BS-EN-60335-2-51-1997 IEC-60335-2-51-1997.pdf

BRITISH STANDARD BS EN 60335-2-51: 1997 IEC 60335-2-51: 1997 Incorporating Amendment No. 1Safety of household and similar electrical appliances Part 2: Particular requirements Section 2.51 Stationary circulation pumps for heating and service water installations The European Standard EN 60335-2-51:1997 has the status of a British Standard ICS 23.080 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:14:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-51:1997 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1997 © BSI 04-1999 ISBN 0 580 27815 8 National foreword This British Standard is the English language version of EN 60335-2-51:1997. It is identical with IEC 60335-2-51:1997. It supersedes BS EN 60335-2-51:1991 which will be withdrawn on 2000-07-01. The UK participation in its preparation was entrusted to Technical Committee CPL/61, Safety of electrical appliances, CPL/61, Safety of electrical appliances, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee 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 60027-1. For a period of time during the change over from one numbering system to the other, publications may contain identifiers from both systems. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their corresponding or European publications. The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the 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. 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 and a back cover. This standard 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. Amendments issued since publication Amd. No.DateComments 9883January 1998Replacement front cover to correct the title Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:14:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60335-2-51:1997 © BSI 04-1999i Contents Page National forewordInside front cover Foreword2 Text of EN 60335-2-515 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:14:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:14:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 60335-2-51 September 1997 ICS 23.080Supersedes EN 60335-2-51:1991 Descriptors: Household electrical appliances, heating installations, water distributions, pump, safety requirements, protection against electric shock, fire protection, protection against mechanical hazard English version Safety of household and similar electrical appliances Part 2: Particular requirements for stationary circulation pumps for heating and service water installations (IEC 60335-2-51:1997) Sécurité des appareils électrodomestiques et analogues Partie 2: Règles particulières pour les pompes de circulation fixes pour installations de chauffage et de distribution deau (CEI 60335-2-51:1997) Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke Teil 2: Besondere Anforderungen für ortsfeste Umwälzpumpen für Heizungs- und Brauchwasseranlagen (IEC 60335-2-51:1997) This European Standard was approved by CENELEC on 1997-07-01. 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 concerning 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 into 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, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels © 1997 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60335-2-51:1997 E Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:14:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-51:1997 © BSI 04-1999 2 Foreword The text of document 61/951/FDIS, future second edition of IEC 60335-2-51, prepared by the IEC Technical Committee 61 was submitted to the IEC-CENELEC parallel vote in March 1996 but the draft did not receive sufficient support in CENELEC. The comments were discussed during the Athens meeting in November 1996, when it was decided to submit a draft for EN 60335-2-51 based on the printed version of the IEC standard to the formal vote. This draft was circulated in April 1997 and was approved by CENELEC as EN 60335-2-51 on 1997-07-01. This European Standard has been prepared by the secretariat of CENELEC Technical Committee TC 61. The following dates are applicable: For products which have complied with EN 60335-2-51:1991 before 2000-07-01, as shown by the manufacturer or by a certification body, this previous standard may continue to apply for production until 2005-07-01. This standard has to be used in conjunction with EN 60335-1, Safety of household and similar electrical appliances, Part 1: General requirements. It was established on the basis of the 1994 edition of that standard. Amendments and revisions of part 1 have also to be taken into account and the dates when such changes become applicable will be stated in the relevant amendment or revision of part 1. This part 2 supplements or modifies the corresponding clauses of EN 60335-1, so as to convert it into the European Standard: Safety requirements for stationary electric circulation pumps for heating and service water installations. When a particular subclause of part 1 is not mentioned in this part 2, that subclause applies as far as is reasonable. When this standard states “addition”, “modification” or “replacement”, the relevant text of part 1 is to be adapted accordingly. Subclauses and tables which are additional to those in part 1 are numbered starting with 101. There are no special national conditions causing a deviation from this European Standard, other than those listed in Annex ZA to EN 60335-1. There are no national deviations from this European Standard, other than those listed in Annex ZB to EN 60335-1. NOTEThe following print types are used: requirements: in roman type; test specifications: in italic type; notes: in small roman type. Words in bold in the text are defined in clause 2. When a definition of part 1 concerns an adjective, the adjective and the associated noun are also in bold. Endorsement notice The text of the International Standard IEC 60335-2-51:1997 was approved by CENELEC as a European Standard without any modification. latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1998-07-01 date on which national standards