Single-phase combined-type meter box (with small master control box) (card) 1, product scope and application conditions LiuNa series plastic meter box including single-phase and three-phase meter box two parts ,Suitable for ac 50 hz or 60 hz,Rated voltage 220 volts, 380 volts, 690 volts,Rated current for 10 volts to 255 volts power supply system,For single-phase electric energy and Dynamic energy metering controlling management. Conditions of use:environment temperature-25¡ãC~+80¡ãC,and within 24 hours of the average temperature not more than 35 degrees Celsius. Clean air, relative humidity in 40 Celsius for 80 degrees Celsius,lower temperature allowed have higher relative humidity. 2, product specifications and types 3, product main technical parameters Main busbar rated current in: 225A ~ 10A Main busbar rated inside short time tolerance current:35KA Insulation resistance: more than 20 ohms ¡¤ m The rated voltage for: the 800v insulation Frequency: 50 hz or 60 hz Safety protection grade IP: 30