• Low losses: Utilizing our company’s professional design scheme, the no-load loss is reduced by 15% compared to the national standard, and the load loss is reduced by 5%.
• Low noise: The noise level is reduced by 3~5dB compared to the national standard.
• Low partial discharge: The factory partial discharge test value is less than 100 Pc.
• Strong short circuit resistance: Passed the sudden short circuit test by the National Electrical Product Quality Inspection and Testing Center.
• No leakage: All sealing parts are made of acrylic one-piece molded components, using fluorescence, positive pressure and negative pressure for leak testing.
• Strong Overload Capacity, Energy Efficient and Environmentally Friendly.
• Reliable Operation, Easy Installation, Maintenance, and Transportation.

    Our company’s product, the SFZ22-240000/220, has successfully passed all routine type tests, including the short-circuit endurance capability assessment conducted by the National Electrical Product Quality Inspection and Testing Center.
    We offer a versatile range of models and capacity configurations, including the S(F)Z20/22 double ­winding on-load tap changer, the SS(F)Z20/22 three-winding on-load tap changer, and the S(F)20/22 double-winding no-excitation tap changer. These various specifications a re designed to meet our customers’ diverse customized requirements.