1、BRITISH STANDARD BS5584:1978 EN50022 Specification for Low voltage switchgear and controlgear for industrial use Mounting rails Top hat rails35mm wide for snap-on mounting of equipment This European Standard EN50022 was given as from31 May1978 the status ofa BritishStandard UDC621.316.54:621.3.027.2
2、:62218423.9 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue Mar 06 10:07:26 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS5584:1978 This British Standard was published under the authority ofthe Executive Board on 31 May1978 BSI 03-1999 The following BSI references relate
3、to the work on this standard: Committee referencePEL/92 Draft for comment75/21514DC ISBN 0 580 10126 6 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises the National Committees of th
4、e following countries. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages T
5、his document comprises a front cover, an inside front cover, pages i and ii, theEN title page, pages2 to8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside
6、front cover. Austria Netherlands Belgium Norway Denmark Portugal Finland Spain France Sweden Germany Switzerland Ireland United Kingdom Italy Amendments issued since publication Amd. No. Date of issue Comments Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue Mar 06 10:07
7、:26 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS5584:1978 BSI 03-1999 i Contents Page Cooperating organizations Inside front cover Text of EN 50 022 3 National appendix A Inside back cover National appendix B Inside back cover Licensed Copy: Institute Of Technology Tallaght, Institute of Technology,
8、 Tue Mar 06 10:07:26 GMT+00:00 2007, Uncontrolled Copy, (c) BSIii blank Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue Mar 06 10:07:26 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN50022 Edition1 July1977 UDC621.316.54:62
9、1.3.027.2:62218423.9 Key words: Electrical switchgear and controlgear industrial use domestic use mounting rail mounting of equipment snap-on mounting top hat rail steel rail dimensional standardization 35mm wide (top hat rail) English version Low voltage switchgear and controlgear for industrial us
10、e Mounting rails Top hat rails35mm wide for snap-on mounting of equipment Appareillage industriel basse tension. Profils supports. Profils chapeau de longeur35mm pour la fixation dappareils encliquetables Industrielle Niederspannungs-Schaltgerte. Tragschienen. Hutschienen35mm breit zur Schnappbesfes
11、tigung von Gerten This European Standard was accepted by CENELEC on5 July1977. CENELEC members are committed in accordance with CENELEC Internal Regulations to given this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references conce
12、rning such national standards may be obtained on application to the CENELEC General Secretariat or to any CENELEC member. This European Standard is established by CENELEC in three official versions (English, French, German). A translation made by another member under its own responsibility, in its o
13、wn language, and notified to CENELEC has the same status. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Ireland, Italy, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for
14、Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr elektrotechnische Normung General Secretariat: rue Brderode,2, B1000 Brussels Copyright reserved to all CENELEC members Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tu
15、e Mar 06 10:07:26 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN50022 BSI 03-1999 2 Contents Page This European Standard has been prepared by CENELEC Technical Committee17X. 1 General 3 2 Scope 3 3 Dimensions 3 4 Designation 3 5 Material 3 6 Finish 3 7 Availability 3 8 Tolerances on form 4 Appendix Gu
16、idance for the use of top hat rails 5 Figure 1 Top hat rails35mm wide 3 Figure 2 Tolerances on form 4 Figure 3 Assessment of deflection of rail 5 Figure 4 Load capacity, M E = f (L, h) 6 Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue Mar 06 10:07:26 GMT+00:00 2007, Unc
17、ontrolled Copy, (c) BSIEN50022 BSI 03-1999 3 This European Standard has been prepared by CENELEC Technical Committee 17X. 1 General To ensure the universal utilization of snap-on mounting of equipment, it is appropriate to standardize certain types of rail. This standard specifies two types of top h
18、at rail, both35mm wide: one,7.5mm high, is already widely used; the other,15mm high, is new; it is more rigid and permits the mounting of heavier equipment and/or greater distances between fixing points. For the mounting of equipment that is too large or too heavy for either35mm top hat rail, a75mm
19、top hat rail is specified in EN50023. 2 Scope This standard specifies35mm wide steel top hat rails for the snap-on mounting of equipment. 3 Dimensions The dimensions of both types of top hat rail are given in Figure 1. These dimensions apply over the whole length of the top hat rail, but shall not b
20、e verified anywhere less than10mm from the ends. 4 Designation The designation of a35mm wide top hat rail,7.5mm high: top hat rail EN5002235 7.5 The designation of a35mm wide top hat rail,15mm high: top hat rail EN5002235 15 5 Material The material used shall be: cold rolled carbon steel sheet; skin
21、 passed after annealing; bright surface finish; tensile strength between320N/mm 2 and420N/mm 2 ; elongation at least30%; 180 bend tested longitudinally and transversely with regard to the direction of rolling. Each country may indicate its corresponding national standard. Other qualities of steel ma
