NXLJ Wedge Type Insulated Strain Clamp
Product Overview
The NXLJ Wedge Type Insulated Strain Clamp is a specialized power line hardware designed for critical hardware component for overhead power line construction, ensuring reliable mechanical and electrical performance. Widely recognized in the industry under alternative names including line fitting, overhead hardware, power fitting, line hardware, this product serves as a critical component in overhead power transmission and distribution systems systems. NXLJ wedge-type insulated strain clamp is suitable for use at the terminal or both ends of tension sections of 10kV and below overhead insulated steel-reinforced aluminum conductors (JKLGYJ), together with insulator strings, to fix and tension the overhead insulated wires.
Advantages
- “Precision manufacturing” — CNC machining and forging processes ensure dimensional accuracy and consistent quality
- “Durable surface treatment” — hot-dip galvanizing per ISO 1461/ASTM A153 provides long-term corrosion protection
- “High mechanical strength” — designed to withstand rated breaking loads with appropriate safety margins
- “Standardized interfaces” — compatible with common insulator, conductor, and support hardware specifications
- “Field-proven reliability” — tested per IEC/GB standards for mechanical and electrical performance
Technical Parameters
| Universal Design Model | Applicable Conductor (Overhead Steel-reinforced Aluminum Conductor) (mm2) | Stripping Length (mm) | Grip Force (kN) | Nominal Failure Load (kN) | Matching Insulation Cover |
|---|---|---|---|---|---|
| NXLJ-1 | 35/6 | 245 | 8.3 | 38.0 | NXLJ-1 |
| 50/8 | 11.0 | ||||
| 70/10 | 15.3 | ||||
| NXLJ-2 | 95/15 | 300 | 23.0 | 50.0 | NXLJ-2 |
| 120/7 | 18.0 | ||||
| 150/8 | 21.4 | ||||
| NXLJ-3 | 185/10 | 320 | 26.6 | 70.0 | NXLJ-3 |
| 240/30 | 49.2 |
Note: Manufactured from high-strength cast aluminum alloy, no magnetic hysteresis loss. Wedge-type structure, easy and reliable installation. ◆ Large arc contact area, conductor not easy to slip, high grip force. Dimensions may vary slightly based on manufacturing tolerances. Contact our engineering team for custom sizes or special requirements.
Material & Manufacturing
- Material: high-quality carbon steel, cast iron, or aluminum alloy
- Secondary components: hot-dip galvanized finish
- Surface treatment: Hot-dip galvanizing in accordance with ISO 1461 / ASTM A153 / IEC 61589, minimum zinc coating thickness 65 μm
- Manufacturing process: Precision forging, casting, or CNC machining of critical dimensions, followed by full galvanizing immersion. Dimensional accuracy controlled within ±0.5 mm tolerance on mounting interfaces
- Quality assurance: Every batch undergoes dimensional inspection, galvanizing thickness testing (magnetic or gravimetric method per ISO 2178), and visual surface examination. Mill test certificates (MTC) available upon request
Application Scope
- Critical hardware component for overhead power line construction, ensuring reliable mechanical and electrical performance
- Overhead transmission and distribution line construction
- Power grid upgrade and renovation projects
- Industrial and utility pole hardware assembly
Frequently Asked Questions
Q: What materials are used? A: Depending on the product type, materials include carbon steel, malleable cast iron, forged steel, cast aluminum alloy, or copper alloy. All components have hot-dip galvanized or equivalent corrosion protection.
Q: Are custom sizes available? A: We offer non-standard sizes and custom specifications for special project requirements. Contact our engineering team with your drawings or specifications.
Q: What quality certifications do you have? A: Products are manufactured under ISO 9001 certified quality management system. Mill test certificates (MTC) and third-party inspection reports are available upon request.
Industry Standards & Compliance
| Standard | Scope |
|---|---|
| IEC 61589 | Galvanizing requirements for overhead line hardware |
| ISO 1461 | Hot-dip galvanized coatings on iron and steel articles |
| ASTM A153 | Zinc coating (hot-dip) on iron and steel hardware |
| GB/T 2314 | General requirements for overhead line fittings |
| GB/T 2317 | Mechanical testing methods for overhead line hardware |
| DL/T 765.2 | Suspension and strain hardware for overhead power lines |