IEC 61009-2-2 Residual Current Operated Circuit Breakers (RCBOs) with Integrated Overcurrent Protection for Household and Similar Uses - Part 2-2: Applicability of General Rules to Functionally Connected RCBOs

The IEC 61009-2-2 standard published by the International Electrotechnical Commission (IEC) applies to residual current-operated circuit breakers with integrated overcurrent protection for household and similar uses. Circuit breakers operating with residual current with overcurrent protection within the scope of this standard are designed for frequencies of 50 Hz, 60 Hz and voltages not exceeding 440 Volts alternating current, currents not exceeding 125 Amperes and rated short circuit capacities not exceeding 25 thousand Amps.

The IEC 61009-2-2 standard is valid together with the IEC 61009-1 standard and contains specific requirements, tests and test sequences for certification purposes.

Essentially, this part of the IEC 61009 standard contains the definitions, requirements and tests of all types of surge-protected residual current-operated circuit breakers, and for applicability to a particular type, this section is designed in two ways:

• Part 2-1: Applicability of the general rules to functionally line voltage independent RCBOs
• Part 2-2: Applicability of general rules to functionally connected RCBOs to line voltage

The IEC 61009-2-2 standard does not apply to circuit breakers such as:

• Residual current-operated circuit breakers with over-current protection to protect motors
• Circuit breakers operating with residual current with overcurrent protection, whose current setting can be adjusted so that the user can access it in normal service

The requirements of this standard apply to normal environmental conditions. Therefore, additional requirements are required for circuit breakers operating with residual current with overcurrent protection used in places with severe environmental conditions.

The abbreviation RCBO is formed from the initials of an English expression meaning residual current operated circuit breaker with overcurrent protection.

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