Safety of machinery - Electrical equipment of machines -- Part 1: General requirements (IEC :2005 (MOD))

Transcription

1 Irish Standard I.S. EN :2006 Safety of machinery - Electrical equipment of machines -- Part 1: General requirements (IEC :2005 (MOD)) NSAI 2006 No copying without NSAI permission except as permitted by copyright law.

2 EN :2006/A1:2009 EN :2006/AC:2010 Published: EN : July, November, 1998 EN :2006 EN : June, December, 1997 This document was published under the authority of the NSAI and comes into effect on: ICS number: July, Swift Square, Northwood, Santry Dublin 9 T F E standards@nsai.ie W T F W standards.ie Údarás um Chaighdeáin Náisiúnta na héireann

3 Corrigendum to EN :2006 English version Annex ZZ (informative) Coverage of Essential Requirements of EC Directives This European Standard has been prepared under a mandate given to CENELEC by the European Commission and the European Free Trade Association and within its scope the standard covers only the following essential requirements out of those given in annex I of the EC Directive 2006/42/EC: (for isolation of electrical supplies of machinery) (for access to electrical equipment) (for residual risks of an electrical nature) (e) Compliance with this standard provides one means of conformity with the specified essential requirements of the Directive concerned. WARNING: Other requirements and other EC Directives may be applicable to the products falling within the scope of this standard. February 2010

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5 EUROPEAN STANDARD NORME EUROPÉENNE EN /A1 EUROPÄISCHE NORM February 2009 ICS I.S. EN :2006 English version Safety of machinery - Electrical equipment of machines - Part 1: General requirements (IEC :2005/A1:2008) Sécurité des machines - Equipement électrique des machines - Partie 1: Règles générales (CEI :2005/A1:2008) Sicherheit von Maschinen - Elektrische Ausrüstung von Maschinen - Teil 1: Allgemeine Anforderungen (IEC :2005/A1:2008) This amendment A1 modifies the European Standard EN :2006; it was approved by CENELEC on CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: avenue Marnix 17, B Brussels 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN :2006/A1:2009 E

6 EN :2006/A1: Foreword The text of document 44/575/CDV, future amendment 1 to IEC :2005, prepared by IEC TC 44, Safety of machinery - Electrotechnical aspects, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN :2006 on The following dates were fixed: latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) Annex ZA has been added by CENELEC. Endorsement notice The text of amendment 1:2008 to the International Standard IEC :2005 was approved by CENELEC as an amendment to the European Standard without any modification.

7 I.S. EN : EN :2006/A1:2009 Annex ZA (normative) Normative references to international publications with their corresponding European publications Replace IEC :2001, ISO :1999 and ISO 13850:1996 by the following references: Publication Year Title EN/HD Year IEC (mod) 2005 Low-voltage electrical installations - Part 4-41: Protection for safety - Protection against electric shock ISO Safety of machinery - Safety-related parts of control systems - Part 1: General principles for design ISO Safety of machinery - Emergency stop - Principles for design HD corr. July EN ISO EN ISO

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9 EUROPEAN STANDARD EN NORME EUROPÉENNE EUROPÄISCHE NORM June 2006 ICS Supersedes EN :1997 English version Safety of machinery Electrical equipment of machines Part 1: General requirements (IEC :2005, modified) Sécurité des machines Equipement électrique des machines Partie 1: Règles générales (CEI :2005, modifiée) Sicherheit von Maschinen Elektrische Ausrüstung von Maschinen Teil 1: Allgemeine Anforderungen (IEC :2005, modifiziert) This European Standard was approved by CENELEC on CENELEC members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN :2006 E

10 EN : Foreword The text of the International Standard IEC :2005, prepared by IEC TC 44, Safety of machinery Electrotechnical aspects, together with common modifications prepared by the Technical Committee CENELEC TC 44X, Safety of machinery Electrotechnical aspects, was approved by CENELEC as EN on This European Standard supersedes EN :1997. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) latest date by which the national standards conflicting with the EN have to be withdrawn (dow) NOTE The application of this standard can involve the selection of components and/or parts that are to be integrated with the electrical equipment of a machine in accordance with the instructions and/or specifications of the manufacturers of the components and/or parts. Also, in the context of legislative duties that are applicable to machinery manufacturers within the European Union it is important to recognise that the safety of electrical equipment can involve the use of equipment and services provided by other parties (see 3.54). To assist manufacturers in satisfying these duties it can be necessary for the supplier of the equipment to obtain information about its intended use. This can be facilitated by establishing an agreement between the user and supplier on basic conditions and additional user requirements to enable proper design, application and utilization of the electrical equipment of the machine. An enquiry form that can be used for this purpose is provided in Annex B. Such an agreement is not intended to reduce the level of safety of the electrical equipment provided by this standard.

