RCCBs are useful as it supports in all systems up to 240/415 V AC. Devices of type AC trip in the event of sinusoidal AC residual currents. Type A also trips in the event of pulsating DC residual currents.
RCCBs with a rated residual current of a maximum of 30 mA is useful for personnel, material and fire protection. Also, for protection against direct contact. Furthermore, RCCBs with a rated residual current of 10 mA is primarily applicable in areas that represent an increased risk for personnel.
URL:https://mall.industry.siemens.com/mall/en/WW/Catalog/Product/5SM3321-4
