Product Introduction
● The NLD Bolt Strain Clamp is a bolt-type inverted strain clamp, mainly used for 10kV and below distribution networks.
● It is made of malleable cast iron and secured with a U-shaped bolt, anchoring small and medium cross-section conductors through friction, and is the mainstream fixing hardware for distribution network strain towers.
Technical Specifications
| Model | Applicable wire diameter range (including wrapping material)(mm) | Main dimension (mm) | U type bolt | Nominal breaking load(kN) | Reference weight(kg) | |||||
| M | C | L1 | L2 | R | Quantity | Diameter(mm) | ||||
| NLD-1 | Φ5.0 ~ 10.0 | 16 | 18 | 150 | 120 | 6.5 | 2 | 12 | 20 | 1.3 |
| NLD-2 | Φ10.1 ~ 14.0 | 16 | 18 | 205 | 130 | 8 | 3 | 12 | 40 | 2.1 |
| NLD-3 | Φ14.1 ~ 18.0 | 18 | 22 | 310 | 160 | 11 | 4 | 16 | 70 | 4.6 |
| NLD-4 | Φ18.1 ~ 23.0 | 18 | 25 | 410 | 220 | 12.5 | 4or5 | 16 | 90/100 | 7.0/7.1 |
Product Advantages
◆ The NLD bolt-type tension clamp is a standard-compliant, universal load-bearing connection fitting primarily used for the terminal fixation, angle connections, and branch anchoring of aluminum stranded wire and steel-core aluminum stranded wire in overhead power lines. Thanks to the convenience of bolt fastening and its stable mechanical properties, it is widely used in various distribution and transmission lines to bear the full tension of the conductors.
◆ Its key advantages include a compact design, sufficient gripping force, and efficient installation, effectively balancing line loads and ensuring the safe and stable operation of the line.
Application Scope
Distribution lines: Mainly used for overhead distribution lines of 10kV and below, it is one of the most common strain fittings in distribution systems.
Small and medium cross-section conductors: Suitable for steel core aluminum stranded wire or aluminum stranded wire up to LGJ-240, not suitable for large cross-section conductors (large cross-sections require compression-type strain clamps).
Specific optical cables: Some models (such as NLD-3) are also suitable for ADSS optical cables, used for lines with spans ≤100 meters and angles <25°.
Quality Verification
We sell directly from the manufacturer. If you have any questions, please contact us.
Related Products
Supporting installation U-shaped hooks, UB hangers, PD connecting plates, ball head hooks, bowl head hangers, and other connecting hardware, as well as insulating covers/tension insulating covers for achieving insulation protection.
Transportation and Packaging
● Packaging Method: Usually packaged in wooden or cardboard boxes, with foam or pearl cotton inside for cushioning to prevent collision.
● Protection Requirements: All galvanized parts must be clean and dry to prevent moisture and rust. The exterior of the packaging box should be marked with the model, quantity, and "Moisture-proof" label.
● Quality Assurance: Products are strictly designed, manufactured and inspected according to national standards GB/T 2314, GB 2320, etc., with quality certificates provided
● Customization Service: Non-standard product customization services available according to customer special requirements
● Technical Support: Provide 24-hour technical consultation services, assist in solving technical problems in selection, installation and use
● Product processing, packaging and transportation location and other issuesneed to be communicated in advance to avoid impact.
FAQ
Q: What types of conductors and voltage ratings are compatible with NLD cable clamps?
A: Compatible with aluminum stranded wire (LJ) and steel-core aluminum stranded wire (LGJ); standard models are compatible with 1 kV, 10 kV, and 20 kV, while custom models can be compatible with voltage ratings up to 35 kV.
Q: What is the core material of the NLD line clamp, and what are its advantages?
A: The body is made of highly conductive aluminum alloy (conductivity ≥58% IACS), offering excellent corrosion resistance and electrical conductivity; the fasteners are made of Grade 8.8 hot-dip galvanized carbon steel, providing anti-loosening and anti-rust properties; copper-aluminum composite and stainless steel materials are available upon request.
Q: Can the NLD line clamp be repeatedly disassembled and reused?
A: Yes, it is removable and reusable, facilitating line maintenance, retrofitting, and capacity expansion, with no risk of thermal damage to the conductor.
Q: What are the common causes of heat generation in NLD line clamps during operation?
A: The main causes include mismatch between the model and the conductor, insufficient bolt torque, incomplete removal of the conductor's oxide layer, lack of conductive grease, and loose fasteners.
Hot Tags: bolt strain clamp, China bolt strain clamp manufacturers, suppliers, factory, Aluminum Alloy House Tension Clamp, Electrical Aluminum Tension Clamp, Anchor Tension Clamp Aluminum, aluminum alloy cable tension accessory, Aluminium Wedge Grip Tension Clamp, 4 core cable tension clamp
