1、BSI Standards PublicationHousehold electric heating pads Methods for measuring performanceBS EN 61255:2014National forewordThis British Standard is the UK implementation of EN 61255:2014. It is identical to IEC 61255:2014. It supersedes BS EN 61255:1995 which is withdrawn.The UK participation in its
2、 preparation was entrusted to TechnicalCommittee CPL/59, Performance of household electrical appliances.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are r
3、esponsible for its correct application. The British Standards Institution 2014.Published by BSI Standards Limited 2014ISBN 978 0 580 83328 1ICS 97.100.10Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStand
4、ards Policy and Strategy Committee on 31 October 2014.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN 61255:2014EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 61255 September 2014 ICS 97.100.10 Supersedes EN 61255:1994 English Version Household electric heati
5、ng pads - Methods for measuring performance (IEC 61255:2014) Coussins chauffants lectriques pour usage domestique - Mthodes de mesure des performances (CEI 61255:2014) Elektrische Haushalt-Heizdecken - Prfverfahren zurBestimmung der Gebrauchseigenschaften (IEC 61255:2014) This European Standard was
6、approved by CENELEC on 2014-08-14. 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
7、national standards may be obtained on application to the CEN-CENELEC Management Centre 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 i
8、ts own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Maced
9、onia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. European Committee for Electrotechnical Standardization Comit Euro
10、pen de Normalisation ElectrotechniqueEuropisches Komitee fr Elektrotechnische Normung CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members. Ref. No. EN 61255:2014 E EN 61255:2014 -
11、 2 - Foreword The text of document 59C/182/FDIS, future edition 2 of IEC 61255, prepared by SC 59C “Heating appliances“ of IEC/TC 59 “Performance of household and similar electrical appliances“ was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61255:2014. The following dat
12、es are fixed: latest date by which the document has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2015-05-14 latest date by which the national standards conflicting with the document have to be withdrawn (dow) 2017-08-14 This document su
13、persedes EN 61255:1994. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CENELEC and/or CEN shall not be held responsible for identifying any or all such patent rights. Endorsement notice The text of the International Standard IEC
14、61255:2014 was approved by CENELEC as a European Standard without any modification. In the official version, for Bibliography, the following notes have to be added for the standards indicated: IEC 60335-2-17 NOTE Harmonized as EN 60335-2-17. ISO 3758 NOTE Harmonized as EN ISO 3758. BS EN 61255:2014-
15、 3 - EN 61255:2014 Annex ZA (normative) Normative references to international publications with their corresponding European publications The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only th
16、e edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD applies. NOTE 2 Up-to-date information on the
17、latest versions of the European Standards listed in this annex is available here: www.cenelec.eu. Publication Year Title EN/HD Year IEC 62301 (mod) 2011 Household electrical appliances - Measurement of standby power EN 50564 2011 ISO 2439 - Flexible cellular polymeric materials - Determination of ha
18、rdness (indentation technique) EN ISO 2439 - BS EN 61255:2014 2 IEC 61255:2014 IEC 2014 CONTENTS 1 Scope 5 2 Normative references 5 3 Terms and definitions 5 4 Classification of heating pads 6 4.1 General . 6 4.2 Means of temperature regulation . 6 4.3 Type of supply 6 4.4 Application 6 4.5 Method o
19、f cleaning 6 4.6 Period of use 6 5 List of measurements 6 6 General conditions for measurements 7 7 Dimensions, mass and textile composition . 7 7.1 Dimensions . 7 7.2 Mass . 8 7.3 Textile composition . 8 8 Evenness of temperature . 8 9 Heating-up time and energy consumption 9 10 Cyclic variation 10
20、 11 Effect of laundering on dimensions 10 Bibliography 11 Figure 1 Heated area showing the layout of the plates . 8 Figure 2 Heated area showing the layout of the disks 9 BS EN 61255:2014IEC 61255:2014 IEC 2014 5 HOUSEHOLD ELECTRIC HEATING PADS METHODS FOR MEASURING PERFORMANCE 1 Scope This Internat
21、ional Standard applies to electric heating pads for household use. This International Standard defines the main performance characteristics of electric heating pads and specifies methods for measuring these characteristics, for the information of users. This International Standard does not specify v
22、alues for performance characteristics. NOTE This International Standard does not deal with safety requirements that are covered by IEC 60335-2-17. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its applicatio
23、n. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 62301:2011, Household electrical appliances Measurement of standby power ISO 2439, Polymeric materials, cellular flexible Determinati
24、on of hardness (indentation technique) 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 heating pad appliance comprising a flexible part having a heated area not exceeding 0,3 m2on each face and which is intended to heat part of the human body
25、 Note 1 to entry: If the pad is constructed in a cylindrical or similar form, the limit for heated area is 0,6 m2. 3.2 flexible part all layers of material forming the permanent enclosure of the appliance together with the heating element, thermostats and all other current-carrying parts contained w
26、ithin it Note 1 to entry: The flexible part may be inside a detachable cover. 3.3 heated area area of the flexible part enclosed within the outer perimeter of the heating element or electro-conductive textile Note 1 to entry: The heated area includes a margin outside the perimeter that has a width e
27、qual to 0,5 times the average distance between adjacent runs of the heating element. Note 2 to entry: The heated area includes the return length of the heating element if the average distance between this part and the adjacent heating element does not exceed the average distance between adjacent run
28、s of the heating element. BS EN 61255:2014 6 IEC 61255:2014 IEC 2014 Note 3 to entry: If the heating pad has two separate heated areas, the surface between the two areas is considered to be part of the heated areas, if at any place the distance between the two heating elements does not exceed 1,5 ti
