There are two main types of RCCBs (Residual Current Circuit Breakers) based on their operating characteristics:
AC RCCB (Type AC RCCB): AC RCCBs are designed to protect against residual current with an alternating current (AC) waveform. They are suitable for most residential and general-purpose applications where the electrical load consists primarily of AC-powered devices. AC RCCBs can effectively detect and trip in the presence of sinusoidal AC leakage currents.
A (or A-Type) RCCB (Type A RCCB): A-Type RCCBs are more versatile and can provide protection against a wider range of residual currents, including both AC and pulsating DC (direct current) leakage currents. These RCCBs are suitable for installations where electronic equipment with rectifiers or electronic switches is used. Type A RCCBs are more sensitive to various types of leakage currents and are designed to offer enhanced safety in modern electrical systems.