1、BRITISH STANDARDBS EN61308:2006High-frequency dielectric heating installations Test methods for the determination of power outputThe European Standard EN 61308:2006 has the status of a British StandardICS 25.180.10g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54
2、g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN 61308:2006This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2006 BSI 2006ISBN 0 580 49014 9National forewordThis Bri
3、tish Standard is the official English language version of EN 61308:2006. It is identical with IEC 61308:2005. It supersedes BS EN 61308:1997 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PEL/27, Electroheating, which has the responsibility to: A list
4、 of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesThe British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards
5、Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does
6、not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European development
7、s and promulgate them in the UK.Summary of pagesThis document comprises a front cover, an inside front cover, the EN title page, pages 2 to 14, an inside back cover and a back cover.The BSI copyright notice displayed in this document indicates when the document was last issued.Amendments issued sinc
8、e publicationAmd. No. Date CommentsEUROPEAN STANDARD EN 61308 NORME EUROPENNE EUROPISCHE NORM April 2006 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Normalisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassa
9、rt 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 61308:2006 E ICS 25.180.10 Supersedes EN 61308:1996English version High-frequency dielectric heating installations - Test methods for the determination
10、of power output (IEC 61308:2005 ) Installations de chauffage dilectrique haute frquence - Mthodes dessai pour la dtermination de la puissance de sortie (CEI 61308:2005 ) Hochfrequente dielektrische Erwrmungsanlagen - Prfverfahren fr die Bestimmung der Ausgangsleistung (IEC 61308:2005 ) This European
11、 Standard was approved by CENELEC on 2005-12-01. 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 co
12、ncerning such national standards 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 in
13、to its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy
14、, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Foreword The text of document 27/495/FDIS, future edition 2 of IEC 61308, prepared by IEC TC 27, Industrial electroheating equipment, was
15、 submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61308 on 2005-12-01. This European Standard supersedes EN 61308:1996. Significant changes with respect to EN 61308:1996 are as follows: the equipment under test has been classified into two types: A and B, according to the
16、ir design; test methods have been supplemented by the wet-sand load method and the description of the lamp load by an example; evaluation of the output power for dielectric plastic welders has been added; definitions have been brought into line with IEC 60050-841:2004. The following dates were fixed
17、: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2006-11-01 latest date by which the national standards conflicting with the EN have to be withdrawn (dow) 2008-12-01 This European Standard makes reference t
18、o International Standards. Where the International Standard referred to has been endorsed as a European Standard or a home-grown European Standard exists, this European Standard shall be applied instead. Pertinent information can be found on the CENELEC web site. _ Endorsement notice The text of the
19、 International Standard IEC 61308:2005 was approved by CENELEC as a European Standard without any modification. _ 2 EN 61308:2006CONTENTS 1 Scope and object4 2 Normative references .5 3 Terms and definitions.5 4 Test loads 6 4.1 General .6 4.2 Calorimeter load 6 4.3 Lamp load .6 4.4 Matched resistiv
20、e load .6 4.5 Wet-sand load .6 5 Description of tests.6 5.1 General .6 5.2 Calorimeter-load method7 5.3 Lamp-load temperature method .9 5.4 Matched resistive load method.11 5.5 Wet-sand load method.11 5.6 Evaluation of the output power for high-frequency dielectric plastic welders 12 5.7 Evaluation
21、of the output power for type B equipment 13 Annex A (informative) Recommended test circuit for the lamp-load method 14 Figure 1 Example of a calorimeter load.8 Figure 2 Example of a short tubular calorimeter load 9 Figure 3 Lamp-load circuit9 Figure 4 Example of a lamp load 10 Figure 5 Detail of the
22、 lamp load11 Figure 6 Plastic welding test electrode .13 Figure A.1 Recommended test circuit for the lamp-load method 14 3 EN 61308:2006HIGH-FREQUENCY DIELECTRIC HEATING INSTALLATIONS TEST METHODS FOR THE DETERMINATION OF POWER OUTPUT 1 Scope and object This International Standard is applicable to i
23、ndustrial high-frequency dielectric heating installations used for the purpose of thermal applications such as melting, drying, welding, insect extermination, and gluing of partially conductive or non-conductive materials such as plastics, wood, rubber, textiles, glass, ceramic, paper, bamboo or foo
24、dstuffs, in both normal and protective atmospheres, using, for example, inert gases or vacuum. This standard relates to high-frequency dielectric heating installations with nominal dielectric heating frequency in the range from 1 MHz to 300 MHz with rated useful output power greater than 50 W. The m
25、ain purpose of this standard is to assist in compliance with the requirements set out in 6.4 of IEC 60519-9 when testing electroheating power sources. It is not primarily intended as a means of representing a potential high-frequency heating application for the requirement of the user. Due to the la
26、rge variety of dielectric heating applications, any output power value obtained as a result of these tests should not always be taken as representing the power that can be dissipated in a particular dielectric heating installation, but, in certain instances, the output power value could be used as a
27、n indication of performance. The power required to heat a charge is dependent, for example, on the type of material heated, the temperature of heating and ambient moisture and on the construction of the electrode system. NOTE Heating a charge with dielectric parameters deeply changing in time and/or
28、 temperature the value of the output power obtained with the actual charge may be different from that obtained in standard test conditions. For equipment working outside the ITU-designated bands, the frequency of the generator follows the resonant frequency of the output circuit, thus the output pow
29、er can remain fairly stable during the work cycle, even with hand tuning of the output circuit. Therefore, according to this standard, the test well represents the actual output power in practical work conditions. For equipment working in ITU-designated bands, the frequency of the generator remains
30、stable, but the resonant frequency of the output circuit varies with the change of dielectric parameters of the load. Therefore, the value of the mean output power in the work cycle can be much lower than the value obtained in the test conditions. This value depends on the time response of the event
31、ual automatic tuning system. This standard relates to equipment normally operating under continuous rated conditions. 4 EN 61308:20062 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies.