11 IEC:2005+A1:2008 CONTENTS FOREWORD...6 INTRODUCTION Scope Normative references Definitions General requirements General considerations Selection of equipment Electrical supply Physical environment and operating conditions Transportation and storage Provisions for handling Installation Incoming supply conductor terminations and devices for disconnecting and switching off Incoming supply conductor terminations Terminal for connection to the external protective earthing system Supply disconnecting (isolating) device Devices for switching off for prevention of unexpected start-up Devices for disconnecting electrical equipment Protection against unauthorized, inadvertent and/or mistaken connection Protection against electric shock General Protection against direct contact Protection against indirect contact Protection by the use of PELV Protection of equipment General Overcurrent protection Protection of motors against overheating Abnormal temperature protection Protection against supply interruption or voltage reduction and subsequent restoration Motor overspeed protection Earth fault/residual current protection Phase sequence protection Protection against overvoltages due to lightning and to switching surges Equipotential bonding General Protective bonding circuit Functional bonding Measures to limit the effects of high leakage current...47

12 IEC:2005+A1: Control circuits and control functions Control circuits Control functions Protective interlocks Control functions in the event of failure Operator interface and machine-mounted control devices General Push-buttons Indicator lights and displays Illuminated push-buttons Rotary control devices Start devices Emergency stop devices Emergency switching off devices Enabling control device Controlgear: location, mounting, and enclosures General requirements Location and mounting Degrees of protection Enclosures, doors and openings Access to controlgear Conductors and cables General requirements Conductors Insulation Current-carrying capacity in normal service Conductor and cable voltage drop Flexible cables Conductor wires, conductor bars and slip-ring assemblies Wiring practices Connections and routing Identification of conductors Wiring inside enclosures Wiring outside enclosures Ducts, connection boxes and other boxes Electric motors and associated equipment General requirements Motor enclosures Motor dimensions Motor mounting and compartments Criteria for motor selection Protective devices for mechanical brakes Accessories and lighting Accessories Local lighting of the machine and equipment...84

13 IEC:2005+A1: Marking, warning signs and reference designations General Warning signs Functional identification Marking of equipment Reference designations Technical documentation General Information to be provided Requirements applicable to all documentation Installation documents Overview diagrams and function diagrams Circuit diagrams Operating manual Maintenance manual Parts list Verification General Verification of conditions for protection by automatic disconnection of supply Insulation resistance tests Voltage tests Protection against residual voltages Functional tests Retesting...95 Annex A (normative) Protection against indirect contact in TN-systems...96 Annex B (informative) Enquiry form for the electrical equipment of machines Annex C (informative) Examples of machines covered by this part of IEC Annex D (informative) Current-carrying capacity and overcurrent protection of conductors and cables in the electrical equipment of machines Annex E (informative) Explanation of emergency operation functions Annex F (informative) Guide for the use of this part of IEC Annex G (informative) Comparison of typical conductor cross-sectional areas Bibliography Index Figure 1 Block diagram of a typical machine...10 Figure 2 Example of equipotential bonding for electrical equipment of a machine...43 Figure 3 Method a)...57 Figure 4 Method b)...57 Figure A.1 Typical arrangement for fault loop impedance measurement...99 Figure D.1 Methods of conductor and cable installation independent of number of conductors/cables Figure D.2 Parameters of conductors and protective devices

14 IEC:2005+A1: Table 1 Minimum cross-sectional area of the external protective copper conductor...27 Table 2 Colour-coding for push-button actuators and their meanings...60 Table 3 Symbols for push-buttons...60 Table 4 Colours for indicator lights and their meanings with respect to the condition of the machine...61 Table 5 Minimum cross-sectional areas of copper conductors...68 Table 6 Examples of current-carrying capacity (Iz) of PVC insulated copper conductors or cables under steady-state conditions in an ambient air temperature of +40 C for different methods of installation...70 Table 7 Derating factors for cables wound on drums...72 Table 8 Minimum permitted bending radii for the forced guiding of flexible cables...79 Table 9 Application of the test methods for TN-systems...93 Table 10 Examples of maximum cable length from each protective device to its load...94 Table A.1 Maximum disconnecting times for TN systems...96 Table D.1 Correction factors Table D.2 Derating factors from I z for grouping Table D.3 Derating factors from I z for multicore cables up to 10 mm Table D.4 Classification of conductors Table D.5 Maximum allowable conductor temperatures under normal and short-circuit conditions Table F.1 Application options Table G.1 Comparison of conductor sizes...115

