: Meets IEC 61284, GB/T 2314 standards.

Applications

• 10–35kV overhead transmission & distribution lines

• Aluminum conductors (AAC) & ACSR steel-cored aluminum conductors

• Strain poles, angle poles, dead-end poles

• Power distribution networks, substation connections

• Aerial bundled conductors (ABC) & insulated aluminum wires

Material

• Body/Keeper: High-strength aluminum alloy (cast)

• U-Bolts/Nuts: Hot-dip galvanized steel (grade 6.8)

• Split Pin: Stainless steel (AISI 304)

• Surface Finish: Anodized aluminum

Standards & Certifications

• CE, RoHS, ISO 9001

• IEC 61284, GB/T 2314, BS, ANSI

Technical Parameters

• Voltage Rating: 10–35 kV

• Line Angle: ≤90° (dead-end)

• Color: Silver (anodized)

• Installation: Bolted, hand-tightened

• Service Life: ≥25 years