BDFW 40.5KV 800A-5000A High Current Transformer Bushing

BDFW 40.5KV 800A-5000A is an oil-immersed condenser type high current bushing for 40.5kV (35kV) systems, covering rated currents from 800A to 5000A. Designed for large power transformers, power plants, substations and special converter applications, it delivers ultra-high current carrying capacity, superior insulation and long-term reliability.Featuring optimized condenser core, enhanced heat dissipation and precision sealing, it has low partial discharge, low dielectric loss and excellent thermal shock resistance, fully compliant with GB/T 4109 & IEC 60137 standards.

Model Explanation

• B: Transformer Bushing
• D: Oil-immersed Condenser Type
• F: Flange Mounted
• W: Weather-proof / Outdoor
• 40.5KV: Rated Voltage 40.5kV
• 800A-5000A: Current Range (800A/1250A/1600A/2000A/2500A/3150A/4000A/5000A)

Key Specifications

• Rated Voltage (Um): 40.5kV
• Rated Current (Ir): 800A, 1250A, 1600A, 2000A, 2500A, 3150A, 4000A, 5000A
• Insulation: Oil-impregnated paper condenser core + porcelain / composite housing
• Power Frequency Withstand: 95kV (dry); 80kV (wet)
• Lightning Impulse (BIL): 200kV (peak)
• Partial Discharge: ≤5pC @ 1.5Ur/√3
• Dielectric Loss (tanδ): ≤0.008 @ 10kV, 50Hz
• Creepage Distance: Standard ≥1260mm; Anti-pollution (L) ≥1600mm
• Flange: Non-magnetic Si-Al alloy (high current)
• Sealing: IP68, leak-proof for life
• Ambient: -40℃ ~ +105℃, Altitude ≤3000m, Pollution Class Ⅲ/Ⅳ

Key Features

• Ultra High Current Rating: Large conductor + multi-path cooling, stable at 5000A full load
• Condenser Grading: Uniform E-field, compact size, high insulation margin
• Non-magnetic Flange: Eliminates eddy current loss & overheating
• Dual Sealing: Lifetime maintenance-free, zero leakage
• High Mechanical Strength: Earthquake & typhoon resistant
• Full Range: 800A–5000A, standard / anti-pollution (L) / seismic types

Applications

• 35kV/40.5kV Large Power Transformers
• Power Plant Step-up Stations & Substations
• Solar/Wind Collector Stations & Energy Storage PCS
• Metallurgical & Chemical Rectifier Transformers
• Industrial Furnace & Electrolysis High Power Systems

Why Choose Us

Specialized in BDFW/BFW 40.5kV high current bushings (50A–5000A). Certified ISO 9001 & IEC, passed national type tests. OEM/ODM customization, fast prototyping and stable mass production. One-stop solution for transformer builders, switchgear factories and global EPC contractors.