Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs) - Part 1: General rules (IEC 23E/1223/CD:2020); Text in German and English
Abstract
This document gives general requirements and tests for residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (hereafter referred to as RCCBs), for rated voltages not exceeding 440 V AC. with rated frequencies of 50 Hz, 60 Hz or 50/60 Hz and rated currents not exceeding 125 A, intended principally for protection against shock hazard. These devices are intended to protect people against indirect contact, the exposed conductive parts of the installation being connected to an appropriate earth electrode. They are also intended to be used to provide protection against fire hazards due to a persistent earth fault current, without the operation of the overcurrent protective device. RCCBs having a rated residual operating current not exceeding 30 mA are also used as a means for additional protection in the case of failure of the protective means against electric shock. This document applies to devices performing simultaneously the functions of detection of the residual current, of comparison of the value of this current with the residual operating value and of opening of the protected circuit when the residual current exceeds this value. NOTE 1 The requirements for RCCBs are in line with the general requirements of IEC 60755. NOTE 2 RCCBs can be submitted for certification purposes. NOTE 3 Installation and application rules of RCCBs are given in the IEC 60364 series. RCCBs are essentially intended to be operated by uninstructed persons and designed not to require maintenance. The requirements of this document apply for normal environmental conditions (see 7.1). Additional requirements may be necessary for RCCBs used in locations having severe environmental conditions. They are intended for use in an environment with pollution degree 2 (see 7.3). NOTE 4 For environments with higher pollution degrees, enclosures giving the appropriate degree of protection could be used. NOTE 5 For RCCBs having a degree of protection higher than IP20 special constructions can be required. RCCBs are suitable for isolation. Special precautions (e.g. surge protective devices) may be necessary when excessive overvoltages are likely to occur on the supply side (for example in the case of supply through overhead lines) (see IEC 60364-4-44). RCCBs, with the exception of those with an uninterrupted neutral, are suitable for use in IT systems. RCCBs of the general type are resistant to unwanted tripping, including the case where surge voltages (as a result of switching transients or induced by lightning) cause loading currents in the installation without occurrence of flashover. RCCBs of type S are considered to be sufficiently proof against unwanted tripping even if the surge voltage causes a flashover and a follow-on current occurs. NOTE 6 Surge protective devices installed downstream of the general type of RCCBs and connected in common mode can cause unwanted tripping. Supplementary requirements may be necessary for RCCBs of the plug-in type. Particular requirements are necessary for RCCBs incorporated in or intended only for association with plugs and socket-outlets or with appliance couplers for household and similar purposes. RCCBs intended to be used at frequencies other than 50 Hz or 60 Hz. For RCCBs incorporated in, or intended only for association with socket-outlets, the requirements of this document may be used, as far as applicable, in conjunction with the requirements of IEC 60884-1 or the national requirements of the country where the product is placed on the market. NOTE 7 Residual current-operated protective devices (RCDs) incorporated in, or intended only for association with socket-outlets, can either meet IEC 62640 or this document. NOTE 8 In DK, plugs and socket-outlets are in accordance with the requirements of the heavy current regulations section 107. NOTE 9 In the UK, the plug part associated with a RCCB complies with BS 1363-1 and the socket-outlet(s) associated with a RCCB complies with BS 1363-2. In the UK, the plug part and the socket-outlet(s) associated with a RCCB need not comply with any IEC 60884-1 requirements. This document does not apply to: RCCBs the current setting of which is adjustable without a tool. RCCBs including batteries. This document is not intended to be used alone and it is intended to be used in conjunction with the relevant product standard IEC 61008-2-1 or IEC 61008-2-2.
Begin
2021-02-22
Planned document number
DIN IEC 61008-1
Project number
02230091
Responsible national committee
DKE/UK 541.3 - Fehlerstrom-Schutzeinrichtungen
draft standard
Residual current operated circuit-breakers without integral overcurrent protection for household and similar uses (RCCBs) - Part 1: General rules (IEC 23E/1223/CD:2020); Text in German and English
2021-10
Order from DIN Media