conflicting with the EN have to be withdrawn(dow) 2000-07-01 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:14:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-51:1997 © BSI 04-19993 Contents Page Foreword2 1Scope5 2Definitions5 3General requirement5 4General conditions for the tests5 5Void5 6Classification5 7Marking and instructions5 8Protection against access to live parts6 9Starting of motor-operated appliances6 10Power input and current6 11Heating6 12Void6 13Leakage current and electric strength at operating temperature 6 14Void6 15Moisture resistance6 16Leakage current and electric strength6 17Overload protection of transformers and associated circuits6 18Endurance6 19Abnormal operation6 20Stability and mechanical hazards6 21Mechanical strength6 22Construction7 23Internal wiring7 24Components7 25Supply connection and external flexible cords7 26Terminals for external conductors7 27Provision for earthing7 28Screws and connections7 29Creepage distances, clearances and distances through insulation7 30Resistance to heat, fire and tracking7 31Resistance to rusting7 32Radiation, toxicity and similar hazards7 Annexes8 Table 101 Classification of pumps5 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:14:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 4 blank Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:14:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-51:1997 © BSI 04-19995 1 Scope This clause of part 1 is replaced by: This standard deals with the safety of stationary electric circulation pumps intended for use in heating systems or in service water systems, having a rated power input not exceeding 300 W, their rated voltage is not more than 250 V for single-phase appliances and 480 V for other appliances. Appliances not intended for normal household use, but which nevertheless may be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard. So far as is practicable, this standard deals with the common hazards presented by appliances which are encountered by all persons in and around the home. This standard does not in general take into account the use of appliances by young children or infirm persons without supervision; playing with the appliance by young children. NOTE 1Attention is drawn to the fact that for appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary; for appliances intended to be used in tropical countries, special requirements may be necessary; in many countries additional requirements are specified by the national health authorities, the national authorities responsible for the protection of labour and similar authorities. NOTE 2This standard does not apply to pumps for circulating liquids other than water; pumps other than circulation pumps (IEC 335-2-41); circulation pumps intended exclusively for industrial purposes; circulation pumps intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour, or gas). 2 Definitions This clause of part 1 is applicable except as follows: 2.2.9 Replacement: normal operation operation of the circulation pump in accordance with the instructions, the water pressure and flow rate being adjusted so that the highest power input is attained 2.101 circulation pump combination of mechanical, hydraulic and electrical parts of an appliance for circulating water NOTEThe hydraulic and electrical parts may be in the same enclosure, so that the water flows through the motor and serves as a coolant, or they may be separated. 3 General requirement This clause of part 1 is applicable. 4 General conditions for the tests This clause of part 1 is applicable except as follows: 4.7 Addition: The water temperature at the inlet of the pump is that corresponding to the TF class of the pump, with a tolerance of 5 °C. Pumps intended to be located within the enclosure of a boiler are tested at an ambient temperature of 55 °C or at the temperature specified in the instructions, whichever is higher. NOTEThe temperature rise limits specified in this standard are to be reduced by the difference between the ambient temperature at which the test is carried out and 25 °C. 4.101 Pumps having a three-phase motor which does not incorporate a protective device are installed with an appropriate device, in accordance with the instructions. 5 Void 6 Classification This clause of part 1 is applicable except as follows: 6.1 Replacement: Circulation pumps shall be of class I, class II or class III. Compliance is checked by inspection and by the relevant tests. 6.2 Addition: Circulation pumps shall be at least IPX2. 6.101 Circulation pumps shall be of one of the classes shown in Table 101. Table 101 Classification of pumps 7 Marking and instructions This clause of part 1 is applicable except as follows: 7.1 Addition: Pumps shall be marked with: the TF class; the direction of the water flow. ClassMaximum temperature of the circulating water °C TF60 TF95 TF 110 60 95 110 Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 09 08:14:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 60335-2-51:1997 6 © BSI 04-1999 Pumps having a three-phase motor shall also be marked with: the direction of rotation; the rated current, if a protective device is to be installed in the fixed wiring. 7.12.1 Addition: The instructions for installation shall specify the maximum flow rate or total head; the maximum ambient temperature at which the pump is to be used; the maximum system pressure, which is to be not less than: 0,6 MPa (6 bar), for pumps for heating systems; 1,0 MPa (10 bar), for pumps for service water systems; the orientation of the pump; that a protective device is to be installed in the fixed wiring, for pumps having a three-phase motor not incorporating a protective device. The characteristics of the device shall be given. 8 Protection against access to live parts This clause of part 1 is applicable. 9 Starting of motor-operated appliances This clause of part 1 is not applicable. 10 Power input and current This clause of part 1 is applicable. 11 Heating This clause of part 1 is applicable except as follows: 11.2 Addition: NOTEIf the pump has means for f