IEC 61009-1 applies to residual current operated circuit-breakers for over current protection for household and similar installations is in its third 2010 edition. It applies for voltage not above 440V A.C. with frequency of 50Hz, 60Hz, or 50/60Hz and rated currents not exceeding 125A. Also, rated short circuit capabilities not exceeding 25kA for operation at 50Hz or 60Hz. Major technical changes to amendment 2 (2006) version include, complete revision of EMC sequences, including the new test T.2.6, already approved in IEC 61543; clarification of RCDs current/time characteristics reported in Tables 2 and 3; and others. A notable change is the movement for some alignment with IEC 60898-1. The intention of these devices is to provide protection against indirect contact, the exposed conductive parts of the installation being connected to an appropriate earth electrode and to protect against overcurrents the wiring installations of buildings and similar applications. Part 1 of this standard is considered the "General Rules" of testing, IEC 61009-2 applies to the general rules to the general rules to RCBO's functionally dependent on line voltage.
