Skip to main content

social

pop

MCB and MCCB, differences between MCB and MCCB

Differences between MCB and MCCB, and characteristics

The first thing here is to know the meaning of the abbreviations MCB and MCCB.
What does MCB and MCCB stand for?
  • MCB stands for Miniature Circuit Breaker.
  • MCCB stands for Molded Case Circuit Breaker

MCB and MCCB

Miniature Circuit Breaker (MCB)

It is an electromechanical device used to protect a low load electrical circuit. It is thermally operated and used for protection against over load, heating and short circuits, in circuits requiring a small current rating (less than 100A). It is designed to replace the ancient fuse rewirable device.
The Miniature circuit breaker (MCB) functions as an automatic switch OFF device which routinely turns OFF when the current flowing through it passes the threshold (maximum acceptable limit). This is achieved through the use of a bimetallic strip which protects against overload and the use of a solenoid which protects against short circuit.

Application of MCB: low load domestic and industrial installations.


MCB
An MCB

Characteristics of a Miniature Circuit Breaker (MCB)

  • Thermal/magnetic operation
  • MCB Current Rating: less than or equal to 100A.
  • MCB breaking capacity: 10 KA, at a voltage level of 230 or 440V.
  • Pole availability: MCB is available in single pole, two pole, and three pole.
  • MCB tripping circuit is fixed.
  • Remote ON/OFF: is not possible.

Molded Case Circuit Breaker (MCCB)

It is an electromechanical device used to protect a heavy load electrical circuit. It is thermally operated for protection against overload current and magnetically operated for protection against short circuits and is used in circuits requiring a current rating of more than 100A. It may also have an inbuilt under voltage and frequency protection system. Unlike a rewirable fuse, it can simply reset.

Application of MCCB: heavy load commercial and industrial installations.

Characteristics of a Molded Case Circuit Breaker (MCCB)

  • Thermal/magnetic operation
  • Current rating of MCCB: up to 3000A.
  • MCCB breaking capacity: up to 150kA
  • MCCB tripping circuit is movable
  • MCCB pole availability: single pole, two pole, three pole, four pole.
  • Remote ON/OFF may be possible.
MCCB
An MCCB

EKETECH

Types of Circuit Breakers


Labels:
Location: Nigeria

Popular posts from this blog

How to Install Proteus 8 Professional: A Step-by-Step Guide

 How to Install Proteus 8 Professional: A Step-by-Step Guide Proteus 8 Professional is a powerful tool for electronic circuit design and simulation. Whether you’re a student, hobbyist, or professional engineer, following a clear installation process ensures you get started without headaches. Are you ready to start designing and simulating electronic circuits with Proteus 8 Professional!   Here’s a comprehensive, guide to installing Proteus 8 Professional on your Windows PC. Step 1: Download the Installer ·        Visit the official Labcenter Electronics website or another trusted source to download the Proteus 8 Professional installer. Avoid unofficial sources to prevent malware or corrupted files . You can download from HERE DOWNLOAD PROTEUS AND ARDUINO ·        The installer typically comes as a ZIP file. Wait for the download to finish and locate it in your Downloads folder Step 2: Extract the Installer...
Click Here to Read more »

Intermediate switch connection and wiring diagram

Intermediate switch An intermediate switch is a switch which permits the control of a lighting point from three positions. In order to control this lighting point from the three positions, the intermediate switch is connected together with two other 2-way switches. Application: it can be used in lighting a room or hall having 3 entrances , it can also be used in long corridors and staircases. We shall be looking at these connections. Connection diagram of intermediate switching Below is an illustration of the connection. The brown lines indicated on the diagram are the switching contacts. The switch labelled 2 is an intermediate switch . The figure below is the configuration of an intermediate switch. The switch labelled 1 and 3 in the first diagram are two-way switches.  Click here to know more about two-way switches . ON and OFF positions of intermediate switching ON positions OFF positions Staircase wiring layout using an inte...
Click Here to Read more »

WHAT IS A MULTIPLEXER?

  MULTIPLEXER we are going to see more complex combinational logic circuits or combinational devices which are the multiplexer and demultiplexer. These devices are can be found as integrated circuits (ICs) and are widely used in the field of telecommunication like in multiplexing. WHAT IS A MULTIPLEXER? A multiplexer also called data selector is a device that selects one of many input signals and forwards the selected input to the output. A multiplexer of 2 n inputs has n select bits, which are used to select which input line to send to the output.   See figure 1. An electronic multiplexer makes it possible for several signals to share one device or resource like one communication line instead of having one device per input signal. An example can be in a cyber where many computers are connected to the same printer, another example is an mp3 player, laptop, digital cable TV connected to a single surrounding sound system through a Mux.  
Click Here to Read more »