What is a Miniature Circuit Breaker (MCB)?
MCB often referred to as “Miniature Circuit Breaker” is a kind of electromagnetic device used to protect the electrical circuit from unwanted breakdown. The device is operated automatically and hence switches off the low voltage circuit in overload or faulty condition. In short, a Miniature Circuit Breaker can prevent your system from damages caused by a short circuit, over-current, or overload. During short circuit faults, it operates at less than 2.5 milliseconds, but in case of overload, the time increases from 2 seconds to 2 minutes.The device is safe to operate as it is completely enclosed in a molded insulating material. Mcb Manufacturers by our company since last 22 years.
Types of MCB
Before moving further, have a look at the types of MCB’s available in the market.
Type B MCB is the best option for light commercial and residential installations
These MCBs isused for high inductive commercial installation like small motors, fluorescent lighting and residential installation as well.
Used for inductive loads which areextremely high such as UPS systems, X-ray machines, industrial welding equipment, etc.
The minimum trip current and maximum trip current of all types of MCB’s are provided in a tabular format.
Type of MCB |
Min. Trip Current |
Max. Trip Current |
Type B |
3 lr |
5 lr |
Type C |
5 lr |
10 lr |
Type D |
10 lr |
20 lr |
lr =rated current of the Miniature Circuit Breaker or MCB
A few words about the Trip Unit
The main part of the MCB is the “Trip Unit”which is responsible for the proper working of the device. Generally, the trip mechanism is differentiated into two types:
Advantages of MCB’s
There are several advantages due to which MCB is preferred over fuse. Here we go:
Wrap Up:
So, if you want to install a device that protects alow voltage electric system from short-circuit or unwanted breakdown, go forMiniature Circuit Breaker Construction or MCB. Mccb Manufacturers by our company since last 22 years.