High-Voltage Grounding Wire

Core Functions

1. Discharge residual charge: Quickly release leftover electrical charge in de-energized equipment (e.g., transformers, cables) to avoid electric shocks.
2. Eliminate induced voltage: Prevent harm from induced voltage generated by adjacent live lines on de-energized circuits.
3. Prevent accidental re-energization: Create a short-circuit loop via forced grounding—if power is mistakenly restored, protective devices will trip immediately.
4. Lightning protection: Provide a low-impedance path for lightning current to discharge into the ground during thunderstorms.

Structural Components (in the pictured set)

• Insulated operating rods:
  Made of epoxy resin (green body) for high insulation and strength; the top features a metal clamp (double-spring hook/buckle type) to secure live conductors.
• Grounding flexible copper wire:
  Stranded with high-quality multi-core copper (coated with an insulating sheath to resist wear), usually 25mm² (for 10kV systems) or 35mm² (for 35kV systems), responsible for conducting current.
• Grounding electrode (earth pin):
  Metal-made, requiring insertion into the ground (≥0.6 meters deep) to direct electrical charge into the earth.

Application Scenarios & Classification

• By voltage level: Common types include 10kV, 35kV, 110kV, etc. (the set in the picture typically fits 10kV systems, with ~1m-long operating rods).
• By usage environment:
  • Outdoor line type (the type in the picture): For maintenance of overhead transmission lines.
  • Indoor busbar type: For maintenance of switchgear and busbars in substations.

Usage Specifications

1. Installation order: Connect the grounding electrode first, then the conductor end of the equipment.
2. Removal order: Disconnect the equipment’s conductor end first, then the grounding electrode.
3. Precautions:
   • Ensure the voltage level of the grounding wire matches the equipment.
   • Inspect clamps, copper wires (for damage), and insulated rods (for integrity) before use.