1、BRITISH STANDARDBS EN 60947-5-8:2006Low-voltage switchgear and controlgear Part 5-8: Control circuit devices and switching elements Three-position enabling switchesThe European Standard EN 60947-5-8:2006 has the status of a British StandardICS 29.130.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g
2、56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 60947-5-8:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 January 2007 BSI 2
3、007ISBN 978 0 580 50048 0National forewordThis British Standard was published by BSI. It is the UK implementation of EN 60947-5-8:2006. It is identical with IEC 60947-5-8:2006.The UK participation in its preparation was entrusted by Technical Committee PEL/17, Switchgear, controlgear, and HV-LV co-o
4、rdination, to Subcommittee PEL/17/2, Low voltage switchgear and controlgear.A list of organizations represented on PEL/17/2 can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct appli
5、cation.Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 60947-5-8 NORME EUROPENNE EUROPISCHE NORM December 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen
6、de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60947-5-8:2006 E ICS 29.130.20 Engl
7、ish version Low-voltage switchgear and controlgear Part 5-8: Control circuit devices and switching elements - Three-position enabling switches (IEC 60947-5-8:2006) Appareillage basse tension Partie 5-8: Appareils et lments de commutation pour circuit de commande - Interrupteurs de commande de valida
8、tion trois positions (CEI 60947-5-8:2006) Niederspannungsschaltgerte Teil 5-8: Steuergerte und Schaltelemente -Drei-Stellungs-Zustimmschalter (IEC 60947-5-8:2006) This European Standard was approved by CENELEC on 2006-11-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulatio
9、ns 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 Eu
10、ropean 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 ar
11、e 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, Swede
12、n, Switzerland and the United Kingdom. Foreword The text of document 17B/1492/FDIS, future edition 1 of IEC 60947-5-8, prepared by SC 17B, Low-voltage switchgear and controlgear, of IEC TC 17, Switchgear and controlgear, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as E
13、N 60947-5-8 on 2006-11-01. 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) 2007-08-01 latest date by which the national standards conflicting with the EN have to be withdrawn
14、dow) 2009-11-01 This part of EN 60947 should be used in conjunction with EN 60947-1:2004 and EN 60947-5-1:2004. The provisions of the general rules, IEC 60947-1, are applicable to this part of EN 60947, where specifically called for. General rules, clauses and subclauses thus applicable, as well as
15、 tables, figures and annexes are identified by a reference to IEC 60947-1, for example 1.2.3 or Annex A of IEC 60947-1. Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60947-5-8:2006 was approved by CENELEC as a European Standard without any modifi
16、cation. _ EN 60947-5-8:2006 2 3 EN 60947-5-8:2006 CONTENTS 1 General4 1.1 Scope4 1.2 Normative references 4 2 Terms and definitions .5 3 Classification6 3.1 Contact elements.6 3.2 Three-position enabling switch.6 4 Characteristics .6 4.1 Summary of characteristics6 4.2 Type of three-position enablin
17、g switch .6 4.3 Rated and limiting values for switching elements6 4.4 Utilization categories for switching elements 7 4.5 Vacant.7 4.6 Vacant.7 4.7 Vacant.7 4.8 Vacant.7 4.9 Switching overvoltages 7 4.10 Electrically separated contact elements7 5 Product information 7 5.1 Nature of information .7 5.
