RCDFIbrytere

RCDFIbrytere, often abbreviated as RCDs, are electrical safety devices designed to protect people from electric shock. They function by detecting and interrupting imbalances in electrical current. In a healthy electrical circuit, the current flowing out through the live wire should be equal to the current returning through the neutral wire. If an RCD detects a difference, it suggests that current is leaking out of the circuit, potentially through a person who has come into contact with an energized object. This leakage is referred to as a fault current.

Upon detecting such a fault current, the RCD rapidly trips, disconnecting the power supply to the affected circuit. This rapid disconnection is crucial for preventing serious injury or death from electric shock. RCDs are sensitive devices and can detect very small fault currents, often in the range of 10 to 30 milliamperes, which are sufficient to cause harm.

There are various types of RCDs, including residual current devices (RCDs) and residual current circuit breakers with overcurrent protection (RCBOs). RCBOs combine the functions of an RCD and a miniature circuit breaker (MCB), providing protection against both earth faults and overcurrents (overloads and short circuits). RCDs are a vital component of modern electrical installations and are mandated in many building regulations to enhance safety. Regular testing of RCDs is recommended to ensure their continued effective operation.