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.
High performance polymer materials
Improved polymer to endure larger temperature rating, UV stability, and service life.
High mechanical strength：
Higher impact resistance in comparison to porcelain. Strict inspection of torque force 100% coverage.
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.
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
High performance polymer materials
Improved polymer to endure larger temperature rating, UV stability, and service life.
High mechanical strength：
Higher impact resistance in comparison to porcelain. Strict inspection of torque force 100% coverage.
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.
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
