A miniature circuit breaker (MCB) is a type of electrical protection device that is used to protect electrical circuits from damage caused by overloads or short circuits. MCBs are similar in function to traditional fuse boxes, but they offer a number of advantages over traditional fuses.
MCBs are typically smaller in size than traditional fuses, making them more compact and easier to install in tight spaces. They also have a longer lifespan than traditional fuses, which need to be replaced each time they blow. Additionally, MCBs can be reset after a fault has been cleared, whereas traditional fuses need to be replaced.
MCBs work by detecting an overcurrent condition in the circuit, and then breaking the circuit to prevent damage. They are typically rated for a specific current, such as 10 amps or 15 amps, and will trip or break the circuit when the current exceeds this rating.
There are several types of MCBs available on the market, including thermal-magnetic, electronic and residual current devices (RCD). Thermal-magnetic MCBs use a combination of thermal and magnetic elements to detect overcurrent conditions. Electronic MCBs use electronic components to detect overcurrent conditions, and they offer faster trip times than thermal-magnetic MCBs. RCD MCBs are designed to protect people from electrical shock by sensing leakage current and breaking the circuit when leakage current is detected.
MCBs are widely used in both residential and commercial settings, and they are typically installed in electrical panels or distribution boards. They are also used in a wide range of industrial and commercial applications to protect electrical circuits and equipment from damage.