An MCB (Miniature Circuit Breaker) is a crucial safety device in electrical systems. Its main functions include:
1. **Overload Protection**: An MCB protects the circuit from drawing more current than it can safely handle. When the current exceeds a preset limit, the MCB trips, breaking the circuit and preventing overheating or potential fire hazards.
2. **Short Circuit Protection**: An MCB also safeguards against short circuits. When a short circuit occurs, causing a sudden surge of current, the MCB quickly trips to disconnect the power, preventing damage to the wiring and appliances.
3. **Switching**: MCBs can be manually switched on and off, allowing users to easily disconnect circuits for maintenance or in case of emergency.
These functions ensure the safety and stability of electrical systems, preventing damage and reducing the risk of electrical fires.