With drawable VCB, ZZS metal-clad middle-fixed switchgear can be applied in 3~12kV distribution system of power stations, distribution stations, city buildings, mine factories or any other industries. Switchgears can be installed in single array or double arrays, also can be installed against the wall. Enclosure and all compartments were assembled with Al-Zn alloyed steel which have been processed on numerical controlled machines with double bending process, thus the assembled switchgear have many perfect characteristics, be better interchangeable, reliable interlocking and could endure internal arc fault. Integrated with intelligent relay, the switchgear can be put into service without site guarder.