18、2 Marking .8 5.3 Instructions for installation, operation and maintenance8 5.4 Additional information 8 6 Normal service, mounting and transport conditions8 6.3 Mounting .8 7 Constructional and performance requirements.9 7.1 Constructional requirements 9 7.2 Performance requirements.11 8 Tests12 8.1
19、 Kinds of test 12 8.2 Compliance with constructional requirements .13 8.3 Performance13 Annex A (informative) Example of an enabling device incorporating a three-position enabling switch.19 Annex ZA (normative) Normative references to international publications with their corresponding European publ
20、ications21 Bibliography .20 Figure 1 Operation of three-position enabling switches .10 Figure 2 Operating force, travel and contact status .11 Figure A.1 Enabling device.19 EN 60947-5-8:2006 4 LOW-VOLTAGE SWITCHGEAR AND CONTROLGEAR Part 5-8: Control circuit devices and switching elements Three-posit
21、ion enabling switches 1 General 1.1 Scope This part of IEC 60947 specifies requirements for three-position enabling switches. These switches are used as components of enabling devices described in 10.9 of IEC 60204-1 to provide signals that, a) when activated, allow machine operation to be initiated
22、 by a separate start control, and b) when de-activated, i) initiate a stop function, and ii) prevent initiation of machine operation. NOTE 1 The enabling control function is described in 9.2.6.3 of IEC 60204-1. NOTE 2 This standard does not deal with enabling devices. This standard does not apply to
23、 three-position enabling switches for non-electrical control circuits, for example hydraulic, pneumatic; enabling switches without three-position mechanism; emergency stop devices (see IEC 60947-5-5). 1.2 Normative references The following referenced documents are indispensable for the application
24、of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60068-2-1:1990, Environmental testing Part 2: Tests Test A: Cold Amendment 1 (1993) Amendment 2 (1994) IEC 60068-2-2:1
25、974, Environmental testing Part 2: Tests Test B: Dry heat Amendment 1 (1993) Amendment 2 (1994) IEC 60068-2-6:1995, Environmental testing Part 2: Tests Test Fc: Vibration (sinusoidal) IEC 60068-2-27:1987, Environmental testing Part 2: Tests Test Ea and guidance: Shock 5 EN 60947-5-8:2006 IEC 60204-1
26、2005, Safety of machinery Electrical equipment of machines Part 1: General requirements IEC 60947-1:2004, Low-voltage switchgear and controlgear Part 1: General rules IEC 60947-5-1:2003, Low-voltage switchgear and controlgear Part 5-1: Control circuit devices and switching elements Electromechanica
27、l control circuit devices 2 Terms and definitions For the purposes of this document, the relevant definitions given in Clause 2 of IEC 60947-1 and Clause 2 of IEC 60947-5-1 apply, with the following additional definitions. Alphabetical index of definitions Reference A Actuating system (of a three-po
28、sition enabling switch) . 2.3 Actuator (of a three-position enabling switch) 2.4 Auxiliary contact . 2.5 E Enabling device 2.1 T Three-position enabling switch 2.2 2.1 enabling device manually operated control device used in conjunction with a start control and which, when continuously actuated, all
29、ows a machine operation 2.2 three-position enabling switch switch having three sequential actuator positions, in which the contacts are closed when the actuator is in the mid position (partly depressed) and are open when the actuator is in the rest (not pressed) position and in the fully depressed p
30、osition 2.3 actuating system (of a three-position enabling switch) mechanical parts which transmit the actuating force to the contact elements IEV 441-15-21, modified 2.4 actuator (of a three-position enabling switch) part of the actuating system which is actuated by a part of the human body EXAMPLE
31、 a button. EN 60947-5-8:2006 6 2.5 auxiliary contact contact of a three-position enabling switch that provides an auxiliary function NOTE Auxiliary contacts may be normally open and/or normally closed. 3 Classification 3.1 Contact elements Subclause 3.1 of IEC 60947-5-1 applies. 3.2 Three-position e
32、nabling switch Three-position enabling switches may be classified according to the contact element and the nature of the actuating system, e.g. three-position enabling switches, form B. 4 Characteristics 4.1 Summary of characteristics Subclause 4.1 of IEC 60947-5-1 applies. 4.1.1 Operation of a cont
33、rol switch Subclause 4.1.1 of IEC 60947-5-1 applies. 4.1.1.1 Normal conditions of use Subclause 4.1.1.1 of IEC 60947-5-1 applies. 4.1.1.2 Abnormal conditions of use Subclause 4.1.1.2 of IEC 60947-5-1 applies. 4.2 Type of three-position enabling switch 4.2.1 Examples of devices incorporating three-po