15 IEC:2005+A1:2008 INTERNATIONAL ELECTROTECHNICAL COMMISSION SAFETY OF MACHINERY ELECTRICAL EQUIPMENT OF MACHINES Part 1: General requirements FOREWORD 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as IEC Publication(s) ). Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and nongovernmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations. 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus of opinion on the relevant subjects since each technical committee has representation from all interested IEC National Committees. 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any misinterpretation by any end user. 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter. 5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any equipment declared to be in conformity with an IEC Publication. 6) All users should ensure that they have the latest edition of this publication. 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of its technical committees and IEC National Committees for any personal injury, property damage or other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications. 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable for the correct application of this publication. 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights. IEC shall not be held responsible for identifying any or all such patent rights. International Standard IEC has been prepared by technical committee 44: Safety of machinery Electrotechnical aspects. This edition constitutes a technical revision. It incorporates material from the fourth edition, amended to provide general requirements for machines, including mobile machines and complex (for example large) machine installations. This consolidated version of IEC consists of the fifth edition (2005) [documents 44/494/FDIS and 44/502/RVD] and its amendment 1 (2008) [documents 44/575/CDV and 44/580/RVC]. The technical content is therefore identical to the base edition and its amendment and has been prepared for user convenience. It bears the edition number 5.1.

16 IEC:2005+A1: A vertical line in the margin shows where the base publication has been modified by amendment 1. This publication has been drafted in accordance with the ISO/IEC Directives, Part 2. The following differences exist in some countries: 4.3.1: The voltage characteristics of electricity supplied by public distribution systems in Europe are given in EN 50160: : Exception is not allowed (USA). 5.1: TN-C systems are not permitted in low-voltage installations in buildings (Norway). 5.2: Terminals for the connection of the protective earthing conductors may be identified by the colour green, the letters G or GR or GRD or GND, or the word ground or grounding, or with the graphical symbol IEC (DB: ) or any combination (USA) b), b), : TT power systems are not allowed (USA) : Disconnection of the neutral conductor is mandatory in a TN-S system (France and Norway) : Third paragraph: distribution of a neutral conductor with an IT system is not allowed (USA and Norway) : Maximum nominal a.c. control circuit voltage is 120 V (USA). 12.2: Only stranded conductors are allowed on machines, except for 0,2 mm 2 solid conductors within enclosures (USA). 12.2: The smallest power circuit conductor allowed on machines is 0,82 mm 2 (AWG 18) in multiconductor cables or in enclosures (USA). Table 5: Cross-sectional area is specified in ANSI/NFPA 79 using American Wire Gauge (AWG) (USA). See Annex G : For the protective conductor, the colour identification GREEN (with or without YELLOW stripes) is used as equivalent to the bicolour combination GREEN-AND- YELLOW (USA and Canada) : The colour identification WHITE or GREY is used for earthed neutral conductors instead of the colour identification BLUE (USA and Canada) : First paragraph: Maximum value between conductors 150 V (USA) : 2nd paragraph, 5th bullet: The full load current rating of lighting circuits does not exceed 15 A (USA). 16.4: Nameplate marking requirements (USA). IEC consists of the following parts, under the general title Safety of machinery Electrical equipment of machines: Part 1: General requirements Part 11: Requirements for HV equipment for voltages above V a.c. or V d.c. and not exceeding 36 kv Part 31: Particular safety and EMC requirements for sewing machines, units and systems Part 32: Requirements for hoisting machines Part 33: Particular requirements for semiconductor manufacturing equipment 1 1 Under consideration.

17 I.S. EN : IEC:2005+A1:2008 The committee has decided that the contents of the base publication and its amendments will remain unchanged until the maintenance result date indicated on the IEC web site under " in the data related to the specific publication. At this date, the publication will be reconfirmed, withdrawn, replaced by a revised edition, or amended.

18 IEC:2005+A1: INTRODUCTION This part of IEC provides requirements and recommendations relating to the electrical equipment of machines so as to promote: safety of persons and property; consistency of control response; ease of maintenance. More guidance on the use of this part of IEC is given in Annex F. Figure 1 has been provided as an aid to the understanding of the inter-relationship of the various elements of a machine and its associated equipment. Figure 1 is a block diagram of a typical machine and associated equipment showing the various elements of the electrical equipment addressed in this part of IEC Numbers in parentheses ( ) refer to Clauses and Subclauses in this part of IEC It is understood in Figure 1 that all of the elements taken together including the safeguards, tooling/fixturing, software, and the documentation, constitute the machine, and that one or more machines working together with usually at least one level of supervisory control constitute a manufacturing cell or system.

