By absorbing and imbibing advanced technologies and research and development designing on110kV power transformer from both home and abroad, we put improvement of products’ reliabilityas the tenet and refer to technological research and development to conduct gradual perfection ontechniques and structure and strict quality system control so that products we produce are greetedwith good reputation among myriads users. S18, S20, S22 series power transformer caries such characteristics as low loss, low noise, low partial release, high mechanical intensity, high power intensity,full seal and no suspended core. It can drastically save operational cost and improve economic efficacy and safety of the power network.