Residual Current Relay
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- Department: Fuses and automatic switches
- Category of products: Automatic switches
- Sub-category: Difference switches
- You've seen it before.: 1
Residual Current Relay RCQ
The residual current relay (RCQ) is a protective device used in electrical systems to detect and interrupt the flow of fault currents.
These relays operate by monitoring the difference between the incoming and outgoing currents in a circuit. When the difference, known as the residual current, exceeds a predetermined threshold, the relay trips, interrupting the power supply to prevent damage or injury.
