Hook Grounding Pulley Block For Overhead Transmission Line Stringing Maintenance
A Hook Grounding Pulley Block is a specialized tool used in overhead transmission line construction and maintenance to support and guide grounding cables or earth wires while providing a secure mechanical connection with grounding capability.
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A Hook Grounding Pulley Block is a specialized tool used in overhead transmission line construction and maintenance to support and guide grounding cables or earth wires while providing a secure mechanical connection with grounding capability.
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It is primarily used to eliminate faradism (inductive interference) in conductors and grounding wires during stringing operations by providing a grounded path for the cable.
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The pulley block is typically mounted on the outlet side of the tensioner and the inlet side of the puller during conductor or earth wire stringing.
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It guides the grounding cable smoothly over the sheave while maintaining electrical continuity to ground, preventing buildup of induced voltages.
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The frame is usually made of galvanized steel for durability and corrosion resistance.
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The sheave (pulley wheel) runs on ball bearings for smooth rotation and reduced friction.
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The block is equipped with a hook attachment (swivel hook or clevis hook) for easy hanging on structures or stringing equipment.
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Some models include a grounding device with an insulated copper cable and grounding clamp to ensure proper earthing during operations.
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Weight typically ranges from about 4.6 kg to over 14 kg depending on size and capacity.
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Working load capacities vary, with common ratings around 23 kN (approximately 2.3 tons) or higher for heavy-duty models.
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Used in overhead line stringing for both conductors and earth wires.
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Provides a safe and reliable grounding point while allowing cable movement.
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Helps maintain the integrity of the grounding system during tensioning and pulling.
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Suitable for use on transmission towers, poles, and stringing equipment.
| Feature | Description |
|---|---|
| Purpose | Guide and ground cables during stringing |
| Material | Galvanized steel frame and sheave |
| Sheave | Ball-bearing pulley for smooth cable movement |
| Attachment | Hook or swivel hook for easy mounting |
| Grounding Device | Optional insulated copper cable and clamp |
| Working Load | Typically around 23 kN or higher |
| Weight | 4.6 kg to 14+ kg depending on model |
| Usage | Mounted between tensioner and puller in stringing operations |
In essence, a Hook Grounding Pulley Block is an essential overhead line stringing tool that combines mechanical support and electrical grounding to ensure safe, efficient, and interference-free conductor and earth wire installation
