GB/Z 22721-2008Guidance for the correct use of residual current-operated protective devices (RCDs) for household and similar use (English PDF)

Foreword

This technical document is equivalent to the use of IEC /T R62350..2006 "Correct use of household and similar residual current protection circuit (RCD) Guide ", in accordance with the format GB/T 1.1-2000 requirements, made editorial changes.

Appendices A, B, C and D of this guidance document are informative appendices.

Introduction

The purpose of this guidance document is to provide designers, manufacturers, and installers with a view to optimizing the long-term availability of protection provided by the RCD As well as users and guides and information for maintenance personnel responsible for the selection, installation and use of RCDs in fixed electrical installations.

In the last 40 years, the IEC Technical Committee (inter alia, within SC23E) has compared and used the data collected by manufacturers, laboratories, installers, The experience accumulated by users and installers, the IEC has made progress on RCD reliability by revising the RCD standard. Around this goal Standard, the technical requirements and tests of these IEC standards have been added and improved. When SC23E decided to introduce such as analog RCD aging 28 days environmental testing and other technical requirements, it has made considerable progress.

The user, installer, and other committees of the IEC are required to inform the IEC that while compared to the earlier RCD, while meeting the relevant RCD standards RCD reliability has been substantially improved, but the availability of protection provided by RCDs is related to many parameters, not only with the RCD itself Off, but also with the installation and use of the environment.

This guidance document comprehensively identifies and describes the main factors affecting the availability of RCD protection in order to further promote RCD Operate reliably and enhance the valuable protection provided by this appliance. In order to implement this step by step through the publication of the technical guide The work already done by the SC23E will continue to monitor this important area (reliability).

Additional Information. During the meeting between TC64 and SC23E officials, confirm that this Guidance Document does not conflict with the TC64 standard There are contradictions, and the purpose of this guidance document is to provide information for better understanding and proper use of the RCD.

1 Scope

This technical note provides the residual current operated protective device (RCD) provided by the national standard for household and similar purposes A summary of the availability of protection. This guidance document highlights key parameters that affect the availability of protection and provides guidance on Information on how to install and use the RCD and the environmental conditions after installation.

This Guidance Document gives information on the availability of protection in fixed electrical installations and how high (during installation and maintenance)

General information about the level of protection availability available; the development of this technical guidance document is useful to all standardization technical committees, installers, inspections And users.

Note 1. The term RCD is a general purpose family of products that can be automatically switched off when the residual current equals or exceeds the rated residual operating current I delta n of the RCD the term. This general term applies generally to. RCCB --- residual current circuit breaker without over-current protection; RCBO --- residual current circuit breaker with overcurrent protection; SRCD --- outlet residual current electrical appliances; PRCD --- mobile residual current appliances.

The difference between RCCB and RCBO is that RCBO has added over-current protection function, while RCCB has no protection against over-current.

NOTE 2 PRCDs are not considered part of a fixed electrical installation and are therefore not covered by this technical document.

2 Normative references

The following documents contain provisions which, through reference in this Guidance Document, become the provisions of this Guidance Note document. All dated Reference documents, all subsequent amendments (not including errata content), or revisions do not apply to this guidance document, however, drums Recipients of the agreement based on this guidance document are encouraged to study whether the latest versions of these documents are applicable. All undated references The latest version of this document applies to this guidance document.

GB 16895 (all parts) building electrical installations

GB/T 16895.16-2002 Electrical installations in buildings - Part 4. Safety protection Chapter 44. Overvoltage protection Regulation 444 Section. Electromagnetic Interference (EMI) Protection of Building Electrical Installations (IEC 60364-4-444.:1996, IDT)

GB/T 16895.18-2002 Electrical installations in buildings - Part 5. Selection and installation of electrical equipment Chapter 51. General regulations Then (IEC 60364-5-51.:1997, IDT)

GB 16916 (all parts) Residual current operated circuit breakers (RCCB) for household and similar purposes without overcurrent protection

GB 16916.1-2003 Residual current operated circuit breakers without overcurrent protection (RCCB) for household and similar purposes Part 1 Points. General rules (IEC 61008-1.:1996, MOD)

GB 16917 (all parts) Residual current operated circuit breaker (RCBO) with overcurrent protection for household and similar purposes

GB 16917.1-2003 Residual current operated circuit breakers (RCBO) with overcurrent protection for household and similar purposes Part 1 Points. General rules (IEC 61009-1.:1996, MOD)

GB/T 17045-2006 Shock protection devices and equipment common part (IEC 61140.:2001, IDT)

GB 18499-2008 Residual Current Actuators (RCDs) for Household and Similar Use Electromagnetic Compatibility (IEC 61543. 1995, IDT)