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A5-Brief
Since 2002, Yangzhou Daheng Electric Technology Ltd (DHE) has been dedicated to design and manufacture secondary bushings for ANSI transformers, including epoxy, tri-angle, porcelain and other polymer type.
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High performance polymer materials
Improved polymer to endure larger temperature rating, UV stability, and service life.
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High mechanical strength：
Higher impact resistance in comparison to porcelain. Strict inspection of torque force 100% coverage.
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High electrical performance：
Higher dielectric strength and superior electrical performance compared to a porcelain assembly. Removal of air gaps and assembly hardware improves partial discharge performance and reduces potential leak paths.
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Type Test
The tests were conducted in accordance with IEC60137
Ø Dielectric Tests
Impulse test
Low Frequency 60 Hz Withstand test
Partial Discharge test
Ø Mechanical Strength Tests
Leak test
Stud Interface Strength test
Stud Torque Strength test
Cantilever test
Flange Torque test
Ø Environmental Tests
Thermal Cycle test
Temperature Rise test
