IEC 62640:2011适用于包含在双极插座中或专门用于双极插座的剩余电流操作装置（RCD），无论家用或类似用途有无接地触点（SRCD:插座剩余电流装置）。根据本标准，SRCD拟用于单相系统，如相对中性线或相对相或相对地中间导体。SRCD仅用于在SRCD下游提供额外保护。SRCD适用于故障保护（间接接触保护）已在SRCD上游得到保证的电路。

IEC 62640:2011 applies to residual current-operated devices (RCD) incorporated in, or specifically intended for use with two pole socket-outlets, with or without earthing contact for household and similar uses (SRCD: socket-outlet residual current devices). SRCDs, according to this standard, are intended to be used in single phase systems such as phase to neutral or phase to phase or phase to earthed middle conductor. SRCDs are only intended to provide additional protection downstream of the SRCD. SRCDs are intended for use in circuits where the fault protection (indirect contact protection) is already assured upstream of the SRCD.