1、STD.BSI ES EN 602Lb-4-3-ENGL 2000 II Lb24bb9 0879745 380 BRITISH STANDARD BS EN 602 16-4-3:2000 IEC 60216-4-3:2000 Electrical insulating materials - Thermal endurance properties - Part 4-3: Ageing ovens - Multi-chamber ovens The European Standard EN 60216 - monitor related intemational and European
2、developments and promulgate them in the UK. A iist of organhtions represented on this subcommittee can be obtained on request to its secretary. From 1 January 1997, all IEC publications have the number 60000 added to the old number. For instance, IEC 27-1 has been renumbered as IEC 627-1. For a peri
3、od of time during the change over from one numbering system to the other, publications may contain identifieis from both systems. Cross-references Attention is dram to the fact that CEN and CENELEC Standards nody include an annex which lists normative references to international publications with th
4、eir corresponding European publications. The British Standards which implement these international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitied “Intedonal Stan- Correspondence Index“, or by using the “Find“ facility of t
5、he BSI Standards Electronic Catalogue. 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. Su
6、mmary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 15 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. This British Standard, having been prepared under the direction of the Elec
7、trotechnicai Sector Committee, was published under the authoriw of the Standards Committee and comes into effect on 15 November 2000 O BSI 11-2000 ISBN O 580 3422 4 sTD.BSI BS EN b021b-4-3-ENGL 2000 Lb24bb7 0877747 153 EUROPEAN STANDARD EN 60216-4-3 NORME EUROPENNE EUROPISCHE NORM August 2000 ICs 17
8、.220.99; 19.020; 29.035.01 English version Electrical insulating materials - Thermal endurance properties Part 4-3: Ageing ovens - Multi-chamber ovens (I EC 602 1 6-4-312000) Matriaux isolants lectriques - Elektroisolierstoffe - Proprits dendurance thermique Thermische Langzeiteigenschaften Partie 4
9、-3: Etuves de vieillissement - Teil 4-3: Alterungswrmeschrnke - Etuves chambres multiples Mehrkammerwrmeschrnke (CE1 6021 6-4-3:2000) (IEC 602164-3:2000) This European Standard was approved by CENELEC on 2OO-0601. CENELEC members are bound to comply with the CEWCENELEC Internal Regulations which sti
10、pulate the conditions for giving this European Standard the status of a national standard without any alteration. Uptedate lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standar
11、d exists in three offiaal versions (English. French, German). A version in any other language made by translation under the responsibility of a CENELEC member into hs own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national e
12、lectrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy. Luxembourg, Netherlands, Noway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comit Europen d
13、e Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels (8 2000 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60216-4-3:2000 E STD.BSI BS EN 60
14、2Lb-4-3-ENGL 2000 E 1624bb7 0877748 0qT Page 2 EN 60216-4-3:2000 Foreword The text of document 15E/l32/FDIS, future edition 1 of IEC 60216-4-3, prepared by SC 15E, Methods of test, of IEC TC 15, Insulating materials, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 60
15、216-4-3 on 2000-06-01. 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 - latest date by which the national standards conflicting with the EN have to be withdrawn Annexes designate
16、d “normative“ are part of the body of the standard. In this standard, annex ZA is normative. Annex ZA has been added by CENELEC. Endorsement notice (dop) 2001 -03-01 (dw) 2003-06-01 The text of the International Standard IEC 602164-3:2000 was approved by CENELEC as a European Standard without any mo
17、dification. STD.BSI BS EN 60216-4-3-ENGL 2000 I1624669 0879749 T2b Page 3 EN 60216-4-3:2000 CONTENTS Page INTRODUCTION 4 Clause 1 Scope 5 2 Normative references . 5 3 Definitions . 6 4 Constructional requirements . 7 4.1 General 7 4.2 Specimen chambers 7 4.3 Ventilation 7 4.4 Specimen mounting arran
18、gements 8 4.5 Temperature control 8 Test methods and performance requirements . 8 5 5.1 Temperature variation . 8 5.1 . 1 Requirement . 8 5.1.2 Test method 9 5.2.1 Requirement . 9 5.2.2 Test procedure 10 6 Report . 10 7 Conditions of use and instructions for in-service monitoring by the user 11 7.1
19、Conditions of use 11 7.2 In-service monitoring . 11 7.3 Report 12 5.2 Time constant . 9 Annex ZA (normative) Normative references to international publications with their corresponding European publications . 15 0 BSI 11-2000 STD.BSI BS EN b021b-4-3-ENGL 2000 Lb24bb9 0879750 748 Page 4 EN 60216-4-3:
