Yes, our equipment is built for adaptability. Whether your project involves ACSR, AAAC, or other specialized conductors, our diverse product line of hydraulic pullers, tensioners, and puller-tensioners is designed to handle a wide range of wire diameters and capacities. We also offer various models suitable for different terrains, including flat plains, mountainous regions, and hilly areas, ensuring you have the right tools for any project.

Selecting the right stripping tool is crucial for a clean, damage-free strip. The most common types are:

• Three-hole fiber strippers: These are a must-have for field technicians. Each hole is pre-set to strip a specific layer of the fiber: the outer jacket, the 900-micron buffer, and the 250-micron coating.

• Armored cable slitters/strippers: Designed for tough, heavy-duty cables, these tools can make both longitudinal and circular cuts. They are essential for armored fiber optic cables, such as ADSS, to get through the protective jacket without harming the internal fibers.

• Thermal strippers: These tools use heat to soften the coating, allowing for a clean and precise strip, especially useful for ribbon fibers.

Choosing the right hardware is critical for the safety and longevity of your power line. Key factors to consider include:

• Conductor Type and Size: Different clamps are designed for specific conductor materials (e.g., ACSR, AAAC, AAC) and diameters. Using an improperly sized clamp can lead to conductor damage or failure.

• Application: The purpose of the hardware matters. A dead-end clamp is for terminating a line, while a guy grip is for tensioning a guy wire.

• Environmental Conditions: The hardware must be able to withstand local environmental factors, such as high winds, extreme temperatures, and corrosive elements. Our hot-dip galvanized and aluminum alloy products offer superior durability and corrosion resistance.

• Required Tension: The tension rating of the hardware must meet or exceed the maximum tension of the line. Using a dynamometer is recommended to ensure the tension is set correctly during the stringing process.

For underground cable laying, the process relies heavily on specialized pulling equipment rather than static hardware. Our solutions for this include:

• Hydraulic Cable Pullers and Winches: These are the primary tools used to pull long lengths of heavy underground cables through conduits and trenches. They offer precise control over the pulling force and speed, preventing damage to the cable.

• Conductor Pulling Grips: These are used to securely attach the pulling rope to the cable, ensuring the force is distributed evenly and the cable's jacket is not damaged.

Best practices involve a careful planning process, including calculating the exact pulling tension required for the cable run and monitoring this tension in real-time using tension meters. This ensures the cable is not over-stressed, which could lead to damage or premature failure.

A conductor stringing method statement is a formal document that details the step-by-step procedures, equipment, personnel, and safety precautions required for installing conductors on a power line project. Its importance cannot be overstated:

• Safety: It is the cornerstone of a safe operation, identifying potential hazards and outlining control measures to protect workers and the public. It ensures compliance with international safety standards and regulations.

• Efficiency: It provides a clear, logical sequence for the entire stringing process, from preparatory work to final inspection. This eliminates guesswork, minimizes delays, and ensures the project is completed on time and within budget.

• Quality: The statement specifies the correct use of tools and equipment, such as tensioners, pullers, and stringing blocks, to prevent damage to the conductor. It also defines the precise sagging and tensioning parameters, guaranteeing the long-term integrity and performance of the line.

There are two primary methods for overhead conductor stringing:

• Slack Stringing (or Ground Stringing): This is a traditional method where the conductor is pulled along the ground and then lifted into position. It is typically used for low-voltage distribution lines where terrain and obstacles are not an issue. This method requires a drum stand, a winch, and running-out blocks, but a full puller-tensioner system is not essential.

• Tension Stringing: This is the most common and safest method for high-voltage and extra-high-voltage transmission lines. The conductor is held clear of the ground and obstacles from the drum to the last tower using specialized equipment. This prevents damage to the conductor and the surrounding environment.

Ningbo Changshi is a specialist in tension stringing equipment. Our comprehensive range includes:

• Hydraulic Puller-Tensioners: Designed for precise control over conductor tension.

• Anti-twisting Steel Wire Rope: Prevents damage from torsion during the pull.

• Conductor Running-out Blocks: High-quality, anti-friction blocks to ensure a smooth and efficient pull.

• Reel Stands and Jacks: For the safe and stable management of conductor drums.

• Conductor Grippers, Swivels, and Connectors: To securely link the pulling rope to the conductor.

Safety is our highest priority. A robust safety plan is integral to every stringing operation. Key safety precautions include:

• Pre-installation Safety Checks: A thorough site risk assessment before work begins, checking weather conditions, and inspecting all equipment for defects.

• Grounding and Bonding: Proper grounding of all stringing equipment (pullers, tensioners, reel stands) and towers to prevent electrical hazards from induction or accidental contact with live lines.

• Safe Clearance Distances: Maintaining a safe minimum clearance distance from existing live lines, as defined by local and national regulations.

• Communication: Establishing a reliable communication network (e.g., walkie-talkies) between all personnel on-site, especially between the puller and tensioner operators.

• Personnel Training: Ensuring all workers are trained and certified in safe work practices, fall protection, and emergency procedures.

• Equipment Inspection: Using high-quality, regularly inspected tools and equipment from a trusted manufacturer like Ningbo Changshi.

A typical tension stringing project follows a well-defined sequence:

1. Preparation: Site clearance, access road preparation, and establishing the layout for equipment and conductor drums.

2. Insulator and Block Installation: Installing insulator strings and conductor running-out blocks on all towers within the stringing section.

3. Pilot Wire Stringing: Pulling a small-diameter pilot wire through the running-out blocks.

4. Pulling Rope Installation: Using the pilot wire to pull the larger-diameter pulling rope.

5. Conductor Pulling: The pulling rope is attached to the conductor via a swivel and running board, and the hydraulic puller-tensioner system pulls the conductor through the blocks.

6. Sagging: After the conductor is in place, it is tensioned to achieve the precise sag as per the design specifications.

7. Clamping and Accessories: The conductor is finally clamped to the insulators, and accessories like spacers, dampers, and vibration dampers are installed.

8. Final Inspection: A thorough final check of the entire line to ensure all components are properly installed and secured.

We are confident that with our expertise and high-quality equipment, Ningbo Changshi Electric Power Machinery Manufacturing Limited can be the reliable partner for all your OHTL and underground cable laying needs.