Residual current circuit breaker

Fault current protection

Residual current protection is an important system that is used to prevent electrical accidents and protect people and equipment from electrical hazards. It plays a key role in electrical installations and ensures the safety of electrical systems. The primary purpose of residual current protection is to detect and interrupt electrical currents that are outside their normal range. This may include currents that are too high or currents that deviate from standards and norms that are harmful, such as to the human body. When residual current protection detects such a problem, it automatically cuts off the electrical supply, preventing the risk of electric shock or fire. Residual current protection is particularly important in situations where people work with electricity or are at risk of electrical accidents. This includes electrical workers, construction workers, electricians, as well as people who take care of home electrical systems.

Residual current protection works on the principle of leakage current in case of broken insulation of a power cable or other malfunction of a consumer connected to the power supply. After detecting the leakage current, it is measured and if its magnitude exceeds that of the protection range, it instantly cuts off the electrical circuit.