jordfelsbrytarens

Jordfelsbrytarens, which translates to "residual current device" or RCD in English, is a crucial safety device in electrical installations. Its primary function is to protect individuals from electric shock by detecting imbalances in the electric current flowing through a circuit. An RCD works by monitoring the current flowing in the live conductor and the neutral conductor of a circuit. Under normal circumstances, these currents are equal. However, if a person or conductive object comes into contact with an energized part and a path to earth, some current will flow through that path instead of returning through the neutral conductor.

This imbalance, however small, is detected by the RCD. When the difference in current exceeds a predetermined safe threshold (typically 30 milliamperes for personal protection), the RCD rapidly interrupts the flow of electricity to the circuit, thereby disconnecting the power supply. This rapid disconnection minimizes the duration of current flow through the body, significantly reducing the risk of severe injury or electrocution. Jordfelsbrytarens are distinct from circuit breakers, which are designed to protect against overcurrents (overloads and short circuits) but do not offer the same level of protection against earth faults and the associated risk of electric shock. They are an essential component in modern electrical safety standards worldwide.