Then, then
When the breaker is in close condition, the current flows in the main contal. When the contacts are open, the main contald fIRST and the Arcing Contory Remains CLOSED.
TheReface, the Current in the main contact moves to the arcing contact. Now the arcing contActs are
The Arc is split in this way by arc splitters and this it excited
Low and Medium Voltage Systems Use Acb in Electric Furnaces and in Large Motors. They are available in the righte of 400V to 12kv.
There are three types of Air Circuit Breakers used in the low voltage switch gears and indium voltage. They are:
Plain Break Type or Cross-Blast ACB
Magnetic Blowout Type Circuit Breaker
Air Chute Circuit Breaker
is made to drive in it.
. The Arc Chute is divided into Several Small Compartments by USING METALIC Separation Plates.
Low Voltage Applications.
blow out the coil ".
Auxiliary contacts are closed before and Open after the main contacts of the circuit breaker.
Here Are the Advantages and Disadvantages of the Air Circuit Breaker. Acb Breaker
Advantages:
There is no risk of fire
It was away the arcing products and it prevents restriking
Easy to operate
Low Maintenance
Disadvantages:
INEfficience at Low Current where the electromagnets are weak
Conclusion