Product introduction
The NY aluminum compression tension clamp is a load-bearing compression-type hardware component compliant with Chinese national standards. It is widely used in tower connections, power distribution lines in industrial parks, power lines in the northwestern plateau regions, and substations.
Product Materials
- Body: Steel-aluminum composite structure; aluminum tube made of 6063/L3 industrial-grade pure aluminum with a conductivity of ≥58% IACS
- Steel anchor: Solid forged from high-quality carbon structural steel
- Fasteners: Grade 8.8 hot-dip galvanized carbon steel
- Insulation cover: Silicone rubber
- Customization available for special materials such as copper-aluminum composites
Technical Specifications
|
Model |
Suitable Conductor |
Main dimensions (mm) |
Grip (kN) |
|||||||
|
|
|
L |
L1 |
L2 |
L3 |
D |
D1 |
D2 |
R |
|
|
NY-50/8 |
LGJ-50/8 |
355 |
250 |
55 |
190 |
26 |
12 |
16 |
10 |
16.1 |
|
NY-50/30 |
LGJ-50/30 |
405 |
300 |
55 |
190 |
30 |
14 |
16 |
10 |
40.5 |
|
NY-70/10 |
LGJ-70/10 |
385 |
280 |
55 |
200 |
26 |
12 |
16 |
10 |
22.3 |
|
NY-70/40 |
LGJ-70/40 |
455 |
350 |
55 |
200 |
32 |
18 |
16 |
10 |
55.4 |
|
NY-95/15 |
LGJ-95/15 |
385 |
280 |
55 |
205 |
26 |
14 |
16 |
10 |
33.3 |
|
NY-95/20 |
LGJ-95/20 |
385 |
280 |
55 |
205 |
26 |
14 |
16 |
10 |
35.4 |
|
NY-95/55 |
LGJ-95/55 |
485 |
380 |
55 |
205 |
34 |
20 |
18 |
11 |
74.2 |
|
NY-120/7 |
LGJ-120/7 |
385 |
280 |
55 |
205 |
30 |
12 |
16 |
10 |
26.2 |
|
NY-120/20 |
LGJ-120/20 |
405 |
300 |
55 |
205 |
30 |
14 |
16 |
10 |
39 |
|
NY-120/25 |
LGJ-120/25 |
425 |
320 |
55 |
205 |
30 |
14 |
16 |
10 |
45.5 |
|
NY-120/70 |
LGJ-120/70 |
535 |
420 |
65 |
215 |
36 |
22 |
18 |
11 |
93.5 |
The Features and Structural
◆The aluminum compression tension clamp features high mechanical strength and stable gripping force; it exhibits superior electrical conductivity and a reliable crimping process.
◆Furthermore, it is corrosion-resistant, durable, and highly versatile, featuring a non-reversible installation mechanism.
◆In practical engineering applications-specifically when overhead lines utilize insulated conductors-the NY hydraulic tension clamp can be paired with a specialized insulating cover.
◆This measure serves to prevent potential damage to the conductor's insulation layer caused by friction or compression from the clamp, while simultaneously safeguarding the overall insulation integrity of the line.
Application Scope
1. Transmission Lines: Used for tension and terminal tower connections on 10kV–110kV high-voltage lines, compatible with large-cross-section conductors, and suitable for long-distance, high-tension lines.
2. Distribution Lines: Used for branch anchoring of large-cross-section conductors on 35kV and lower distribution lines in urban, rural, and industrial park areas, meeting the demands of high-load power supply.
3. Special Environments: Lines in the northwestern plateau, northeastern frigid regions, coastal areas, and industrial pollution zones; compatible with standard models such as NY-185/30 and NY-240/30.
4. Other Applications: Line retrofitting and capacity expansion, substation feeders, terminal fixation for power plant transmission lines, as well as anchoring for lightning arresters and guy wires.
Safety Standards
- National Standards: Complies with GB/T 2314-2008, GB/T 765.1-2001, and GB/T 3191-2010.
- Power Industry Standards: Complies with DL/T 757-2021, DL/T 765.2-2004, and DL/T 436-2012.
- Safety Requirements: Grip strength ≥ 95% of the conductor breaking strength; electrical conductivity meets standards with no abnormal heating; protective cover meets safety requirements; crimping has no loose or missing crimps.
FAQ
Q: What is the fundamental difference between the NY aluminum compression tension clamp and the bolt-type or wedge-type clamps?
A: The NY hydraulic-type clamp achieves a separate load-bearing distribution between the steel core and aluminum strands through hydraulic compression. It offers strong gripping force and excellent conductivity, is suitable for large-cross-section conductors, and is non-removable once installed. The bolt-type clamp relies on bolt tightening; while convenient to install, its gripping force is limited, making it suitable only for small-cross-section conductors (≤ LGJ-240/40). The wedge-type clamp utilizes a self-locking wedge mechanism; it is primarily used for lightning protection wires, and its conductive performance is generally moderate.
Q: Why are the steel core and aluminum strands compressed separately when installing an NY aluminum compression tension clamp?
A: The steel core bears the primary tensile load; compressing the steel anchor onto the steel core maximizes the anchoring force. The aluminum strands are responsible for electrical conduction; compressing the aluminum tube onto the aluminum strands ensures minimal contact resistance. This separation of load-bearing functions between the steel and aluminum components prevents mutual interference, thereby simultaneously satisfying the dual requirements of mechanical tension and electrical conductivity.
Q: What tools are required to compress an NY aluminum compression tension clamp, and what are the key procedural requirements?
A: Specialized tools are required, including a dedicated hydraulic press (100–600 tons), matching compression dies, a conductor stripping tool, and a tape measure. Key requirements include: ① Precise stripping length for the conductor, ensuring the steel core and aluminum strands are cleanly separated; ② Correct compression sequence: compress the steel anchor (onto the steel core) first, followed by the aluminum tube (onto the aluminum strands); ③ Proper matching of the compression dies to the clamp model, ensuring the compression pressure meets specifications and the indentation depth complies with standards; ④ Post-compression inspection to verify the absence of cracks or bulges in the exterior appearance, and successful completion of the gripping force test.
Q: Can NY Aluminum Hyraulic Strain clamps be used for all-aluminum stranded conductors (without a steel core) or for steel stranded conductors?
A: No. The NY series is designed specifically for steel-reinforced aluminum stranded conductors (ACSR), utilizing the steel anchor to secure the steel core. All-aluminum stranded conductors (without a steel core) require specialized hydraulic-type tension clamps (such as the NYL series), while steel stranded conductors are compatible with the NE series of explosive-compression or hydraulic tension clamps.
With over 10 years of manufacturing experience, our automated production lines have an annual output of over 500,000 units. We hold all necessary qualifications and certifications; our products are reliable, with end-to-end quality control ensuring a 100% pass rate. We offer strong customization capabilities and a responsive R&D team. As a direct manufacturer, we provide excellent value for money and can supply samples. We offer 24/7 technical support and lifetime maintenance, serving over 500 clients with a satisfaction rate of over 98%, and exporting to multiple countries.
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