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ANSI Medium Voltage High Current Aluminum Flange Transformer Bushing (25~46kV, 315A~3150A)

This ANSI high-voltage aluminum conductor flange bushing is dedicated for North American oil-immersed transformers. It covers 25kV, 34.5kV, 46kV voltage levels and 315A–3150A full current range for various transformer capacities. Featuring a lightweight high-purity aluminum conductor and integral cast aluminum flange, the bushing delivers stable large-current conduction and solid structural performance. The HTV silicone rubber outer insulation provides excellent anti-aging, anti-pollution and anti-flashover capability, adapting to coastal, industrial, high-altitude and extreme temperature working conditions.


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Product description


 
Strictly compliant with ANSI American standards. The flange size, insulation parameters and interface specifications perfectly match North American oil-immersed transformers. It supports in-situ replacement without tank modification and meets grid access inspection requirements.
Adopts high-purity aluminum conductor, over 35% lighter than copper versions, reducing transformer top load and oil leakage risks. It maintains stable current transmission from 315A to 3150A with low temperature rise, ensuring safe high-current operation and cost reduction.
Equipped with HTV silicone rubber outer insulation, featuring excellent aging resistance, pollution flashover resistance and corrosion resistance. It adapts to coastal salt fog, industrial pollution, high altitude and extreme temperature environments, ensuring long-term stable insulation performance.
Integrated precision-machined cast aluminum flange matched with oil-resistant and low-temperature gaskets ensures excellent tightness without oil leakage. Reserved oil filling and air vent holes facilitate easy maintenance. All products pass full ANSI type tests and 100% factory inspection for stable quality.
Covers 25kV/34.5kV/46kV voltage levels and 315A-3150A full current range for all types of transformers. Customization of terminals, immersion depth and special structures is available, flexibly meeting new matching and old renovation project demands.

   

Product Parameter

 

 

                                                                                                 

Rated Voltage: 25kV / 34.5kV / 46kV (Full ANSI medium voltage class coverage)
Rated Current: 315A ~ 3150A (Optional: 315A, 400A, 630A, 800A, 1000A, 1250A, 1600A, 2000A, 2500A, 3150A)
Power Frequency Withstand Voltage: Compliant with ANSI C37.72 standard, customized according to voltage level
Lightning Impulse Withstand Voltage (BIL): Matches North American grid standard insulation level
Max Continuous Temperature Rise: ≤65K under full rated current operation
Partial Discharge: ≤10pC (No floating potential, uniform electric field)

Weather Resistance: UV aging resistant, ozone corrosion resistant, anti-pollution flashover, anti-icing flashover
Oil Compatibility: Long-term stable immersion in mineral insulating oil, no swelling or hardening

 

Tips: Different current and voltage specifications of American standard aluminum flange bushings are available. Welcome to send us your requirements for free quotation and professional technical guidance.

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