residual current device

(redirected from residual current devices)
Also found in: Dictionary.
Related to residual current devices: MCB, Ground fault circuit interrupter

residual current device

A circuit breaker that trips when there is a difference between the amount of current in the hot side and the neutral side. Also called a "ground fault circuit interrupter" (GFCI) and an "appliance leakage current interrupter" (ALCI), the current imbalance implies a leakage to ground or another circuit. Residual current devices (RCDs) are typically built into a wall outlet and are required for wet areas, such as bathrooms and kitchens, where electrical appliances can come in contact with water.
References in periodicals archive ?
Residual current devices may be classified upon their ability of detection of a determined current waveform and time-delay operation.
"The residual current device is a safety device that switches off electricity automatically if there is a fault.
There was also no protection from Residual Current Devices (RCDs) which are fitted to help prevent electric shock and other accidents caused by faulty appliances or wiring.
Australian and New Zealand Standards (AS/NZS) require that cardiac and body protected areas incorporate either a) residual current devices or b) an isolation transformer and line isolation monitor.
Householders are advised to fit residual current devices (RCDs), which act as trip switches instantly cutting power when a lead is cut.
Contract awarded for Provision of Routine Maintenance for Inspection, Servicing and Reporting on Residual Current Devices, Emergency Escape and Exit Lights, Testing and Tagging and Solar Electric Panels to various Government Departments in Carnarvon and Exmouth Regions
Comparison of Residual Current Devices Tripping Characteristics for Selected Residual Current Waveforms // Electronics and Electrical Engineering.--Kaunas: Technologija, 2010.--No.
The component is designed for use inside the world's first fully digital residual current devices (RCD) which were launched by Moeller at a trade show in Frankfurt, Germany, yesterday.
Comparison of Residual Current Devices Tripping Characteristics for Selected Residual Current Waveforms // Elec-tronics and Electrical Engineering.--Kaunas: Technologija, 2010.--No.
Protection under single-fault conditions is provided by fault protection (protection against indirect contact) mainly by automatic disconnection of supply with overcurrent devices and/or residual current devices. Residual current devices ensure automatic disconnection of supply especially if the impedance of the fault limits the current to a value that is below the overcurrent protection threshold.