... voltage 400V(690V) and rated current up to 4000A, satisfying power distribution, motor concentrated control and capacitance compensation. It is ... places like power plants, petroleum, metallurgy, textile and tall buildings, conforming to relevant standards such as IEC60439-1, GB7251. ... to 400A;6. The drawer panel is marked with obvious signs for positions as breaking, making, testing and drawing out. ...