The residual current device RCD achieves the following protections,and should be associated with a MCB:

• protection for users against electric shocks by direct contacts (<30 mA),
• protection for users against electric shocks by indirect contacts (300 mA),
• protection of the installations against fire risks (300 mA).

While the RCBO achieve the above mentioned protections (with different settings) in addition to protection against short circuits and cable overload

Released for:Schneider Electric Saudi Arabia