NL Pre-Stranded Tension Clamp

NL Pre-Stranded Tension Clamp (also called preformed strain clamp/dead-end grip) is a high-efficiency, bolt-free tensioning hardware designed for overhead transmission & distribution lines. It secures ACSR, AAC, AAAC, or copper conductors to towers/poles, bearing full conductor tension while protecting cables from damage—ideal for 10kV–35kV networks and long-span applications.

Key Features

• ✅ Preformed Helical Design: Even stress distribution, no conductor crushing or abrasion

• ✅ High Holding Strength: Up to 95% of conductor rated breaking load, vibration-resistant

• ✅ Bolt-Free Installation: No tools or torque wrenches; fast field application

• ✅ Corrosion-Resistant: Hot-dip galvanized steel or aluminum alloy for 25 year service life

• ✅ Color-Coded Sizing: Quick model identification (green/brown/yellow/blue)

• ✅ Wide Compatibility: Fits ACSR, aluminum, and steel-reinforced conductors

• ✅ Cost-Effective: Reusable design; lower installation/maintenance cost than bolted clamps

Technical Specifications

• Model: NL-25/G, NL-35/G, NL-50/G, NL-70/G, NL-95/G, NL-120/G, NL-150/G, NL-185/G
• Material:
• Helical Strands: High-carbon steel, hot-dip galvanized
• End Fitting: Aluminum alloy or galvanized steel
• Thimble: Galvanized steel (reinforced eye)
• Conductor Range (Diameter):
• NL-25/G: 6.6 mm
• NL-35/G: 7.65–7.95 mm
• NL-50/G: 8.95–9.30 mm
• NL-70/G: 10.82–11.10 mm
• NL-95/G: 12.5 mm
• Rated Voltage: 10kV–35kV (distribution & transmission)
• Breaking Strength: 40–120 kN (model-dependent)
• Working Temperature: -40°C to 85°C
• Standards: GB/T 2314, DL/T 759, IEC 61238, ISO 9001
• Finish: Hot-dip galvanized (zinc ≥85 μm) or aluminum alloy
• Weight: 0.2–2.0 kg (per set)

Applications

• Overhead line dead-end tensioning (10kV–35kV)

• ACSR, AAC, AAAC, and copper conductor termination

• Pole/tower mounting for distribution networks

• Long-span river crossings and mountainous terrain lines

• ADSS/OPGW optical cable tensioning (span ≤100m, angle <25°)

 Product Specifications (Shopify Block)

• Product Name: NL Pre-Stranded Tension Clamp / Preformed Strain Clamp

• Model: NL-25/G, NL-35/G, NL-50/G, NL-70/G, NL-95/G, NL-120/G, NL-150/G, NL-185/G

• Material: Galvanized Steel Strands, Aluminum Alloy End Fitting

• Type: Preformed Helical Dead-End Grip

• Conductor Fit: ACSR, AAC, AAAC, Copper, Steel Ground Wire (GJ)

• Voltage Rating: 10kV–35kV

• Standard: GB/T 2314, DL/T 759, IEC 61238

• Feature: Bolt-Free Install, High Holding Strength, Corrosion-Resistant

• Application: Overhead Transmission & Distribution Lines, Dead-End Termination

Tags / Keywords

NL pre-stranded tension clamp, preformed strain clamp, dead-end grip, helical tension clamp, ACSR dead end, NL-35/G, NL-50/G, bolt-free line clamp, power line hardware, overhead line fitting

 Collection / Category

• Main Category: Power Line Hardware

• Subcategory: Tensioning & Dead-End Fittings

• Optional: Preformed Hardware, Distribution Line Fittings