BD Type Overhead Ground Wire Suspension Hanger
Product Overview
BD Type Suspension Hanger is a specialized pole-mounted hardware designed to support and suspend overhead ground wire (also known as earth wire, shield wire, or static wire) on tapered reinforced concrete (RC) poles. As a critical component in transmission line grounding systems, it secures the ground wire at a specified distance from the pole surface, maintaining proper clearance and sag control.
Each BD model corresponds to a specific pole diameter, ensuring precise fitment and stable mechanical performance. Available in four configurations covering pole diameters from φ190 to φ400, the BD series meets the requirements of medium-voltage (MV) and high-voltage (HV) distribution and sub-transmission lines up to 66 kV.
Advantages
- Precise pole matching — four models designed for tapered RC pole diameters φ190, φ230, φ300, and φ400, eliminating field adaptation and ensuring structural integrity
- Stable suspension geometry — maintains consistent ground wire clearance from the pole surface, reducing vibration-induced fatigue and electromagnetic interference risks
- Durable galvanized finish — hot-dip galvanized carbon steel construction conforming to ISO 1461 and ASTM A153 standards, delivering 15+ years of corrosion resistance in outdoor environments
- Lightweight yet robust — optimized cross-sectional design achieves high load-bearing capacity with minimal added weight to the pole structure
- Quick bolt-on installation — standardized M-series bolt connection (M18–M27) allows fast field assembly without special tools or welding
Technical Parameters
| Model | Applicable Range | Main Dimensions (mm) | Reference Weight (kg) | |||
|---|---|---|---|---|---|---|
| Φ | b | M | L | |||
| BD-1839 | φ190 Tapered RC Pole | 20 | 18 | 18 | 390 | 4.26 |
| BD-2244 | φ230 Tapered RC Pole | 20 | 18 | 22 | 440 | 4.77 |
| BD-2451 | φ300 Tapered RC Pole | 20 | 18 | 24 | 510 | 5.25 |
| BD-2762 | φ400 Tapered RC Pole | 20 | 18 | 27 | 620 | 7.10 |
Note: Hot-dip galvanized steel parts. Dimensions may vary slightly based on manufacturing tolerances. Contact our engineering team for custom sizes or non-standard pole diameters.
Material & Manufacturing
- Material: High-quality carbon steel (Q235 or Q345 per GB/T 700), selected for excellent weldability, machinability, and mechanical strength
- Surface treatment: Hot-dip galvanizing in accordance with ISO 1461 / ASTM A153 / IEC 61589, minimum zinc coating thickness 65 μm, ensuring long-term protection against atmospheric and soil corrosion
- Manufacturing process: Precision forging and CNC machining of critical dimensions, followed by full galvanizing immersion — dimensional accuracy is strictly controlled within ±0.5 mm tolerance on mounting interfaces
- Quality assurance: Every batch undergoes dimensional inspection, galvanizing thickness testing (magnetic or gravimetric method per ISO 2178), and visual surface examination before shipment. Mill test certificates (MTC) are available upon request
Application Scope
BD Type Suspension Hangers are widely deployed in:
- Overhead distribution and sub-transmission lines (11 kV – 66 kV) for ground wire / earth wire / static wire suspension on tapered concrete poles
- Urban and rural power grid construction where shield wire protection against lightning is required
- Railway electrification catenary support structures requiring overhead ground wire installation
- Renewable energy collector lines and substation approach spans where grounding conductor suspension is needed
Frequently Asked Questions
Q: Can BD hangers be used on steel poles or wooden poles? A: BD series is specifically designed for tapered reinforced concrete poles. For steel tubular poles or wooden poles, alternative mounting brackets or custom adapters are recommended. Contact us with your pole specifications for a tailored solution.
Q: What wire sizes are compatible with the BD hanger? A: BD hangers support standard ground wire sizes including GSW (Galvanized Steel Wire) 7/3.0, 7/3.5, and OPGW (Optical Ground Wire) with outer diameters up to 17 mm. For larger earth wire, consult our engineering team.
Q: Are these hangers suitable for coastal or high-corrosion environments? A: Standard hot-dip galvanized units perform well in most atmospheric conditions. For severe marine or industrial environments, we can provide extra-thick galvanizing (≥86 μm) or zinc-aluminum alloy coating upon request.
Industry Standards & Compliance
| Standard | Scope |
|---|---|
| IEC 61589 | Galvanizing requirements for overhead line hardware |
| ISO 1461 | Hot-dip galvanized coatings on iron and steel articles |
| ASTM A153 | Zinc coating (hot-dip) on iron and steel hardware |
| GB/T 2314 | General requirements for overhead line fittings |
| GB/T 2317 | Mechanical testing methods for overhead line hardware |
| DL/T 765.2 | Suspension and strain hardware for overhead power lines |