ZDVolt’s HVDC wall bushings are specifically engineered for high-voltage direct current transmission systems. These specialized bushings serve as critical interface components in HVDC converter stations, providing reliable insulation between indoor valve halls and outdoor switchyards.

Our HVDC bushings incorporate advanced condenser core design optimized for DC stress distribution, with special attention to the unique challenges of DC voltage including space charge accumulation and polarity reversal effects.

Key Specifications

• DC electric stress and surface leakage current differ from AC; insulation grading and external creepage are tailored for the operating polarity and site pollution level.
• Designs can be aligned with project-specific type tests, seismic requirements, and seismic / torsion limits at the transformer interface.
• Suitable for new-build HVDC links and selective retrofit programmes where the bushing interface and external insulation must be re-rated for DC service.