An RCBO is a protective device that combines the functions of an MCB (Miniature Circuit-Breaker for overcurrent protection) and an RCCB (Residual Current Circuit-Breaker for earth leakage protection) into a single unit. IEC 61009-1 is the international standard that specifies the safety, performance, and testing requirements for these hybrid devices.
The standard mandates rigorous tests beyond simple trip timing: iec 61009-1 rcbo standard overview
IEC 61009-1:2024. Residual current operated circuit-breakers with integral overcurrent protection for household and similar uses ( IEC Webstore An RCBO is a protective device that combines
applies to RCBOs with rated voltages not exceeding 440 V AC (typically 230/400 V) and rated currents up to 125 A. The standard ensures that the device can: The IEC 61009-1 standard applies to RCBOs with
: The standard mandates that the device must operate independently for both residual current (earth leakage) and overcurrent (thermal/magnetic) faults.
: Because the standard allows for a combined unit, you save significant space in the distribution board compared to installing a separate MCB and RCD.
The IEC 61009-1 standard applies to RCBOs with rated voltages up to 440 V AC and rated currents up to 125 A. These devices are intended for use in electrical installations where protection against residual currents and overcurrents is required.