■  Be sealed up limitedly, and all the seal components are not exposed to air, with better sealingperformance and longer service life.

■  Using irrigating flange porcelain and with high mechanical strength.

■  With stable insulating property, slight partial discharge and low dielectric loss.

■  With low flux density and perfect anti-ferromagnectic resonance capability.

■  With sound iron core performance, low dissipation, good excitation characteristic and wideload range.