19 IEC:2005+A1:2008 Physical environment (4.4) Warning signs, item designation (Clause 16) Technical documentation (Clause 17) System/cell controller Supply disconnecting device (5.3) Protection against electrical shock (Clause 6) Power supply (4.3) PE (External protective conductor connection) Conductors and cables (Clause 12) Wiring practices (Clause 13) Testing (Clause 18) Motor control equipment Protection of equipment (Clause 7) Earth (PE) terminal (5.2) Protective bonding circuit (8.2) Control circuits and control functions (Clause 9) Emergency stop function ( ) Controlgear (Clause 11) Accessories and lighting (Clause 15) Programmable controller Input/output interface Data link Emergency stop device (10.7) Operator control station (Clause 10) Safeguards and warning devices Motors (Clause 14) and transducers Actuators and sensors Processing equipment IEC 1388/05 Figure 1 Block diagram of a typical machine

20 IEC:2005+A1: SAFETY OF MACHINERY ELECTRICAL EQUIPMENT OF MACHINES Part 1: General requirements 1 Scope This part of IEC applies to the application of electrical, electronic and programmable electronic equipment and systems to machines not portable by hand while working, including a group of machines working together in a co-ordinated manner. NOTE 1 This part of IEC is an application standard and is not intended to limit or inhibit technological advancement. NOTE 2 In this part of IEC 60204, the term electrical includes electrical, electronic and programmable electronic matters (i.e. electrical equipment means electrical, electronic and programmable electronic equipment). NOTE 3 In the context of this part of IEC 60204, the term person refers to any individual and includes those persons who are assigned and instructed by the user or his agent(s) in the use and care of the machine in question. The equipment covered by this part of IEC commences at the point of connection of the supply to the electrical equipment of the machine (see 5.1). NOTE 4 The requirements for the electrical supply installation in buildings are given in the IEC series. This part of IEC is applicable to the electrical equipment or parts of the electrical equipment that operate with nominal supply voltages not exceeding V for alternating current (a.c.) and not exceeding V for direct current (d.c.), and with nominal supply frequencies not exceeding 200 Hz. NOTE 5 For higher voltages, see IEC This part of IEC does not cover all the requirements (for example guarding, interlocking, or control) that are needed or required by other standards or regulations in order to protect persons from hazards other than electrical hazards. Each type of machine has unique requirements to be accommodated to provide adequate safety. This part specifically includes, but is not limited to, the electrical equipment of machines as defined in NOTE 6 Annex C lists examples of machines whose electrical equipment can be covered by this part of IEC This part of IEC does not specify additional and special requirements that can apply to the electrical equipment of machines that, for example: are intended for use in open air (i.e. outside buildings or other protective structures); use, process, or produce potentially explosive material (for example paint or sawdust); are intended for use in potentially explosive and/or flammable atmospheres; have special risks when producing or using certain materials; are intended for use in mines;

21 IEC:2005+A1:2008 are sewing machines, units, and systems (which are covered by IEC ); are hoisting machines (which are covered by IEC ). Power circuits where electrical energy is directly used as a working tool are excluded from this part of IEC Normative references The following referenced documents are indispensable for the application of this part of IEC For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC , Rotating electrical machines Part 1: Rating and performance IEC , Rotating electrical machines Part 5: Degrees of protection provided by the integral design of rotating electrical machines (IP code) Classification IEC , Rotating electrical machines Part 11: Thermal protection IEC , Dimensions and output series for rotating electrical machines Part 1: Frame numbers 56 to 400 and flange numbers 55 to IEC , Dimensions and output series for rotating electrical machines Part 2: Frame numbers 355 to and flange numbers to IEC 60073:2002, Basic and safety principles for man-machine interface, marking and identification Coding principles for indicators and actuators IEC :1999, Plugs, socket-outlets, and couplers for industrial purposes Part 1: General requirements IEC :2005, Low-voltage electrical installations Part 4-41: Protection for safety Protection against electric shock IEC :2001, Electrical installations of buildings Part 4-43: Protection for safety Protection against overcurrent IEC :2001, Electrical installations of buildings Part 5-52: Selection and erection of electrical equipment Wiring systems IEC :2002, Electrical installations of buildings Part 5-53: Selection and erection of electrical equipment Isolation, switching and control IEC :2002, Electrical installations of buildings Part 5-54: Selection and erection of electrical equipment Earthing arrangements, protective conductors and protective bonding conductors IEC :2001, Electrical installations of buildings Part 6-61: Verification Initial verification IEC DB:2002 2, Graphical symbols for use on equipment 2 DB refers to the IEC on-line database.

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