40.5KV Handcart Type vacuum circuit breaker is a three - phase AC 50Hz rated voltage 40.5kV indoor switch equipment of power system . It is used as the protection and control unit of power grid equipment and power cquipment of industrial and mining enterprises . It is suitable for frequent operation under rated operating current or for short circuit current . 

The circuit breaker arrangement with upper and lower structure , effectively reduce the depth of circuit breakers . And the use of composite structure , three - phase interrupter and associated charged body by the three independent phase separation of epoxy resin insulation casing , using a composite structure , the circuit breaker to meet the air under normal operating conditions from the required distance and climb and effectively reduce the size of circuit breakers , electrical circuit interrupter , a leading and dynamic and static conductive connection installed in the insulating tube , so that the distance only 300mm. All main circuit electrical connection fixed to connect with high reliability .

Environmental conditions 

Ambient air temperature : upper limit +40℃. Lower limit -15℃ ;

Altitude : less than 1000m( for higher altitude , is rated insulation level increase );

Amplitude of vibration: the earthquake intensity is not more than 8 degrees ;

The daily average value of  air relative humidity is not greater than 95%, 

and the average monthly value is not greater than 90% ;

No Fire , explosion , danger , serious pollution , chemical corrosion and violent vibration .

Executive Standard 

GB1984 AC High Voltage circuit breaker

DL/T403 12~40.5KV Indoor AC high voltage circuit breaker ordering technical conditions
IEC60694

IEC6227-100