GCS series are low voltage switchgear that Schneider company authorizes Zhongshan Mingyang Electric to manufacture, which are suitable in the power generation system and power supply system with three-phase AC 50Hz, rated working voltage of 380V(660V) and rated current of 4000A and below for the collective control and capacitance compensation of power, power distribution and electromotor. It's widely applied in the power station, petroleum, chemical engineering, metallurgy, textile, high-rise buildings as well as the sites which have interface with computer with high automation degrees such as the large-scale power station, etc.