34、sition enabling switches push-button enabling devices; grip actuated enabling devices; foot actuated enabling devices; etc. 4.2.2 Number of poles The number of poles shall be stated by the manufacturer. 4.2.3 Kind of current Alternating current or direct current. 4.3 Rated and limiting values for sw
35、itching elements Subclause 4.3 of IEC 60947-5-1 applies. 7 EN 60947-5-8:2006 4.4 Utilization categories for switching elements Subclause 4.4 of IEC 60947-5-1 applies. 4.5 Vacant 4.6 Vacant 4.7 Vacant 4.8 Vacant 4.9 Switching overvoltages Subclause 4.9 of IEC 60947-1 applies. 4.10 Electrically separa
36、ted contact elements Subclause 4.10 of IEC 60947-5-1 applies. 5 Product information 5.1 Nature of information The following information shall be given by the manufacturer: Identification a) The manufacturers name or trade mark. b) A type designation or serial number that makes it possible to get the
37、 relevant information concerning the switching element (or the entire control switch) from the manufacturer. c) “IEC 60947-5-8” if the manufacturer claims compliance with this standard. d) Three-position enabling switches shall be indelibly and legibly marked by the symbol: NOTE If it is not possibl
38、e to affix the marking to the switch due to size constraints, then the symbol may be put in the instructions for installation, operation and maintenance. Basic rated values and utilization e) Actuating forces and operational stroke. f) Rated operational voltages (see 4.3.1.1 of IEC 60947-5-1). g) Ut
39、ilization category and rated operational currents at the rated operational voltages of the switching element. h) Rated insulation voltage (see 4.3.1.2 of IEC 60947-5-1). i) Rated impulse withstand voltage Uimpin accordance with 4.3.1.3 of IEC 60947-1. a) j) IP code (see 5.1 and Annex C of IEC 60947-
40、1). k) Pollution degree (see 6.1.3.2 of IEC 60947-5-1). l) Type and maximum ratings of short-circuit protective device (see 8.3.4.3 of IEC 60947-5-1). EN 60947-5-8:2006 8 m) Conditional short-circuit current if less than 1 000 A. n) Indication of contact elements of same polarity. o) Mechanical and/
41、or electrical durability. 5.2 Marking 5.2.1 General Marking of data specified in items a), b), c) and d) of 5.1 is mandatory on the nameplate of the three-position enabling switch in order to permit the complete information to be obtained from the manufacturer. Marking shall be indelible and easily
42、legible, and shall not be placed on screws and easily removable parts. Whenever space permits, data under items e) to o) of 5.1 shall be included on the nameplate, or on the three-position enabling switch or otherwise in the manufacturers published literature. 5.2.2 Terminal identification and marki
43、ng Subclause 7.1.7.4 of IEC 60947-1 applies. 5.2.3 Functional markings To avoid confusion with emergency stop devices, the actuator of an enabling switch shall not be coloured RED (see also IEC 60204-1). 5.3 Instructions for installation, operation and maintenance Subclause 5.3 of IEC 60947-1 applie
44、s. 5.4 Additional information Subclause 5.4 of IEC 60947-5-1 applies. 6 Normal service, mounting and transport conditions Clause 6 of IEC 60947-1 applies with the following additions. 6.1.3.2 Pollution degree Unless otherwise stated by the manufacturer, a three-position enabling switch is intended f
45、or installation under environmental conditions of pollution degree 3. However, other pollution degrees may apply, depending upon the micro-environment. 6.3 Mounting Means shall be provided to allow the three-position enabling switch to be securely installed in its intended mounting position. 9 EN 60
46、947-5-8:2006 7 Constructional and performance requirements 7.1 Constructional requirements Subclause 7.1 of IEC 60947-1 applies except for 7.1.1, 7.1.2, 7.1.6, 7.1.8 and 7.1.12, and with the following additions. 7.1.1 Materials Subclause 7.1.1 of IEC 60947-5-1 applies. 7.1.2 Current-carrying parts a
47、nd their connections Subclause 7.1.2 of IEC 60947-5-1 applies. 7.1.3 Clearances and creepage distances Subclause 7.1.3 of IEC 60947-5-1 applies. 7.1.4.3 Actuating force (or moment) The force (or moment) required to operate the actuator shall be compatible with the intended application, taking into a
48、ccount the size of the actuator, the type of enclosure or panel, the environment of the installation and the use for which it is intended. 7.1.7 Class II three-position enabling switches Subclause 7.1.7 of IEC 60947-5-1 applies. 7.1.8 Requirements for three-position enabling switches with integrally
49、 connected cables Subclause 7.1.8 of IEC 60947-5-1 applies. 7.1.9 Three-position operation The three positions are designated as follows (see Figure 2): position 1: OFF state of the contact (actuator is not pressed); position 2: ON state of the contact (actuator is pressed to the normal enabling position); position 3: OFF state of the contact (actuator is fully depressed). The three-position enabling switch pressed to position 2 shall return to position 1 when rel
