MCCB Circuit Breaker

Molded Case Circuit Breaker

Molded case circuit breaker is commonly known as MCCB and performs protection action during occurrence faults. The protection of faults majorly includes overload and short circuit conditions. The most significant feature of MCCB that makes it prominent over other devices is that its ability to reset after tripping whereas in fuses the device has to be replaced with a new one.

These devices have auxiliary contacts, undervoltage release, and shunt trips that enhance their performance and make them more versatile for different applications.

MCCB is used in high-current applications. They can be implemented either in the protection of an individual circuit or many circuits. MCCB exhibits certain other superior properties such as feasibility for remote operation and trip settings (current and time settings) that can be altered.

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Branch: Electrical Engineering

Subject: Power System

Topic: Power System Protection

Subtopic: MCCB Circuit Breaker

Learning Objectives

After completing this module, you will be able to:

1. Learn the working principle of MCCB and analyze its protection of devices against overload and short circuit conditions.
2. Describe the different types of MCCB and various components and their purpose.
3. Study the various testing of MCCB.
4. Figure out the applications of MCCB in various industries.