Design & Mechanism

The weights are dog‑bone shaped and arranged symmetrically at a 45‑degree angle, creating torsional motion that converts vibration energy into heat dissipated into the air. The smooth, void‑free weight design prevents water and ice accumulation. The symmetrical slope between weights generates multiple resonant frequencies, effectively absorbing a broad range of vibrations and reducing conductor fatigue. The clamp uses bolted fastening for reliable grip. Common models include FDN‑2/3, FDN‑3/4, FDN‑4/5, and FDN‑4/6.

Quality Control

Each weight pair is weighed and matched to ensure symmetry. The steel strand is pre‑tensioned and riveted to the weights with confirmed joint strength. The aluminium clamp's contact surface is radiused to avoid conductor damage. Every assembled damper is tested for resonant frequency to verify multi‑frequency performance. Our factory is ISO and high‑tech certified.

Customization & Ordering

We recommend the correct model based on your conductor diameter and span data. Standard models are available from stock for 7‑day delivery; custom orders take about 2 weeks. Mixed orders are accepted.

Packing & After Sales

Export packing uses anti‑rust film and cartons. We offer flexible trade terms and multi‑currency payment. A one‑year global warranty is provided, with 24‑hour after‑sales support.

Product Specifications

Parameter	Details
Product Name	FDN Symmetrical Torsional Vibration Damper
Category	Protective Fittings
Material	Galvanized cast‑iron weights, hot‑dip steel strand, aluminium alloy clamp, stainless steel bolts
Design	Dog‑bone weights at 45° symmetry; multi‑frequency damping
Common Models	FDN‑2/3, FDN‑3/4, FDN‑4/5, FDN‑4/6
Application	Conductor and ground wire vibration protection for high‑voltage lines
Lead Time	Stock: 7 days; Custom: ~2 weeks
Warranty	1‑year global warranty