29、mes the average distance between adjacent runs of the heating element. 4 Classification of heating pads 4.1 General The classifications of the appliance are stated. 4.2 Means of temperature regulation Heating pads are classified according to the means of temperature regulation: heating pad with a co
30、ntrol having continuously variable settings; heating pad with a control having step settings. 4.3 Type of supply Heating pads are classified according to the type of supply: heating pad for direct connection to the supply mains; extra low voltage heating pad. NOTE An extra low voltage heating pad ha
31、s a rated voltage not exceeding 24 V. 4.4 Application Heating pads are classified according to their application: heating pad for dry application; heating pad for moist application including cosmetics. 4.5 Method of cleaning Heating pads are classified according to the method of cleaning: washable b
32、y hand machine washable not washable 4.6 Period of use Heating pads are classified according to the period of use: heating pads having a time-based operation heating pads for continuous use 5 List of measurements Performance is determined by means of the following measurements: dimensions mass and t
33、extile composition (Clause 7); evenness of temperature (Clause 8); heating-up time and energy consumption (Clause 9); cyclic variation (Clause 10); effect of laundering (Clause 11). BS EN 61255:2014IEC 61255:2014 IEC 2014 7 6 General conditions for measurements Unless otherwise specified, measuremen
34、ts are made under the following conditions: a) Test room: The tests are carried out in a draught-free room in which the ambient temperature is maintained at 20 C 5 C. b) Supply voltage: The supply voltage is maintained at the rated voltage 1 %. When the heating pad is marked with a rated voltage ran
35、ge, the test report shall state the voltage used for the test. NOTE 1 If the results obtained by testing the heating pad at rated voltage are considered to be misleading due to the national supply voltage, the heating pad can also be tested at a voltage corresponding to the nominal voltage of the na
36、tional supply system. c) Arrangement of the heating pad: The flexible part with any detachable cover fitted placed between sheets of thermal insulation, the size of which is such that the edges extend at least 100 mm beyond the out- line of the heated area. The thermal insulation is made of open-cel
37、l polyether having cell count 18 + 2 per cm; specific mass 30 kg/m3+ 10 %; hardness between 120 N and 170 N at 40 % impression measured according to ISO 2439. The thermal insulation is supported over its entire area by a piece of plywood 20 mm thick, situated not less than 300 mm above the floor. Th
38、e thickness of the thermal insulation under the heating pad is approximately 72 mm and over the heating pad approximately 36 mm. NOTE 2 The specification of the thermal insulation is taken from IEC 60335-2-17. 7 Dimensions, mass and textile composition 7.1 Dimensions 7.1.1 The areas of the flexible
39、part and the heated area are determined. The heating pad is spread out without tension on a flat surface and the length and width are measured at five evenly distributed places. The average values of the area of the flexible part and the heated area are calculated. The areas are stated in squared me
40、tres (m2). If the pad is not rectangular, its shape is stated. 7.1.2 The lengths of flexible cords are determined. The measurements are made, as applicable, between the cord-entry of the flexible part and the control or the transformer; the control or the transformer and the plug. The lengths are st
41、ated in metres (m), rounded down to the nearest 0,05 m. BS EN 61255:2014 8 IEC 61255:2014 IEC 2014 7.2 Mass The mass of the heating pad and its cover, if any, is determined. The mass of the heating pad and the cover, if any, are stated separately and are measured in grams (g), rounded up to the near
42、est 10 g. 7.3 Textile composition The textile composition of the external surface of the heating pad and its cover, if any, is stated. 8 Evenness of temperature The evenness of temperature of the heated area is determined. The temperature rise of the surface of the flexible part is measured by means
43、 of thermocouples attached to the centre of copper plates having dimensions of 65 mm 65 mm 0,5 mm. The plates are placed over the flexible part as shown in Figure 1 so that as many plates as possible cover the surface. If the length of the shortest side of the heated area is less than 100 mm, the te
44、mperature rise is measured instead by thermocouples attached to copper disks having a diameter of 15 mm and a thickness of 1,0 mm. The distance between the centres of adjacent disks is 25 mm. An example of layout is shown in Figure 2. No part of any plate is to project outside of the heated area. Fi
45、gure 1 Heated area showing the layout of the plates IEC 100 mm65 mm65 mm 100 mm BS EN 61255:2014IEC 61255:2014 IEC 2014 9 No part of any plate is to project outside of the heated area. Figure 2 Heated area showing the layout of the disks The test is carried out with the control adjusted to the maxim
46、um setting and the temperature rises are measured when steady conditions are established or at the end of a cycle of operation. The average temperature rise is calculated from all the measurements. The difference between the maximum and minimum temperature rises is also calculated. NOTE If there is
47、more than one heated area, the calculations are made for each heated area separately. The uniformity factor is calculated, being the percentage of the heated area which is within 2 K of the average temperature rise. The evenness of temperature is expressed as the difference between the maximum and m
48、inimum temperature rises, rounded to the nearest 1 K, and the uniformity factor, rounded to the nearest 1 %. 9 Heating-up time and energy consumption The time taken for the temperature rise of a representative measuring point to rise by 20 K during the test of Clause 8 is stated in minutes (min), ro
49、unded to the nearest 1 min, as the heating-up time. The ambient temperature is maintained at 20C 2C and the heating pad is conditioned for at least 24 h at this temperature before starting the test. The temperature rise is measured by means of a thermocouple attached to the centre of a copper plate having dimensions of 65 mm 65 mm 0,5 mm, which is placed in the centre of the heated area. The control is adjusted to the maximum setting and the heating