20、2000 INTRODUCTION IEC 60216, which deals with the determination of thermal endurance properties of electrical insulating materials, is composed of several parts: Part 1 : General guidelines for ageing procedures and evaluation of test results; Part 2: Choice of test criteria: Part 3: Instructions fo
21、r calculating thermal endurance characteristics - Section 1 : Calculations using mean values of normally distributed complete data; Part 3: Instructions for calculating thermal endurance characteristics - Section 2: Calculations for incomplete data: proof test results up to and including the median
22、time to end-point (equal test groups); Part 4: Ageing ovens - Section 1 : Single chamber ovens; Part 4-2: Ageing ovens - Precision ovens for use up to 300 “C (in preparation); Part 5: Guidelines for application of thermal endurance characteristics. NOTE This series may be extended. For revisions and
23、 new parts, see the current catalogue of IEC publications for an up-to-date list. Q BSI 11-2000 STD.BSI BS EN b021b-4-3-ENGL 2000 m Lb24bb7 0877751 b84 = Page 6 EN 60216-4-3:2000 ELECTRICAL INSULATING MATERIALS - THERMAL ENDURANCE PROPERTIES - Part 4-3: Ageing ovens - Multi-chamber ovens I Scope Thi
24、s part of IEC 60216 covers the minimum requirements for ventilated and heated multi- chamber ovens used for thermal endurance evaluation of electrical insulation and of any other appropriate thermal conditioning application where the use of single-chamber ovens is inappropriate. It covers ovens desi
25、gned to operate over all or part of the temperature range from 20 K above ambient to 500 “C. It gives acceptance tests and in-service monitoring tests for both unloaded and loaded multi- chamber ovens and conditions of use. 2 Normative references The following normative documents contain provisions
26、which, through reference in this text, constitute provisions of this part of IEC 60216. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this part of IEC 60216 are encouraged to investigate the possibilit
27、y of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of IEC and IS0 maintain registers of currently valid International Standards. IEC 60216-1 :1990, Guide for the determin
28、ation of thermal endurance properties of electrical insulating materials - Part 7: General guidelines for ageing procedures and evaluation of test results (under revision) IEC 6021 6-3-1 :1990, Guide for the determination of thermal endurance properties of electrical insulating materials - Part 3: I
29、nstructions for calculating thermal endurance characteristics - Section 7: Calculations using mean values of normally distributed complete data IEC 6021 6-3-2:1993, Guide for the determination of thermal endurance properties of electrical insulating materials - Part 3: Instructions for calculating t
30、hermal endurance characteristics - Section 2: Calculations for incomplete data: proof test results up to and including the median time to end-point (equal test groups) IEC 6021 6-4-1 :1990, Guide for the determination of thermal endurance properties of electrical insulating materials - Part 4: Agein
31、g ovens - Section 7: Single-chamber ovens 8 BSI 11-2000 Page 6 sTD.BSI BS EN b02Lb-Y-3-ENGL 2000 0 Lb24bb 0879752 5LO 0 EN 60216-4-3:2000 3 Definitions For the purposes of this part of IEC 60216, the following definitions apply: 3.1 rate of ventilation number of air changes per hour in the exposure
32、chamber at room temperature. Any calculation of the velocity of the air is based on the cross-sectional area of the chamber measured in a plane that intersects the working volume and is made assuming plug flow 3.2 exposure volume that central part of each chamber that meets the requirements for temp
33、erature variation 3.3 exposure temperature (see also global exposure temperature) temperature selected for ageing test specimens to obtain data for the determination of effects of temperature on standardized test specimens 3.4 temperature fluctuation maximum change in temperature at one point in the
34、 exposure volume over a period of 3 h 3.5 temperature difference maximum difference of temperature between any two points in the exposure volume at any one time 3.6 . temperature variation difference between the highest temperature and the lowest temperature measured over a period of 3 h 3.7 global
35、ave rage tem pera tu re an average temperature, calculated from the results of determinations made over a period of approximately 3 h using nine sensors spaced throughout the exposure volume of a chamber NOTE The global average temperature is considered to be the initial effective global exposure te
