1250a AC MCCB

SM1 series MCCB Moulded Case Circuit Breaker, which is the one kind of new type circuit breakers researched and developed by our company adopting advanced design and manufacturing technology.

 

This circuit breaker of rated in insulation voltage 660V is suitable for infrequently switching circuit of AC50Hz,rated operating voltage 380V or below, rated operating current up to 800A and starting motor infrequently .

 

Furthermore, the circuit breakers has overload, short-circuit and under voltage protection equipments that can prevent circuit and power device being damaged. The circuit breaker conforms to IEC947-2,GB14048.

 

It is sorted into three-pole and four-poles according to product pole number. The type for neutral pole of four-pole products is sorted into four kinds:

Type A:N pole can't be installed with over current tripping element , and it always switch on, can't switch on and switch off together with other three poles.

Type B:N pole can't be installed with over current tripping element, it can switch on and switch off together with other there poles.

Type C:N pole can be installed with over current tripping element, and it also can switch on and switch off together with other three poles.

Type D: N pole is installed with over current tripping element, and it always switch on, can't switch off together with other poles.

 

a. Altitude: 2000m or below
b. Ambient medium temperature:-5°C~ +40°C( +45°Cfor marine products)
c. Resist the effect of moist air.
d. Resist the effect of mold.
e. Max inclination: 22.50
f. Placed in the no explosive medium, which can't contain any gas and conductive dust that can erode metal and destroy the insulation.
g. Keep it where can prevent rain and snow