1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58enclosures and built-in devices for rail fixing for household and similar installationsICS 29.060.1
2、0Recommendations for dimensional co-ordination between PUBLISHED DOCUMENTPD CLC/TR 50473:2007PD CLC/TR 50473:2007This Published Document was published under the authority of the Standards Policy and Strategy Committee on 29 June 2007 BSI 2007ISBN 978 0 580 52988 7Amendments issued since publicationA
3、md. No. Date CommentsThis publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.National forewordThis Published Document was published by BSI. It is the UK implementation of CLC/TR 50473:2007. It supersedes PD 6590:1996
4、which is withdrawn. The UK participation in its preparation was entrusted by Technical Committee PEL/23, Electrical accessories, to Subcommittee PEL/23/1, Circuit breakers and similar equipment for household use.A list of organizations represented on this committee can be obtained on request to its
5、secretary.TECHNICAL REPORT CLC/TR 50473 RAPPORT TECHNIQUE TECHNISCHER BERICHT May 2007 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Br
6、ussels 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. CLC/TR 50473:2007 E ICS 29.060.10 Supersedes R023-001:1995English version Recommendations for dimensional co-ordination between enclosures and built-in devices for rail fixi
7、ng for household and similar installations This Technical Report was approved by CENELEC on 2006-01-21. CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Irelan
8、d, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword Report R023-001:1995 was prepared by the Technical Committee CENELEC TC 23E, Circuit breakers and similar devices for ho
9、usehold and similar applications. It has been drawn up on the basis of the decisions taken by TC 23E at their 9thmeeting on 8thand 9thNovember 1994, where the document CLC/TC23E(Sec)38 and the relevant comments of the National Committees were examined. This Report was approved by CENELEC on 1995-03-
10、06. Following BT decision D124/C048 and TC 23E advice, an updated version of R023-001:1995 was circulated for voting for conversion into a Technical Report in accordance with the Internal Regulations, Part 2, Subclause 11.4.3.3 and was approved by CENELEC as CLC/TR 50473 on 2006-01-21. This Technica
11、l Report supersedes R023-001:1995. CLC/TR 50473:2007 2 1 Scope The purpose of this report is to give recommendations of the co-ordination of dimensions between enclosures and built-in devices for rail fixing for household or similar installations by listing the principal overall and related mounting
12、 dimensions, the rated current of a single device not exceeding 125 A. Examples of these devices are: MCBs, RCDs switches, fuse-systems, indicating lamps, relays, socket-outlets, timing switches, etc. Compliance with this document does not preclude the need for compliance with other relevant specifi
13、cations. This document needs not apply to type tested and partially type tested assemblies which are covered by other specifications. The means of fixing envisaged in this document are mounting rails. Other possible means of fixing may be used but are not covered by these recommendations. NOTE The o
14、nly criterion chosen in this document for co-ordination of dimensions has been the geometry of the devices. When selecting the enclosure, other criteria should be taken into account, e.g. the rated current of the devices. 2 Normative references EN 60715:2001, Dimensions of low-voltage switchgear and
15、 controlgear - Standardized mounting on rails for mechanical support of electrical devices in switchgear and controlgear installations (IEC 60715:1981 + A1:1995) 3 Definitions For the purpose of this Technical Report the following definitions apply: 3.1 module (m) a basic single block 3.2 device a m
16、odular block that is not intended to be split into independent units 4 Mounting rails The mounting rails used shall be of the 35 mm “Top hat” type according to EN 60715 or an equivalent mounting means, obtained e.g. by moulding or pressing. NOTE Other types of mounting rails may be used but are not
17、necessarily covered by these recommendations. Recommendations for dimensional co-ordination of devices designed to be fixed on two mounting rails are under consideration. Examples are given in Annex A. 5 Dimensions of devices relevant to mounting The principal dimensions necessary to co-ordinate the
18、 built-in devices with the enclosures are given in Figure 1. CLC/TR 50473:2007 3 5.1 Width “l” The width of a device shall be l = n (m 05,0+) mm where n = 0,5 or 1 or 1,5 or 2 or 2,5 or 3 or 3,5 or 4 m = 12,5 or 17,5 mm NOTE The preferred value for future designs is m = 17,5 mm. 5.2 Height of a give
19、n device “h” h1and h2of a given device (see Figure 1a) need not to be equal. h1maxor h2max, whichever is the greater, shall be chosen from the series 45 55 75 100 125 mm. NOTE 1 The maximum height (h1+ h2) must not exceed twice the values chosen. NOTE 2 The means for fixing or removing the device to
20、 and from the rail are not taken into account. 5.3 Height of front projection “d” (see Figure 1a) Up to and including a value h1or h2 whichever is the greater of 45 mm the height d of the front projections shall be 45 0,5 mm. For values of h1or h2greater than 45 mm the front projection “d” shall hav
21、e one of the following values: 45 mm and 80 mm, with a tolerance of 0,5 mm. NOTE The preferred value for future designs is d = 45 mm. 5.4 Depth dimensions q1, q2and q3(see Figure 1a) The depth dimensions are given in Table 1. Table 1 Depth dimensions q1maxmm q2minmm q3max bmm 55 60 70 44 a50c92,5 70
22、 55 57 92,5 80 64 66 100 76 84 10aPreferred value. bWhere more than one value of q3maxis shown for a value of q1maxand q2min; the appropriate value is a function of the design “family” of the device. cPreferred value of q2min = 52 mm. CLC/TR 50473:2007 4 6 Distance Y between parallel mounting rails
