A Comprehensive Guide to Miniature Circuit Breakers and Moulded Case Circuit Breakers

0
535

Circuit breakers play a crucial role in preventing dangerous situations in electrical safety. Circuit breakers protect electrical circuits from damage caused by overcurrents or short circuits. Among the different types of circuit breakers available, MCBs and MCCBs are some of the most common.

MCBs

  • MCBs or miniature circuit breakers are used in low-voltage electrical circuits to protect against overcurrents. They are typically rated for currents up to 125 amps and used in residential and commercial buildings. 

MCCBs

  • MCCB or moulded case circuit breaker is similar to MCBs but handles higher currents. It has a current of up to 2,500 amps in industrial settings where large machinery and equipment operate. 

Difference between MCBs and MCCBs

MCBs and MCCBs are circuit breakers designed to protect electrical circuits from overcurrents. 

However, the main difference between them is their capacity to handle them currently. MCBs are designed for low-current applications, while MCCBs handle high-current applications.

Uses of MCB and MCCB 

  • Miniature circuit breakers, or MCBs, is widely used in residential and commercial settings for safety. MCBs are typically rated for currents up to 125 amps and trip and cut off power in the event of an overload or short circuit. 

Their compact design allows for easy installation and maintenance.

  • MoMoldedase circuit breaker, or MCCB, is commonly used in industrial settings for circuit protection. 

MCCBs are rated for currents up to 2,500 amps and trip and cut-off power in the event of an overload or short circuit. 

Types Of MCB and MCCB

They are available in different sizes and configurations to fit various applications, and their robust construction allows for reliable operation even in harsh environments.

  • MCBs- MCBs are available in different types, such as Type B, Type C, and Type D, which indicate the trip characteristics of the circuit breaker. 

-Type B MCBs protect general-purpose circuits with resistive or slightly inductive loads. 

-Type C MCBs protect circuits with higher inrush currents, such as those in fluorescent lighting and small motors. 

-Type D MCBs protect circuits with high inrush currents, such as those in large motors and transformers.

  • MCCBs- MCCBs are available in different types, such as fixed, adjustable, and draw-out, which indicate the mounting and operating characteristics of the circuit breaker. 

Fixed MCCBs are mounted directly onto a panel or busbar, while adjustable MCCBs can be mounted onto a DIN rail or in a modular enclosure. Draw-out MCCBs are for easy removal and maintenance in switchboards and control panels. 

MCBs and MCCBs are components of an electrical system and play a critical role in protecting against overcurrents and short circuits. However, choosing the right type of circuit breaker depends on the specific application and requirements.

Final Words 

In summary, MCBs, and MCCBs are designed to protect against overcurrents and short circuits. MCBs are commonly used in residential and commercial settings, while MCCBs are in the industrial sector. Both types of circuit breakers are available in different sizes and configurations to fit various applications and requirements. Visit Legrand to know more!