22、y be used only by agreement between the manufacturer and the user. 6 Finish The finish shall be zinc-plated and chromated, with a layer thickness of at least64m, except for cut surfaces resulting from cutting to length. Other finishes may be used by agreement between the manufacturer and the user. 7
23、 Availability Top hat rails shall be supplied either in manufactured lengths of at least1m, or in ready cut lengths. Figure 1 Top hat rails35mm wide Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue Mar 06 10:07:26 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN50022 4 BSI 0
24、3-1999 8 Tolerances on form The tolerances on form are shown in Figure 2, in accordance withISO/R1101 1) . 1) Reference of corresponding national standard (see National appendix B) Figure 2 Tolerances on form Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue Mar 06 10:07:
25、26 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN50022 BSI 03-1999 5 Appendix Guidance for the use of top hat rails To determine the permissible load of rails, correctly used, the twisting deformation is always the most important factor. The sagging stress, on the other hand, is small and can be disre
26、garded. Research has shown that, as a result of the current practice of fixing rails by means of two screws, a torsion stress 50N/mm 2can cause a permanent deformation of the rail. The maximum permissible torque for that stress is independent of the distance between rail fixing points, e.g.750Nmm fo
27、r a top hat rail357.5. For distances between fixing points used in practice, with this force an excessive deformation occurs generally in the middle of the top hat rail. A method for assessing this deformation is shown in Figure 3. Using this method, the maximum equivalent torque M Eas a function of
28、 the distance L between fixing points has been calculated for three values of deflection h, for both types of rail and is shown in Figure 4. M is the torque due to the force from the equipment mounted on the rail, which equals force times the distance between the centre of gravity and the mounting p
29、lane (inNmm) (possibly supplemented to take shocks into account) M E is the moment (inNmm) of the equivalent torque acting in the middle of the rail for a number of individual moments M of similar equipment: J P is the polar moment of inertia of the rail (inmm 4 ) G is the sliding modulus (steel pla
30、te80000N/mm 2 ) L is the distance between fixing points (inmm) h is the deflection (inmm) of the rail at50mm from the fixing surface of the equipment: Figure 3 Assessment of deflection of rail ME= CM 2 - h M E .L 4.J p .G -50 = Licensed Copy: Institute Of Technology Tallaght, Institute of Technology
31、, Tue Mar 06 10:07:26 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN50022 6 BSI 03-1999 Figure 4 Load capacity, M E = f (L, h) Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue Mar 06 10:07:26 GMT+00:00 2007, Uncontrolled Copy, (c) BSIEN50022 BSI 03-1999 7 Example 1. A rail
32、35 7.5, L =300mm, may be loaded with M E =350Nmm for h=1mm. Example 2. It is required to use a rail800mm long to support equipment having an equivalent torque M E =480Nmm for h=1mm. 1st possibility: rail35 15 Figure 4 shows that L =800mm is convenient for M E k2100Nmm 2nd possibility: rail35 7.5 Fig
33、ure 4 shows that L =800mm is only acceptable with M E k 120Nmm, and that L =400mm could be acceptable, since M E k 250Nmm. As250Nmm480/2Nmm, an intermediate fixing point at L =400mm would be sufficient. Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue Mar 06 10:07:26 GMT
34、+00:00 2007, Uncontrolled Copy, (c) BSI8 blank Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue Mar 06 10:07:26 GMT+00:00 2007, Uncontrolled Copy, (c) BSIBS5584:1978 BSI 03-1999 National appendix A The United Kingdom participation in the preparation of this European Stan
35、dard came under the direction of the Power Electrical Engineering Standards Committee of BSI. The committee consists of representatives from the following Government departments and scientific and industrial organizations: Associated Offices Technical Committee Association of Short Circuit Testing A
36、uthorities* British Electrical and Allied Manufacturers Association (BEAMA)* British Railways Board British Steel Corporation Department of Energy (Electricity) Electrical Contractors Association* Electrical Contractors Association of Scotland* Electrical Research Association* Electricity Supply Ind
37、ustry in England and Wales* Engineering Equipment Users Association* Institution of Electrical Engineers* Ministry of Defence* National Coal Board* Trades Union Congress The organizations marked with an asterisk in the above list, together with the following, were directly represented on the committ
38、ee involved with the work on this standard: Association of Control Manufacturers (BEAMA) Association of Supervisory and Executive Engineers Control and Automation Manufacturers Association (BEAMA) Copper Development Association Department of the Environment (PSA) Electrical Installation Equipment Ma
39、nufacturers Association (BEAMA) Electronic Components Industry Federation Health and Safety Executive The Transmission & Distribution Association (BEAMA) National appendix B With reference to clause1, EN50022 has been published as BS5584 “Specification for low voltage switchgear and controlgear for
40、industrial use. Mounting rails. Top hat rails35mm wide for snap-on mounting of equipment”. With reference to clause8, BS308 “Engineering drawing practice” is technically equivalent to ISO/R1101. Licensed Copy: Institute Of Technology Tallaght, Institute of Technology, Tue Mar 06 10:07:26 GMT+00:00 2
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