S9-(M) series of transformer is used in 6-11kV, 60 Hz power transmission and distribution system fro power supply. It feaures energy-saving, low noise, high efficiency and operation reliability reliability as well as long service life and small area occupation.
SZ9-(M)is transformer on the base of S9 seires, with OLTC.
This transformer product can be installed and used in both  outdoor and indoor, and is the very ideal equipment in distribution network