FDJ Fully Insulated Grounding Device
Product Overview
The FDJ Fully Insulated Grounding Device is a specialized power line hardware designed for critical hardware component for overhead power line construction, ensuring reliable mechanical and electrical performance. Widely recognized in the industry under alternative names including line fitting, overhead hardware, power fitting, line hardware, this product serves as a critical component in overhead power transmission and distribution systems systems. The anti-back feed protection device is suitable for 1kV and below low-voltage insulated distribution lines at both sides of tie switches, branch poles, tension pole joints and possible back feed branch line points (or branch lines with three-phase power meters) where grounding protection points should be set for power-off work. 1. Installing the anti-back feed device not only facilitates the maintenance and emergency repair work of low-voltage lines, but also avoids the trouble of repeatedly stripping and wrapping wires when installing grounding wires each time. At the same time, it prevents erroneous operations such as self-generated power feeding back to the grid or false switching, which could cause personal injury accidents. It also standardizes the safe grounding method for low-voltage lines, prevents unnecessary accidents caused by random grounding, and greatly improves the safety factor.
Advantages
- “Precision manufacturing” — CNC machining and forging processes ensure dimensional accuracy and consistent quality
- “Durable surface treatment” — hot-dip galvanizing per ISO 1461/ASTM A153 provides long-term corrosion protection
- “High mechanical strength” — designed to withstand rated breaking loads with appropriate safety margins
- “Standardized interfaces” — compatible with common insulator, conductor, and support hardware specifications
- “Field-proven reliability” — tested per IEC/GB standards for mechanical and electrical performance
Technical Parameters
| Model | Applicable Conductor (mm2) |
|---|---|
| FDJ-16~150 | 16~150/1kV |
| FDJ-150~300 | 150~300/1kV |
Note: Dimensions may vary slightly based on manufacturing tolerances. Contact our engineering team for custom sizes or special requirements.
Material & Manufacturing
- Material: high-quality carbon steel, cast iron, or aluminum alloy
- Secondary components: hot-dip galvanized finish
- Surface treatment: Hot-dip galvanizing in accordance with ISO 1461 / ASTM A153 / IEC 61589, minimum zinc coating thickness 65 μm
- Manufacturing process: Precision forging, casting, or CNC machining of critical dimensions, followed by full galvanizing immersion. Dimensional accuracy 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. Mill test certificates (MTC) available upon request
Application Scope
- Critical hardware component for overhead power line construction, ensuring reliable mechanical and electrical performance
- Overhead transmission and distribution line construction
- Power grid upgrade and renovation projects
- Industrial and utility pole hardware assembly
Frequently Asked Questions
Q: What materials are used? A: Depending on the product type, materials include carbon steel, malleable cast iron, forged steel, cast aluminum alloy, or copper alloy. All components have hot-dip galvanized or equivalent corrosion protection.
Q: Are custom sizes available? A: We offer non-standard sizes and custom specifications for special project requirements. Contact our engineering team with your drawings or specifications.
Q: What quality certifications do you have? A: Products are manufactured under ISO 9001 certified quality management system. Mill test certificates (MTC) and third-party inspection reports are available 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 |