EN IEC 60335-2-51:2023

SLOVENSKI STANDARD
01-januar-2024
Gospodinjski in podobni električni aparati - Varnost - 2-51. del: Posebne zahteve
za vgrajene obtočne črpalke za grelne sisteme in vodovodne instalacije (IEC 60335
-2-51:2019)
Household and similar electrical appliances - Safety - Part 2-51: Particular requirements
for stationary circulation pumps for heating and service water installations (IEC 60335-2-
51:2019)
Sicherheit elektrischer Geräte für den Hausgebrauch und ähnliche Zwecke - Teil 2-51:
Besondere Anforderungen für ortsfeste Umwälzpumpen für Heizungs- und
Brauchwasseranlagen (IEC 60335-2-51:2019)
Appareils électrodomestiques et analogues - Sécurité - Partie 2-51: Exigences
particulières pour les pompes de circulation fixes pour installations de chauffage et de
distribution d'eau (IEC 60335-2-51:2019)
Ta slovenski standard je istoveten z: EN IEC 60335-2-51:2023
ICS:
23.080 Črpalke Pumps
91.140.10 Sistemi centralnega Central heating systems
ogrevanja
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60335-2-51

NORME EUROPÉENNE
EUROPÄISCHE NORM October 2023
ICS 23.080; 91.140.10 Supersedes EN 60335-2-51:2003; EN 60335-2-
51:2003/A1:2008; EN 60335-2-51:2003/A2:2012
English Version
Household and similar electrical appliances - Safety - Part 2-51:
Particular requirements for stationary circulation pumps for
heating and service water installations
(IEC 60335-2-51:2019)
Appareils électrodomestiques et analogues - Sécurité - Sicherheit elektrischer Geräte für den Hausgebrauch und
Partie 2-51: Exigences particulières pour les pompes de ähnliche Zwecke - Teil 2-51: Besondere Anforderungen für
circulation fixes pour installations de chauffage et de ortsfeste Umwälzpumpen für Heizungs- und
distribution d'eau Brauchwasseranlagen
(IEC 60335-2-51:2019) (IEC 60335-2-51:2019)
This European Standard was approved by CENELEC on 2023-08-02. 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 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 its 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 60335-2-51:2023 E

European foreword
This document (EN IEC 60335-2-51:2023) consists of the text of IEC 60335-2-51:2019 prepared by
IEC/TC 61 “Safety of household and similar electrical appliances”.
The following dates are fixed:
• latest date by which this document has to be (dop) 2024–08–02
implemented at national level by publication of an
identical national standard or by endorsement
• latest date by which the national standards conflicting (dow) 2026–08–02
with this document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document is read in conjunction with EN IEC 60335-2-51:2023/A11:2023.
This document has been prepared under a standardization request addressed to CENELEC by the
European Commission. The Standing Committee of the EFTA States subsequently approves these
requests for its Member States.
For the relationship with EU Directives see informative Annexes ZZA, which is an integral part of
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 60335-2-51:2019 was approved by CENELEC as a European
Standard without any modification.

IEC 60335-2-51 ®
Edition 4.0 2019-04
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Household and similar electrical appliances – Safety –

Part 2-51: Particular requirements for stationary circulation pumps for heating

and service water installations

Appareils électrodomestiques et analogues – Sécurité –

Partie 2-51: Exigences particulières pour les pompes de circulation fixes pour

installations de chauffage et de distribution d'eau

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 23.080; 91.140.10 ISBN 978-2-8322-6811-7

– 2 – IEC 60335-2-51:2019 © 2019
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 General requirement . 7
5 General conditions for the tests . 7
6 Classification . 7
7 Marking and instructions . 8
8 Protection against access to live parts . 8
9 Starting of motor-operated appliances . 8
10 Power input and current . 8
11 Heating . 9
12 Void . 9
13 Leakage current and electric strength at operating temperature . 9
14 Transient overvoltages . 9
15 Moisture resistance . 9
16 Leakage current and electric strength . 9
17 Overload protection of transformers and associated circuits . 10
18 Endurance . 10
19 Abnormal operation . 10
20 Stability and mechanical hazards . 10
21 Mechanical strength . 10
22 Construction . 10
23 Internal wiring . 10
24 Components . 11
25 Supply connection and external flexible cords . 11
26 Terminals for external conductors . 11
27 Provision for earthing . 11
28 Screws and connections . 11
29 Clearances, creepage distances and solid insulation . 11
30 Resistance to heat and fire . 11
31 Resistance to rusting . 11
32 Radiation, toxicity and similar hazards . 11
Annexes . 12
Annex A (informative) Routine tests . 12
Bibliography . 13

Table 101 – Temperature classification of circulation pumps . 7

IEC 60335-2-51:2019 © 2019 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –

Part 2-51: Particular requirements for stationary circulation pumps
for heating and service water installations

FOREWORD
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