Short answer: preformed line fitting models should be selected by conductor type, conductor diameter, strand material, line function, mechanical load and installation position.
| Preformed dead end grip | Used for anchoring conductors or stay wires. Confirm conductor diameter and rated tensile strength. |
|---|---|
| Preformed armor rod | Used to protect conductors near suspension points. Confirm conductor size and rod length. |
| Spiral vibration damper | Used for vibration control on overhead lines. Confirm conductor diameter and span condition. |
| ADSS or OPGW fitting | Used for optical cable lines. Confirm cable diameter, span and hardware set. |
Preformed fittings are highly diameter-sensitive. A small conductor diameter mismatch can make the fitting unusable.