VD4 Type medium-voltage indoor vacuum circuit breaker is applicable for three-phase AC power system of rated voltage up to 42kV and frequency 50/60Hz, widely used in many fields such as power plant, transformer substation, petrol chemical industry, metallurgy, manufacturing industry, airport, residential area, etc., to control and protect the electric equipment, especially.
This circuit breaker is standards as IEC62271-100, GB1984-2003 high voltage circuit breaker for order as well as IEC60694.
This circuit breaker is made with mature APG technology. The application of RVB terminal buffer guarantees the terminal is ever more reliable in nay operation environment.
A) Air temperature: Maximum temperature: +40C; Minimum temperature: -25C
B) Humidity: Monthly average humidity 95%; Daily average humidity 90%.
C) Altitude above sea level: Maximum installation altitude: 2500m
D) Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
E) No frequent violent shake.