"Cable Drum Braking Systems" and "Tension Control Accessories" are vital for overhead tension stringing and controlled underground cable payout, ensuring a smooth process and preventing costly damage:

• Controlled Payout: Their primary function is to apply a consistent and adjustable back tension to the cable drum as the cable is being pulled. Without this controlled resistance, the drum would free-spin, leading to:

  • Over-spooling: Cable spilling off the drum, leading to tangles, kinks, and potential damage.

  • Loss of Control: Unpredictable cable movement, which is extremely dangerous, especially for heavy conductors or at height.

  • Snagging: Loose cable is far more prone to snagging on ground obstacles.

• Preventing Conductor Damage:

  • Maintaining Minimum Bend Radius: By controlling tension, the accessories prevent the cable from kinking or being subjected to excessively tight bends, which can damage insulation, conductor strands, or optical fibers (in OPGW).

  • Reducing Sag for OHTL: In overhead tension stringing, the OHTLstringingequipment.com/Hydraulic-Conductor-Tensioners.html target='_blank'>Tensioner (which uses a braking system) applies back tension to keep the conductor elevated above ground, preventing it from touching obstacles, roads, or energized lines, thus avoiding abrasion and dangerous conditions.

• Types of Systems and Accessories:

  • Hydraulic Braking Systems: Often integrated into larger Tensioners or specialized drum stands, these provide highly precise and adjustable braking force. They can be electronically controlled for automated tension maintenance.

  • Disc Brakes/Friction Brakes: Manual or semi-automatic brake systems attached to the drum spindle, allowing operators to apply mechanical resistance.

  • Dynamometers (Tension Meters): Crucial accessories that provide real-time measurement of the actual pulling force. Operators use this data to adjust the braking system and ensure the tension stays within the cable's maximum allowable limits (MAPT).

  • Digital Readouts: Modern systems provide clear digital displays of current tension, speed, and length, enabling operators to make informed adjustments.

These accessories are indispensable for achieving a high-quality, damage-free, and safe cable installation, particularly when dealing with large or sensitive conductors.