NLY Type Clamp Adjustable
Product Overview
The NLY Type Clamp Adjustable is a specialized strain clamp designed for dead-end gripping of insulated conductors on low and medium voltage overhead lines. Widely recognized in the industry under alternative names including insulated strain clamp, adjustable dead-end grip, this product serves as a critical component in 1 kV to 10 kV insulated overhead lines systems. Steel, hot-dip galvanized. Anti-theft devices available for separate purchase.
Advantages
- “Adjustable clamp body” — accommodates a range of conductor diameters within each model, reducing inventory requirements
- “Insulation-friendly grip” — clamps through the insulation layer without stripping, preserving conductor dielectric properties
- “High slip strength” — tested slip load exceeds conductor rated breaking strength for safe tensioning
- “Weatherproof construction” — aluminum alloy body and UV-resistant components ensure long outdoor service
- “Simple installation” — no special tools or compression equipment required, bolt-type tightening in the field
Technical Parameters
| Model | Applicable Conductor Dia.(mm) | Main Dimensions(mm) | Nominal Failure Load(kN) | Reference Weight(kg) | |||
|---|---|---|---|---|---|---|---|
| C | M | L | L1 | ||||
| NLY-50 | 1×7-9.0-140-GB1200-75 | 72 | 18 | 320 | 230 | 65.1 | 3.4 |
| NLY-120 | 1×19-14.0-155-GB1200-75 | 94 | 24 | 556 | 400 | 167.6 | 8.4 |
| NLY-135 | 1×19-15.0-155-GB1200-75 | 94 | 24 | 556 | 400 | 188.5 | 4.9 |
| NLY-150 | 1×19-16.0-155-GB1200-75 | 104 | 27 | 556 | 400 | 209.5 | 11.0 |
| NLY-165 | 1×37-16.8-155-GB1200-75 | 104 | 27 | 556 | 400 | 230.4 | 12.2 |
| NLY-180 | 1×37-17.5-155-GB1200-75 | 114 | 30 | 610 | 450 | 251.4 | 15.6 |
| NLY-195 | 1×37-18.2-155-GB1200-75 | 114 | 30 | 610 | 460 | 273.3 | 16.2 |
| NLY-265 | 1×37-21.0-1570-GB1200-75 | 128 | 36 | 670 | 440 | 367.0 | 26.6 |
| NLY-100E | 1×19-13.0-1570-GB1200-88 | 88 | 22 | 490 | 300 | 151.0 | 6.3 |
| NLY-125E | 1×19-14.5-1570-GB1200-88 | 94 | 24 | 580 | 380 | 188.0 | 9.1 |
| NLY-150E | 1×19-16.0-1570-GB1200-88 | 104 | 27 | 610 | 400 | 228.0 | 12.0 |
| NLY-180E | 1×19-17.5-1570-GB1200-88 | 114 | 30 | 610 | 420 | 273.0 | 15.6 |
| NLY-240E | 1×19-20.0-1570-GB1200-88 | 128 | 36 | 670 | 440 | 357.0 | 22.6 |
Note: Dimensions may vary slightly based on manufacturing tolerances. Contact our engineering team for custom sizes or special requirements.
Material & Manufacturing
- Material: aluminum alloy body with reinforced composite components
- Secondary components: rubber or composite insulation protection
- 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
- Dead-end gripping of insulated conductors on low and medium voltage overhead lines
- LV and MV insulated overhead line dead-end terminals
- Service drop and pole-to-house conductor connections
- Temporary construction power line tensioning
Frequently Asked Questions
Q: What is the difference between NLY adjustable and fixed types? A: Adjustable NLY models use a bolt mechanism to fit multiple conductor sizes. Fixed-type clamps are sized for specific conductor diameters.
Q: Can NLY clamps be used on bare ACSR? A: NLY is designed for insulated conductors. For bare ACSR, NLL bolt-type or preformed helical grips are recommended.
Q: What is the rated slip strength? A: NLY clamps are tested to achieve slip loads exceeding 95% of conductor breaking strength. Refer to model datasheets for exact values.
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 |