Why we use motorized circuit breaker?

In summary, a motorized circuit breaker is used to close the circuit without the need for someone to manually operate the lever. When the power is lost, the undervoltage trip coil will open the circuit breaker.
  • #1
Mateen-ud-din
12
0
hi all...
i want to know you buddy..
why we use motorized circuit breaker along with under voltage trip (utp) and how motorized circuit breaker works along with under voltage trip (utp)...
i want to know briefly about this procedure...
your answer will be appreciate.
thanks advance...
 
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  • #2
Circuit Breakers need a way to operate. This can be locally (when you stand in front of the CB) or remotelly by giving an electrical signal commanding the circuit breaker to close.
Before to be able to close CB you have to charge a strong spring inside CB. This charged spring is used to close CB contacts internally.

So for local operation you manually charge the spring using a particular lever for that purpose. With a button mounted on the CB front face, you press it and you close the CB.

When you want remote operation of the CB you need a kind of motor to charge the internal spring (so we call this CB motorized).
Moreover, for remote operation you need a couple of electrical reles (coils) such as "close coil" and "open coil". This coils are capable to be remotelly energized by a signal and thus can close / open the CB.

Since we talk about open/close coils it is clear that coils need auxiliary power to operate. If for some reason auxiliary power is lost, then you are not able to operate the coils (close / open). Imagine that you have sucesfully closed circuit breaker (by remotely energizing close coil) but during operation for some stupid reason auxiliary voltage is lost . As a result you can't open the CB!
UnderVoltage Coil comes to cover this hole.
In case auxiliary power required for the coils to work is lost, the undervoltage trip coil forces the opening of the circuit breaker.
Notice that undervoltage trip coil is optional. Close and Open coils is mandatory for remote operation.
 
  • #3
thanks ge.vasiliou...this is go0d knowledge for me....
 

Related to Why we use motorized circuit breaker?

1. Why do we use motorized circuit breakers?

Motorized circuit breakers are used to protect electrical circuits and equipment from damage caused by overloading or short circuits. They automatically trip when an abnormal amount of current flows through the circuit, preventing damage to the equipment and potential hazards such as fires.

2. How does a motorized circuit breaker work?

A motorized circuit breaker consists of an electromechanical mechanism that is triggered when the current in the circuit exceeds a certain level. This mechanism uses a motor to trip the breaker and disconnect the circuit when needed. The motorized mechanism allows for faster and more accurate tripping compared to traditional thermal or magnetic trip mechanisms.

3. What are the advantages of using motorized circuit breakers?

Motorized circuit breakers offer several advantages over traditional circuit breakers. These include faster tripping times, higher accuracy in tripping, and the ability to remotely control and monitor the breaker. They also have a longer lifespan and require less maintenance, making them a more cost-effective option in the long run.

4. Can motorized circuit breakers be used for both residential and commercial applications?

Yes, motorized circuit breakers can be used in both residential and commercial applications. They are commonly used in industrial settings where there is a high risk of overloading or short circuits, but they can also be installed in homes to provide increased protection for electrical systems and appliances.

5. Are motorized circuit breakers more expensive than traditional circuit breakers?

Motorized circuit breakers may have a higher upfront cost compared to traditional circuit breakers. However, their longer lifespan and lower maintenance needs make them a more cost-effective option in the long run. Additionally, the added protection and control features of motorized circuit breakers make them a valuable investment for both residential and commercial applications.

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