This Indian Standard which is identical to IEC 1543 : 1995`Residual current-operated protective devices (RCDs) for householdand similar use - Electromagnetic compatibility issued by theInternational Electrotechnical Commission was adopted by the Bureauof Indian Standards on the recommendations of the Low VoltageSwitchgear and Controlgear Sectional Committee (ET 07) and approvalof the Electrotechnical Division Council. The text of the IEC standard has been approved as suitable for publication as Indian Standard without deviations. This standard includes definitions, standard electromagnetic conditions, conditions of operation in service and electromagnetic tests necessary for devices providing residual current protection. It is intended to apply in conjunction with present and future Indian Standards on residual current devices incorporating overcurrent protection. In the adopted standard, certain terminology and conventions are not,identical with those used in Indian Standards. Attention is specially drawn to the following: a) Wherever the words ‘International Standard’ appear, referring to this standard, they should be read as ‘Indian Standard’. b) Comma (,) has been used as a decimal marker while in Indian Standard, the current practice is to use a point (.) as the decimal marker.

IEC 1543:1995 -