32、 For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 60050-841:2004, International Electrotechnical Vocabulary Part 841: Industrial electroheat IEC 60519-9, Safety in electroheat installations Part 9: Particular requirements for high-frequenc
33、y dielectric heating installations 3 Definitions For the purposes of this document, the terms and definitions given in IEC 60050-841 and IEC 60519-9, as well as the following, apply. 3.1 type A equipment equipment with a dielectric heating generator independent of, or separable from, the applicator
34、to which the high-frequency power is provided, for example, by a coaxial feeder 3.2 type B equipment equipment with a dielectric heating generator directly coupled to the applicator, for example, generator built into the plastic welding press NOTE In some cases, equipment with the dielectric heating
35、 generator directly connected to the heating chamber and inseparable from it can be treated as type A equipment. 3.3 useful output power type A equipment maximum power measured in the test load described in this standard NOTE In this type, the output terminals of the generator are accessible, or the
36、 heating capacitor allows the use of the wet-sand test. In certain cases, the parts of the gluing or welding press can be disconnected, allowing access to the output terminals. The useful output power will be equal to, or greater than, the rated useful output power. 3.4 useful output power type B eq
37、uipment oscillating power calculated on the basis of measured values of voltages and currents NOTE The design of such equipment does not allow the connection of a test load. Therefore, only evaluated useful output power can be specified (see 5.7). For a particular kind of equipment, the output, for
38、example, the number of pieces heated per hour, may be given, or the output power can be evaluated by the plastic welding test electrode. The useful output power will be equal to, or greater than, the rated useful output power. 3.5 plastic welding test electrode cutting-edge welding electrode which c
39、onsists of straight parallel parts separated by 20 mm, 2 mm broad, 20 mm high and as long as practically possible for the press used 5 EN 61308:20064 Test loads 4.1 General There are four different types of useful output power test loads used in high-frequency dielectric heating installations. Only
40、the main ones are outlined here. Specific constructions shall conform to known engineering techniques. The test loads should be constructed so as to reflect the characteristics of the working load as closely as practically possible. The calorimeter load, lamp load and resistive load allow the measur
41、ement of the output power of the dielectric heating generator. The wet-sand load allows the measurement of the useful output power of the dielectric heating installation (as defined in IEC 60519-9). For plastic welders, the test with the electrode defined in 3.5 allows the evaluation of the output p
42、ower of the dielectric heating installation. 4.2 Calorimeter load A calorimeter load is used for measuring the useful output power when the load is assumed to be a combination of capacitance and resistance and for cases where the measured power is about 1 kW or greater. 4.3 Lamp load The lamp load i
43、s used to measure useful output power of up to about 1 kW. The matching of the load is accomplished by the selection of single-lamp power as well as by the connection of several lamps in parallel or in series. 4.4 Matched resistive load A matched resistive load can be used for applications where the
44、 load can be connected to the high-frequency output terminals. 4.5 Wet-sand load The load, which consists of a charge of wet sand placed in the heating capacitor, can be used for some applications where the high-frequency output terminals of the generator are not accessible. 5 Description of tests 5
45、.1 General Values of electromagnetic fields in places accessible to the personnel shall conform to national and/or international safety regulations. High-frequency electromagnetic fields should not affect measuring devices. For all listed calorimetric methods, care shall be taken that the outlet tem
46、perature is measured as close as possible to the load. 6 EN 61308:20065.2 Calorimeter load method Typical examples are shown in Figures 1 and 2, but variations of these designs are acceptable. The measuring element is composed of glass or a low power-loss material and comprises two electrodes manufa
47、ctured from a non-magnetic material such as copper or aluminium. The generator output terminals are connected to the two electrodes and water serving as the power-absorbing medium flows through the charge. The electrode spacing may be adjustable for load-matching purposes. To achieve the correct imp
48、edance matching between the generator and the load, it may be necessary to use a tuning circuit, in order to obtain the required output power. A recommended water flow is about 1 l/min per kW but not less than 0,5 l/min per kW. To avoid local water temperature hot spots through the charge, the water
49、 shall be thoroughly mixed. To avoid the formation of steam, which may lead to explosion, the water flow should be monitored, for instance, by means of flow interlocking switches. The water inlet temperature shall not exceed 35 C. The water outlet temperature shall not exceed 60 C. The difference between the outlet temperature and the inlet temperature shall be at least 10 K in order to obtain measurement results of acceptable accuracy. The specific conductivity of the water shall be between 200 S/cm
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