Nll-Type Strain Clamp for Overhead Electric Porcelain Transmission Line

The NLL-Type Strain Clamp is designed for terminating and tensioning conductors on overhead porcelain transmission lines. Made from high-strength aluminum alloy, it provides excellent mechanical grip, corrosion resistance, and long-term stability. The clamp ensures secure conductor anchoring at dead-end points while maintaining reliable electrical performance in LV and MV distribution networks.

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Product Description

Nll-Type Strain Clamp for Overhead Electric Transmission Line

The NLL-Type Strain Clamp is designed for terminating and tensioning conductors on overhead porcelain transmission lines. Made from high-strength aluminum alloy, it provides excellent mechanical grip, corrosion resistance, and long-term stability. The clamp ensures secure conductor anchoring at dead-end points while maintaining reliable electrical performance in LV and MV distribution networks.All REACON spool insulators are manufactured from wet process porcelain to ensure a lifetime of trouble free performance. They are designed, manufactured and tested to the requirements of ANSI Standard C29.3. Standard color is sky gray, with brown or white available upon request.

Product Advantages:

• High-strength aluminum alloy body for strong tension capacity

• Uniform grip to prevent conductor slippage

• Corrosion-resistant surface suitable for outdoor lines

• Simple installation without damaging conductor strands

• Applicable to porcelain-insulated and standard overhead lines

• Stable mechanical and electrical performance over long service life

Application Scenarios：

Porcelain-Insulated Overhead Transmission Lines：Installed at dead-end poles to anchor conductors and maintain proper tension.
Distribution Line Dead-End Sections：Used at line ends or angle structures to support mechanical load from conductor tension.
LV/MV Overhead Networks：Provides conductor termination for 1kV–33kV distribution systems.
Rural Power Expansion Projects：Ensures stable anchoring of new spans during network upgrades.
Mountainous or Long-Span Installations：Provides strong mechanical holding force to cope with long spans and terrain changes.

Quality Assurance:

Each clamp is tested for tensile strength, slip resistance, mechanical reliability, and corrosion performance according to ASTM standards.

FAQ:

Q1: Does it fit multiple conductor sizes?

A1:Yes, various models are available for different conductor diameters.

Q2: Is installation tool-free?

A2: Only simple tools are needed; no conductor damage.

Q3: Can it be used on both porcelain and composite systems?

A3:Yes, it is compatible with both types of overhead structures.

Features:

1.In comply with ANSI, IEC, BS, AS etc standard
2.Brown or grey glazed

3.The material is porcelain

Parameter：

Spool type insulators
ANSI Class		53-1	53-2	53-3	53-4	53-5
Dimensions
Diameter	mm	57	79	76	105	102
Height	mm	54	76	81	76	105
Mechanical Values
Tensile Strength	kn	9.1	13.6	18.2	20.5	27.3
Electrical Values
Low frequency dry flashover voltage	kv	20	25	25	25	35
Low frequency wet flashover voltage,vertical	kv	8	12	12	12	18
Low frequency wet flashover voltage,horizontal	kv	10	15	15	15	26
Packing and Shipping Data
Net weight,approximate	kg	0.22	0.55	0.60	1.15	1.20