What are Miniature Circuit Breakers (MCBs)?
Earlier, the technology in use was – fuse. The efficiency of fuse was less and protection was almost impossible. Therefore, fuses had to be replaced with MCB for safety and better control for the electric system. MCBs or Miniature Circuit Breakers work as automatic electrical switches that are designed to protect an electrical circuit from damage. These are time delay tripping devices controlled by the magnitude of overcurrent. Generally, these are programmed to operate at less than 2.5 milliseconds during a short circuit and 2 seconds to 2 minutes in case of overloads (depending on the magnitude of current). The device opens when excessive current flows through the circuit. Once the magnitude of current in the circuit returns to normal, it can go to its normal state without any manual replacement. To fulfill what it is required to do, the MCB is characterised by low current ratings and fixed trip settings. To comply with the domestic and commercial needs, a wide variety of MCBs have...