VKQ03E Series automatic change-over switch (hereinafter referred to as ATSE) is one of the automatic change-over switches developed and manufactured by our company by adopting the mechatronics integrated control method and the well coupling double breakpoint contact opening and closing technology. It has the outstanding advantages of high automation, long service life, small volume, light weight, safety and reliability. It can be widely used in construction, electric power, post and telecommunications, metallurgy, chemical industry, railway and other industries, especially in emergency lighting, fire fighting and other emergency power supply places of high-rise buildings.