Three Sheaves Stringing Block Professional Cable Pulling Equipment
For Power Grid Construction
Core Design Features
- Triple-sheave configuration with 120° angular spacing for
optimal conductor alignment
- Forged alloy steel frame with zinc-nickel alloy coating (50μm
thickness)
- Sealed ball bearings with automatic lubrication ports (IP66
rating)
- Working Load Limit (WLL): 8-32 tons (tested to 4:1 safety
factor per ASME B30.26)
- Conductor compatibility: 12mm-60mm diameter
(ACSR/AAAC/ACCC/TACSR)
- Integrated anti-derailment guards for all sheave grooves
Operational Advantages
✔ 40% faster stringing speed compared to dual-sheave blocks
✔ 3-point contact system prevents conductor twisting during
pulls
✔ Reduced fleet angle (<2°) minimizes conductor surface wear
✔ Quick-change sheave system (tool-free replacement in <5
minutes)
✔ Modular design allows adding grounding rollers as optional
accessories
Safety Certifications
✓ IEEE 524-2020 compliant for conductor installation
✓ OSHA 1910.269 certified for live-line work
✓ EN 13414-1:2020 load testing certification
✓ Non-magnetic stainless steel hardware for substation
environments
✓ Dual-locking swivel hook with 360° rotation capability
Maintenance Specifications
• Self-cleaning sheave grooves with UHMWPE liners (replaceable)
• Magnetic particle inspected load-bearing components
• Corrosion warranty: 5 years in coastal environments (C5-M
class)
• RFID tracking tag embedded in frame for asset management
• 3D-printed spare parts program available
Typical Applications
➔ ±800kV UHV DC line construction
➔ Bundle conductor stringing (4x/6x/8x)
➔ Transposition tower section pulls
➔ Submarine cable landing operations
➔ High-altitude (>3000m) line projects
Optional Accessories
- Fiber-optic cable guide attachments
- Real-time load monitoring system (BLE 5.0)
- Arctic-grade lubricant kit (-50°C rated)
- Explosion-proof version (ATEX Zone 1)
| Item Number | Model | Rated Load (kN) | Weight (kg) | Remark |
| 10226 | SH80S | 5 | 2.8 | Nylon sheave |