23、(see Figure 1b) The distance Y between centre lines of parallel rails shall be Y = X 25 mm where X = 4 or 5 or 6 or The tolerance shall not exceed 0,5 mm for Y 125 mm (X 5) and 1,0 mm for Y 125 (X 5). For boards or panels with 3 or more rows the cumulative tolerance shall not exceed 2 mm. NOTE 1 Mul
24、tiplier 4 is intended for boards or panels containing rows made up exclusively of accessories, indicator lights, fuses, etc. For rows containing switching devices the minimum value is 5. NOTE 2 The distance from the highest and lowest rail to the top or bottom face respectively of the board is not c
25、onsidered. NOTE 3 It is the responsibility of the manufacturer of the board to choose the appropriate Y-value(s). NOTE 4 In a given board values of Y different from each other may be used. 7 Clearances and creepage distances The clearances and creepage distances between live parts and accessible met
26、al parts shall correspond to those given in the relevant product standards. 8 Relevant mounting dimensions (see Figure 1b) 8.1 General rules for mounting dimensions 8.1.1 The general rules for the co-ordination of overall dimensions q and related mounting dimensions p are p1q1 where p147,5 mm for ne
27、w designs of q1max = 44 mm, p2q2where p251 mm for new designs of q2 52 mm, p3q3 where p2applies only at the edges of the window, and p3includes the maximum projection of the operating means or the rim of a recess for the operating means, and is to apply to the window area only. This requirement may
28、be disregarded in the case of devices which can only be operated by hand and circuit-breakers with trip-free release, provided that the ON and OFF positions of the operating means, if any, lie within p3. CLC/TR 50473:2007 5 8.1.2 To meet the requirements for reinforced insulation the following requi
29、rements shall apply to the devices (see Figure 1a): q1max q03 mm for future designs (to take into account metal front barriers) and a 3 mm; or if a is less than or equal to 3 mm and the distance B is less than 6 mm a shoulder is needed on the device for the front barrier at a distance of (q1max+ 305
30、,0+) mm. The width of this shoulder shall be between 2,5 mm and 5 mm. 8.2 Window openings (see Figure 1b) The height f of the opening for the window is obtained from the relationship: (d + 1) f (d + 2) where d is the nominal value of the height of the front projection (see 5.3). In order to obtain t
31、he degree of protection prescribed by the wiring rules appropriate measures shall be taken, e.g. use of blanking pieces. NOTE In EN 60439-3 a minimum degree of protection by the enclosure of IP 2XC is required for low voltage switchgear and controlgear assemblies intended to be installed in places w
32、here unskilled persons have access. 8.3 Strength of front barriers and/or doors Yielding of front barriers and/or doors as a result of external pressure shall be limited either by the mechanical strength of the material or by suitable shoulder (see 8.1.2). The requirements of the appropriate product
33、 standard, if any, shall apply. CLC/TR 50473:2007 6 X-X is the centreline of the front projection and of the rail when the device is mounted. Figure 1a) Overall dimensions of the device Figure 1b) Mounting dimensions relevant to the enclosure Figure 1 Principal overall and related mounting dimension
34、s of built-in devices da h1h2lB q0q1q2q3tX X The value of “t” shall allow the mounting of thedevice on a rail 35 mm x 7,5 mm to EN 60715,being fixed on a flat surface. Rail Front barrier Door P1P2P3f YCLC/TR 50473:2007 7 Annex A (informative) Extension to devices fixed on two rails for mounting in t
35、he same distribution board This annex gives guidance on how the report may be applied for devices designed to be mounted on two rails. Devices with a height of 75 mm, 100 mm or 125 mm (see 5.2) may be mounted on two rails, using the same enclosures as devices with a height of 45 mm or 55 mm, which a
36、re intended to be mounted on one rail only. It is only necessary to cut out the part of the front barrier between two parallel mounting rails, e.g. at the meter distribution board. Another method of mounting is that only the operating means protrudes through the cover or front barrier. Provisions ha
37、ve to be adopted by the manufacturer of the board to ensure that the front barrier has the required rigidity after cutting. Devices according to Figure A.1 are designed to be mounted on two rails, but it is also permissible to mount these devices on a single centre rail. These devices dont have an o
38、perating means, e.g. transformers, remote controls, etc. Devices according to Figure A.2 are also designed to be mounted on two rails and it is also permissible to mount these devices on a single centre rail. These devices can have their mounting means either integrated in the housing of the device
39、of an adapter can be used, which is fixed to the housing of the device. The devices with the adapter are surface-type devices, and different adapters may be used. Either devices where the mounting means is integrated in the housing or surface type devices with an adapter can be used. Figures A.1 and
40、 A.2 show examples of devices of one family-size using 125 mm distance between the two rails. CLC/TR 50473:2007 8 1) Mounting on two rails or on one single rail to EN 60715. 2) Accessible live parts shall be positioned in such a way that the distance from the live part to the outer surface of the fr
41、ont barrier at the edge of the window is not less than 6 mm taking into account the maximum cable cross section. 3) Additional support according to 8.1.2. Figure A.1 - Dimensions for devices without operating means to be mounted on two rails. Preferred range of rated current Inup to 125 A Figure A.2
42、 - Dimensions for devices to be mounted on two rails, including adapter, if any. Preferred range of rated current Inup to 125 A 170 0,5 2 111 125 0,5 215max.3 2 3 t 44 max.q2q3max111 125 0,5 215max.3 2 3 t 44 max.52 to 75 78 max. 2 2 Operating means 45 0,5 170 0,5 92,5 2 CLC/TR 50473:2007 9 PD CLC/T
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