Triple-Sheave Bundled Conductor Stringing Block | Three-Wheel Pulley for Transmission Line Construction

1. Overview

The Triple-Sheave Bundled Conductor Stringing Block is designed for guiding and supporting bundled conductors during overhead transmission line construction.
Equipped with three large-diameter sheaves, the block ensures smooth conductor passage, reduced friction, and stable performance in medium- to high-voltage stringing operations.

It is ideal for double or triple bundled ACSR, AAAC, and ACCC conductors.

2. Product Definition

A stringing block is a rotating sheave device used to guide conductors during installation.
This model features:

• Three independent sheaves

• A reinforced frame

• Compatibility with various bundles and conductor sizes

Commonly used with hydraulic pullers, tensioners, and pilot rope systems in transmission line projects.

3. Key Features

• Triple-Sheave Configuration

Supports double- or triple-bundled conductors and ensures stable guiding through each phase of the stringing process.

• Heavy-Duty Frame Structure

Designed for long-span, high-tension, and demanding field environments.

• Low-Friction Bearings

Provides smooth rotation, reduces pulling force, and improves construction efficiency.

• Multiple Sheave Material Options

Aluminum, nylon, or rubber-lined grooves to match conductor protection requirements.

• Customizable Groove Size

Groove diameter, width, and spacing can be tailored to fit conductor bundle specifications.

4. Advantages

• Protects Conductor Surface

Reduced friction and optimized groove shape minimize scratches and bending stress.

• Reliable for High-Voltage Line Projects

Commonly used in 110kV, 220kV, 330kV, and 500kV transmission lines.

• Suitable for Bundled Conductor Configurations

Efficient for 2-bundle and 3-bundle configurations depending on project design.

• Long Service Life

Sealed bearings and durable frame ensure consistent performance in field conditions.

• Highly Compatible

Works with standard line construction equipment and accessories.

Specification:

Single Wheel-Wheel material aluminum or Nylon, and it could be covered by rubber.

Three Wheels-The pulleys are suitable for string two or three bundled conductor lines.

Five Wheels-The pulleys are suitable for string four bundled conductor lines.

6. Applications

Suitable for:

• Bundled conductor stringing for overhead transmission lines

• Double or triple bundle ACSR / AAAC / ACCC installations

• Tower-to-tower conductor guiding

• Long-span, mountain, or high-tension projects

• Use with pilot rope, pullers, tensioners, and swivels

7. FAQ

Q1: Can the sheaves be customized for different conductor sizes?
Yes, groove width, diameter, and spacing can be customized.

Q2: What conductor types are supported?
ACSR, AAAC, ACCC, and OPGW (upon request).

Q3: Is grounding protection available?
Yes, grounding rollers and anti-vibration accessories are optional.

Q4: What is the typical working load?
Standard models range from 30 to 80 kN.
Higher-capacity versions can be provided.

Q5: Do you offer complete stringing equipment?
Yes, full sets including tensioners, pullers, pilot ropes, rollers, and swivels.