36、mperature. 3.8 time constant measure of the time taken for the temperature of a standard specimen to approach the cell temperature 3.9 temperature deviation deviation of the exposure temperature from the nominal value due to the combination of temperature variation and the error of temperature measu
37、rement 0 BSI 11-2000 STD.BSI BS EN b21b-4-3-ENGL 2000 l1624bb9 0879753 457 Page 7 EN 60216-4-3:2000 4 Constructional requirements 4.1 General The oven shall be soundly constructed using suitable materials. All electrical and other ancillary fittings shall be readily accessible for maintenance purpos
38、es. The construction shall be fitted with equipment to switch off the oven and preferably sound an alarm when the temperature of the thermostatically controlled medium deviates from the allowable temperature range or if the supply of ventilating air fails. 4.2 Specimen chambers The ovens shall consi
39、st of at least two open-topped, approximately cylindrical chambers with appropriate lids, mounted with their axis approximately vertical. Each lid shall form an effective seal with the chamber: the leakage of ventilating gas from the lid seal shall be no more than 5 % of the flow rate of ventilating
40、 gas to the specimen chamber. NOTE 1 Some types of O ring seals have been found to be satisfactory. Unless otherwise specified, the individual chambers shall have a minimum diameter of 35 mm and a minimum length of 200 mm. The materials of construction of the chambers, their lids and their internal
41、parts shall not contain any copper, copper alloy or any material that may give off interfering volatiles over the temperature range of the oven, for example some silicone resins. The design shall be such as to permit the chambers to be easily cleaned after each test. The chambers shall be mounted in
42、 a thermostatically controlled heat transfer medium: for example in a metal block, a liquid or sand bath, a saturated vapour bath or in an air circulating oven. Examples of typical designs are given in figures ! and 2. NOTE 2 The performance of air circulating ovens in this context is usually poorer
43、 than the alternative systems. 4.3 Ventilation Each chamber shall be provided with a supply of continuously metered, filtered, pre-heated ventilating air, entering the chamber at one end and being exhausted through the other. When specified in the purchase contract, provision shall be made for the u
44、se of ventilating gases other than air. Ventilation rates in the range 5 to 20 changes per hour shall be available. 0 BSI 11-2000 STD.BSI BS EN bOZlh-4-3-ENGL 2000 Lb24hb9 0877754 393 Page 8 EN 60216-4-32000 K The incoming air shall be directed to the cylindrical wall of the chamber in such a manner
45、 as to produce turbulent flow throughout the cell and the general design shall be to minimize recirculation of the ventilating air within each chamber. In order to prevent cross- contamination of volatile components, ventilating air from one chamber shall not come into contact with specimens in any
46、other chamber. It is recommended that the exhaust from the chambers be vented to outside atmosphere, but precautions shall be taken to ensure that volatiles produced by the ageing specimens do not damage health or the environment. K Consideration shall be given to ensure adequate purity of the incom
47、ing ventilating air to minimize influence on the results. In cases where the results of tests are influenced by impurities in the ventilating medium, e.g. water vapour, it shall be controlled and reported. 4.4 Specimen mounting arrangements Provision shall be made for supporting/suspending and posit
48、ioning specimens within each chamber. The specimens shall not touch each other nor touch the chamber walls. The specimen and supports shall not occupy more than 25 % of the cross-sectional area of the chamber in any one plane, nor more than 50 % of the longitudinal cross-sectional area in any one pl
49、ane, nor more than 10 % of the effective working volume of the chamber. 4.5 Temperature control The temperature in the exposure volume shall be controllable to the limits given in 5.1 .I. 5 Test methods and performance requirements 5.1 Temperature variation 5.1.1 Requirement The exposure volume shall constitute at least the central 70 % of the volume of the chamber with the maximum allowable temperature variation given in table I. Table 1 - Maximum allowable temperature variation Temperature range “C . 100 100 225 225 I 300 300 I 400 Temperature vari
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