IEC TR 60755:2008
General requirements for residual current operated protective devices

Standard No.

IEC TR 60755:2008

Release Date

2008

Published By

International Electrotechnical Commission (IEC)

Latest

IEC TR 60755:2008

Replace By

IEC 60755:2017

Replace

IEC 23E/635/DTR:2007 IEC 60755:1983 IEC 60755 AMD 1:1988 IEC 60755 AMD 2:1992

Scope

The requirements of this technical report apply to residual current operated protective devices (hereinafter referred to as “residual current devices” (RCD)) for rated voltages not exceeding 440 V a.c., intended primarily for protection against shock hazard. They are intended to be used by technical committees when drafting product standards and apply only if they are incorporated or are referred to in the relevant standards. This report is not intended to be used as a stand-alone standard, for example, for certification. NOTE 1 This technical report may also be used as a guide for residual current devices of rated voltages up to 1 000 V, a.c. It applies to – a single device which detects a residual current (see 3.3.2), compares it to a reference value (see 3.3.3) and opens the protected circuit when the residual current exceeds this reference value (see 3.3.4); – an association of devices, each one of them performing separately one or two of the above-mentioned functions, but acting together in order to accomplish all three functions. Particular requirements may be necessary for devices intended for accomplishing only one or two of the above three functions. This report applies for conditions as stated in Clause 7. For other conditions, additional requirements may be necessary. Residual current devices are intended to protect persons and livestock against harmful effects of electric shock due to contact with exposed conductive parts by automatic disconnection of supply in accordance with IEC 61140 and IEC 60364-4-41. NOTE 2 In this context “harmful effects” include the risk of occurrence of heart fibrillation. In accordance with IEC 60364-5-53, residual current devices with a rated residual operating current not exceeding 300 mA may also be used to provide protection against fire hazards due to a persistent earth fault current. In accordance with IEC 60364-4-41, residual current devices with a rated residual operating current not exceeding 30 mA may also be used for additional protection in case of failure of the basic protective provisions or carelessness of the user of the installation or equipment. For residual current devices performing additional functions, this technical report applies together with the relevant standard covering the additional functions; for example, when residual current devices incorporate a circuit-breaker it should comply with the relevant circuit-breaker standard. Supplementary or particular requirements may be necessary, for example, for – residual current devices intended for use by uninstructed persons; – socket-outlets, plugs, adapters and couplers incorporating residual current devices. This technical report states – the definitions of terms used for residual current devices (Clause 3) ; – the classification of residual current devices (Clause 4); – the characteristics of residual current devices (Clause 5); – the preferred values of the operating and influencing quantities (5.4); – the marking and information to be provided for residual current devices (Clause 6); – the standard conditions for installation and operation in service (Clause 7); – the requirements for construction and operation (Clause 8); – the list of minimum requirements to be tested (Clause 9). NOTE 3 Devices having a residual current function for specific purposes other than those mentioned above (for example, motor protection) are not covered by this technical report.

IEC TR 60755:2008 Referenced Document

• IEC 60038 Amendment 1 - IEC standard voltages*， 2021-12-15 Update
• IEC 60050-411:1996 International Electrotechnical Vocabulary - Chapter 411: Rotating machines
• IEC 60050-426:1990 International electrotechnical vocabulary; chapter 426: electrical apparatus for explosive atmospheres
• IEC 60050-441:1984 International Electrotechnical Vocabulary. Part 441 : Chapter 441: Switchgear, controlgear and fuses
• IEC 60050-442:1998 International Electrotechnical Vocabulary - Part 442: Electrical accessories
• IEC 60050-471:2007 International Electrotechnical Vocabulary - Part 471: Insulators
• IEC 60998-1 Interpretation sheet 01 - Connecting devices for low-voltage circuits for household and similar purposes - Part 1: General requirements; Interpretation of Clause 18
• IEC 61140 Protection against electric shock — Common aspects for installation and equipment*， 2016-01-07 Update

IEC TR 60755:2008 history

• 2008 IEC TR 60755:2008 General requirements for residual current operated protective devices
• 1970 IEC TR 60755:1983/AMD2:1992 Amendment 2 - General requirements for residual current operated protective devices
• 1970 IEC TR 60755:1983/AMD1:1988 Amendment 1 - General requirements for residual current operated protective devices
• 1983 IEC TR 60755:1983 General Requirements for Residual Current Operated Protective Devices (Edition 1.0; Amendment 1: 01/1988; Amendment 2: 05/1992)

IEC TR 60755:2008 General requirements for residual current operated protective devices has been changed from IEC 60755:1983 General requirements for residual current operated protective devices.

IEC TR 60755:2008 General requirements for residual current operated protective devices was changed to IEC 60755:2017 General safety requirements for residual current operated protective devices.