This product series features an advanced design with significant improvements in materials, structure, and manufacturing processes. The high- and low-voltage clamps are secured using steel tie straps together with upper and side beams, forming a rigid frame structure that enhances core clamping force and resistance to transportation impacts. The series offers strong short-circuit withstand capability, elegant appearance, reliable operation, low losses, and low noise, reaching a performance level comparable to advanced foreign products of the same type. The prototype of the SZ9-20000/35 transformer successfully passed the sudden short-circuit test conducted by the National Transformer Testing Center on the first attempt. Longitudinal oil channels provided in the high- and low-voltage coils facilitate heat dissipation, significantly reducing the copper-oil temperature difference and the hot-spot temperature rise inside the coils.
Product Model
S ¨ ¨ ¨ ¨ / 35
① ② ③ ④ ⑤ ⑥
①Three-phase
②"F" stands for air-cooled Self-cooling has no code.
Off-circuit (no-excitation) voltage regulation has no code.
③"Z" stands for on-load voltage regulation.
④Loss series
⑤Rated capacity (kVA)
⑥Voltage level (kV)