The difference between MCB\MCCB\ACB

Update date:2018-02-02 Source:MAXGE

ACB- universal (frame type) circuit breaker circuit breaker DZ5.

MCCB- molded case circuit breaker.

MCB- miniature circuit breaker.

ELCB- leakage circuit breaker dzl18-20/2.

The main differences are:

Breaking capacity is different, the higher breaking capacity of ACB, MCCB, MCB worst, of course, there are a lot of MCCB production enterprises of the breaking capacity of MCCB do high, but the stability and the reliability is bad;

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More than

The location of the installation, ACB was adopted as the main circuit breaker, because it itself has the time delay function, can delay the breaker and trip, but also has the very good communication function and selectivity, while MCCB was adopted as power distribution electric, in the middle of the line, because it only has the capability of breaking and inverse time tripping ability, do not have a selective, more protection switch emergency stop switch HW only as subordinates; MCB is used in the load terminal because it has a relatively low splitting capacity of 6000A and 4500A;

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The appearance size is also quite different. The size of MCB is small and easy to install. The largest volume of ACB is in the middle of the MCCB.

First is breaking ability is different, the higher breaking capacity of ACB, MCCB, MCB worst, of course there are many productive enterprises of MCCB the breaking capacity of MCCB do high, but the stability and the reliability is bad; Again to be the location of the installation, ACB was adopted as the main circuit breaker, because it itself has the time delay function, can delay the breaker and trip, but also has the very good communication function and selectivity, while MCCB was adopted as power distribution electric, in the middle of the line, because it only has the capability of breaking and inverse time tripping ability, do not have a selective, more protection switch only as subordinates; MCB is used in the load terminal because it has a relatively low splitting capacity of 6000A and 4500A; Finally, their appearance size is also very different. The size of MCB is small, easy to install, and the largest size of ACB, the installation of complex, MCCB residence!!

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