Jordfeilstrømsrelé

Jordfeilstrømsrelé, also known as earth leakage circuit breaker or residual current device (RCD), is an electrical safety device designed to protect people from electrical shocks by quickly interrupting the flow of electric current in the event of a fault that allows current to travel to ground. This type of relay is commonly used in residential, commercial, and industrial settings to ensure the safety of personnel.

The primary function of a jordfeilstrømsrelé is to monitor the electrical current flowing through a circuit and compare it with the current returning to the source. If there is a discrepancy, indicating that some current has leaked to ground, the relay will trip, opening the circuit and stopping the flow of electricity. This rapid interruption is crucial in preventing serious injuries or fatalities from electrical shocks.

Jordfeilstrømsrelé are typically rated by their sensitivity, which is measured in milliamperes (mA). The most common ratings are 30 mA and 100 mA. A 30 mA relay is more sensitive and will trip at a lower level of leakage current, providing faster protection but potentially tripping more frequently due to minor faults. A 100 mA relay is less sensitive and will only trip at a higher level of leakage current, offering slower protection but reducing the risk of nuisance trips.

These relays are essential components in electrical systems where safety is a priority, such as in bathrooms, kitchens, and outdoor areas. They are often required by building codes and regulations to ensure compliance with electrical safety standards. Regular testing and maintenance of jordfeilstrømsrelé are essential to ensure their continued effectiveness in providing protection against electrical shocks.