Safe Distance Between High-Voltage Busbars
The design of safe distances between high-voltage busbars is critical to ensuring equipment performance and operational safety. It requires consideration of voltage levels, environmental conditions, and manufacturing processes, adherence to relevant standards, and optimization through simulation and testing. Proper spacing enhances efficiency, minimizes risks, and ensures system stability.
Key Factors Affecting Safe Distances
1. Voltage Levels
Safe distance is proportional to voltage; higher voltages require greater distances.
Typical values:
≤1kV: 10–30mm
10kV: 80–100mm
35kV: 250–300mm
2. Environmental Conditions
Humidity and Pollution: Increase the risk of arcing, requiring greater distances.
Altitude: Higher altitudes lower air density and insulation performance, necessitating adjustments.
3. Electric Field Distribution
Avoid sharp edges to minimize localized electric field intensity; rounded or chamfered edges are recommended.
4. Busbar Structure and Installation
Parallel Arrangement: Requires more spacing to reduce electromagnetic interference.
Insulation Coating: Enables reduced distances but must meet breakdown voltage and heat resistance requirements.
Practical Considerations in Busbar Manufacturing
Insulation Treatment
High-temperature materials (e.g., polyimide film, composite coatings) reduce spacing needs while enhancing insulation.
Layout Optimization
Minimize unnecessary bends and crossings; use parallel arrangements or layered spacers for high-voltage systems.
Grounding Design
Reliable grounding reduces short-circuit risks and allows for optimized spacing.
Precision Manufacturing
High-accuracy punching and welding improve dimensional consistency, ensuring adherence to design specifications.