《BS-EN-50015-1994.pdf》由会员分享，可在线阅读，更多相关《BS-EN-50015-1994.pdf（14页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN 50015:1994 Electrical apparatus for potentially explosive atmospheres Oil immersion “o” The European Standard EN 50015:1994 has the status of a British Standard UDC 621.31-78:614.833.4/5:001.4:620.1:62-77 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:19:09 GMT+00:0
2、0 2006, Uncontrolled Copy, (c) BSI BS EN 50015:1994 This British Standard, having been prepared under the direction of the General Electrotechnical Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 September 1994 BSI 01-1999 The followin
3、g BSI references relate to the work on this standard: Committee reference GEL/114 Draft for comment 90/34485 DC ISBN 0 580 22382 5 Cooperating organizations The European Committee for Electrotechnical Standardization (CENELEC), under whose supervision this European Standard was prepared, comprises t
4、he national committees of the following countries: AustriaItaly BelgiumLuxembourg DenmarkNetherlands FinlandNorway FrancePortugal GermanySpain GreeceSweden IcelandSwitzerland IrelandUnited Kingdom Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mo
5、n Nov 06 07:19:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50015:1994 BSI 01-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Text of EN 500153 National annex NA (informative) Committees responsible8 National annex NB (informative) Cross-reference
6、sInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:19:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 50015:1994 ii BSI 01-1999 National foreword This British Standard has been prepared under the direction of the General Electrotechnical Standards Policy Committee and i
7、s the English language version of EN 50015:1994 Electrical apparatus for potentially explosive atmospheres Oil immersion “o”, published by the European Committee for Electrotechnical Standardization (CENELEC). The standard should be read in conjuntion with BS EN 50014:1994 which it supplements. Prod
8、uct certification. Users of this British Standard are advised to consider the desirability of third party certification or product conformity with this British Standard based on testing and continuing surveillance, which may be coupled with assessment of a suppliers quality systems against the appro
9、priate Part of BS 5750. Enquiries as to the availability of third party certification schemes are forwarded by BSI to the Association of British Certification Bodies. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible
10、 for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN title page, pages 2 to 8, an inside back cover and a back cover. This st
11、andard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:19:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE
12、 EUROPISCHE NORM EN 50015 April 1994 UDC 621.31-78:614.833.4/5:001.4:620.1:62-777Will supersede EN 50015:1977 + A1:1979 To be read in conjunction with EN 50014:1992 Descriptors: Electrical apparatus, potentially explosive atmosphere, explosive atmosphere, explosion proofing, specific requirement, oi
13、l immersion “o” English version Electrical apparatus for potentially explosive atmospheres Oil immersion “o” Matrial lectrique pour atmosphres explosibles Immersion dans lhuile “o” Elecktrische Betriebsmittel fr explosionsgefhrdete Bereiche lkapselung “o” This European Standard was approved by CENEL
14、EC on 6 July 1993. 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 standar
15、ds 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 notifi
16、ed to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
17、United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels 1994 Copyright reserved to CENELEC members Ref. No. EN 50015:1994
18、E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:19:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50015:1994 2 BSI 01-1999 Foreword This European Standard has been prepared by a Working Group and the secretariat of CENELEC Technical Committee TC 31 in accordance with the decisions take
19、n by that committee during its meetings in Brussels 1991, Stockholm 1992 and Basle 1993. The text of the draft was submitted to the formal vote in December 1992 and was approved by CENELEC as EN 50015 on 1993-07-06. The following dates were fixed : This European Standard is to be read in conjunction
20、 with EN 50014:1992, Electrical apparatus for potentially explosive atmospheres General requirements, and with the second editions of the European Standards for the specific types of protection listed in the scope of EN 50014:1992. This European Standard should not be considered in conjunction with
21、any of the first edition standards and their amendments, published in 1977 or thereafter, listed in EN 50014. Contents Page Foreword2 General 1Scope3 2Normative references3 3Definitions3 4Constructional requirements4 Verification and tests 5Type tests5 6Routine tests6 Marking 7Marking6 latest date o
22、f publication of an identical national standard(dop) 1994-08-01 latest date of withdrawal of conflicting national standards(dow) Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:19:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50015:1994 BSI 01-19993 General 1 Scope 1.1 This European Sta
23、ndard specifies the requirements for the construction and testing of oil-immersed electrical apparatus, oil-immersed parts of electrical apparatus and Ex components in the type of protection “o”, intended for use in potentially explosive atmospheres of gas, vapour and mist. 1.2 This European Standar
24、d supplements EN 50014, the requirements of which apply to oil-immersed electrical apparatus. 1.3 This European Standard is applicable to electrical apparatus and parts of electrical apparatus which are not ignition capable in normal operation. Compliance of the electrical apparatus shall be assesse
25、d against IEC 79-15 except for those parts designed to comply with EN 50020. NOTEThis European Standard assumes that the electrical apparatus immersed in the protective liquid is fixed in its operating position in accordance with the installation instructions. 2 Normative references This European St
26、andard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply
27、to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. 2.1 European standards EN 50014:1992, Electrical apparatus for potentially explosive atmospheres General Requirements. EN 50019:1994, Ele
28、ctrical apparatus for potentially explosive atmospheres Increased Safety “e”. EN 50020:1994, Electrical apparatus for potentially explosive atmospheres Intrinsic Safety “i” (not yet published). EN 60529:1991, Degree of protection provided by enclosures (IP code) (IEC 529:1989). 2.2 IEC Publications
