1.High reliability,Low loss, noise and partial discharging, 2 .small ... IEC726, DIN425235, Insulation Level: LI75CA35/LI0AC36, Connection: Yyn0 or Dyn117, Transformer shell is optional, its production class is Ip20 or IP238 ... noise and low partial discharge13, Strong Overload Capacity14, High short-circuit resistant ability15, High insulation ability under over-voltage condition16, Mounted in sites ...