Anti-twist swivels are paramount for protecting OPGW (Optical Ground Wire) during installation due to OPGW's sensitive fiber optic core:

• Preventing Torsional Stress: OPGW contains delicate optical fibers that are highly susceptible to damage from twisting. The anti-twist swivel is engineered to absorb and dissipate any rotational forces that can build up in the pulling rope during stringing. This ensures that these torsional stresses are not transferred to the OPGW itself.

• Maintaining Fiber Integrity: By preventing the OPGW cable from twisting along its axis, the swivel safeguards the optical fibers within. Twisting can cause micro-bends, macro-bends, or even breaks in the fibers, leading to signal loss or complete failure of the communication link.

• Smooth Passage: The swivel allows the pulling line and the OPGW to rotate independently, facilitating a much smoother passage of the cable through stringing blocks and over obstacles without snagging or kinking.

• Enhancing Safety: A twisted cable can behave unpredictably, posing a safety risk to crew members. Swivels contribute to a more controlled and predictable stringing operation.

• Optimizing Performance: Ultimately, the use of anti-twist swivels ensures that the OPGW's communication capabilities remain intact and perform optimally after installation, avoiding costly repairs or re-stringing.