Type A (pulsating, smooth and alternating residual sinusoidal currents up to 1KHz).Type A (alternating and/or pulsating current with DC components).Residual current circuit breaker with overload protection (RCBO)Ĭriteria II – Wave form of earth leakage currents detected: ( see details).Residual current circuit breaker (RCCB). The following devices are all RCDs, equipped with additional functions and features, offering cost effective solutions in different applications.Ĭriteria I – Additional functions and features: I assume that you already know the working principle of residual current device, so the main focus will be on the classifications according to RCD’s functions and features and on the other hand – wave form of earth leakage currents RCD can detect. RCDs are now widely used in most of the world, in some cases this is required, while in others their use is optional. Which type of residual current device (RCD) you should use for protection
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