29、with reference to the relevant European publications IEC 79-15:1987, Electrical apparatus for explosive gas atmospheres Part 15: Electrical apparatus with type of protection “n”. IEC 156:1963, Method for the determination of the electric strength of insulating oils. IEC 247:1978, Measurement of rela
30、tive permittivity, dielectric dissipation factor and d.c. resistivity of insulating liquids. IEC 296:1982, Specification for unused mineral insulating oils for transformers and switchgear. IEC 588-2:1978, Askarels for transformers and capacitors Part 2: Test methods. IEC 836:1988, Specifications for
31、 silicone liquids for electrical purposes (HD 565 51:1993). 2.3 ISO publications ISO 2719:1988, Petroleum products and lubricants Determination of Flash Point Pensky-Martens closed cup method. ISO 3016:1974, Petroleum Oils Determination of pour point. ISO 3104:1976, Petroleum Products Transparent an
32、d opaque liquids Determination of kinematic viscosity and calculation of dynamic viscosity. 3 Definitions The following definitions specific to the type of protection oil immersion “o” are applicable in this European Standard; they supplement the definitions which are given in EN 50014. 3.1 oil imme
33、rsion “o” a type of protection in which the electrical apparatus or parts of the electrical apparatus are immersed in a protective liquid in such a way that an explosive atmosphere which may be above the liquid or outside the enclosure cannot be ignited 3.2 protective liquid mineral oil conforming t
34、o IEC 296 or an alternative liquid meeting the requirements of 4.1 3.3 sealed apparatus apparatus designed and constructed in such a manner as to prevent ingress of an external atmosphere during the expansion and contraction of the internally contained liquid during normal operation 3.4 non-sealed a
35、pparatus apparatus designed and constructed in such a manner as to allow the ingress and egress of an external atmosphere during the expansion and contraction of the internally contained fluid during normal operation Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:19:09 GMT+00:00 2006, Unc
36、ontrolled Copy, (c) BSI EN 50015:1994 4 BSI 01-1999 3.5 maximum permissible protective liquid level the maximum level the protective liquid can attain in normal service, taking into account the effects of expansion from the worst case filling condition specified by the manufacturer to the condition
37、of full load at maximum ambient temperature for which the apparatus is designed 3.6 minimum permissible protective liquid level the minimum level the protective liquid can attain in normal service taking into account the effects of contraction from the worst case filling condition to the condition o
38、f de-energization at minimum ambient temperature 4 Constructional requirements 4.1 Protective liquid other than mineral oil conforming to IEC 296 shall comply with the following specific requirements : a) the protective liquid shall have a fire point of 300 C (minimum) as determined by the test meth
39、od indicated in IEC 836. b) the protective liquid shall have a flash point (closed) of 200 C (minimum) determined in accordance with ISO 2719. c) the protective liquid shall have a kinematic viscosity of 100 cSt (maximum) at 25 C determined in accordance with ISO 3104. d) the protective liquid shall
40、 have an electrical breakdown strength of 27 kV (minimum) determined in accordance with IEC 156. In the case of silicone liquids IEC 836 shall be used. e) the protective liquid shall have a volume resistivity at 25 C of 1014 ohm.cm (minimum) determined in accordance with IEC 247. f) the pour point s
41、hall be 30 C (maximum) determined in accordance with ISO 3016. g) the acidity (neutralization value) shall be 0,03 mg KOH/g (maximum) determined in accordance with IEC 588-2. NOTEThe reference to IEC 588-2 identifies a test method only; it does not allow the use of substances prohibited by legislati
42、on. h) the protective liquid shall have no adverse effect on the properties of materials with which it is in contact. The manufacturer shall provide data to confirm compliance with the above. 4.2 For Group I apparatus, mineral oils are not acceptable. 4.3 The apparatus shall be constructed so that d
43、eterioration of the protective liquid by dust or humidity from the exterior is prevented by the following means. 4.3.1 Apparatus which is sealed shall be provided with a pressure relief device. This device shall be set and sealed by the manufacturer of the liquid filled apparatus to operate at least
44、 at 1,1 times the pressure above the liquid level at the maximum permissible protective liquid level. 4.3.2 Apparatus which is not sealed shall be constructed so that gas or vapour which may evolve from the protective liquid in normal service can readily escape. A breathing device complete with suit
45、able drying agent shall be provided. The manufacturer shall specify the maintenance requirements for the drying agent. The testing station is not required to verify the suitability of the drying agent nor its maintenance. 4.3.3 The apparatus shall have a degree of protection of at least IP66 as give
46、n in EN 60529 with no ingress of water. The outlet of the breathing device for non-sealed apparatus and the outlet of the pressure relief device for sealed apparatus shall have a degree of protection of at least IP23 as given in EN 60529. 4.4 Means shall be provided to guard against accidental loose
47、ning of external and internal fasteners, as well as of devices to indicate the liquid level, plugs and other parts for filling or draining the liquid. Examples of means to guard against accidental loosening are: cementing of threads; locking washers; wiring of bolt heads. A warning label is not cons
48、idered sufficient. 4.5 A protective liquid level indicating device (s) complying with the requirements of 4.5.1 to 4.5.3 shall be provided so that the liquid level of each separate liquid filled compartment can be easily checked in service. 4.5.1 The maximum and the minimum protective liquid levels
49、permissible in normal service shall be clearly marked, taking into account the effects of expansion and contraction resulting from operational temperature changes over the full ambient temperature range specified by the manufacturer. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 06 07:19:09 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 50015:1994 BSI 01-19995 4.5.2 The protective liquid level indicating device shall be so marked to indicate the levels to which the electrical apparatus shall be filled under the filli