Power transformers - Part 22-6: Power transformer and reactor cooling equipment - Fans

IEC 60076-22-6:2021 covers the electric fans used in the cooling circuits of power transformers and reactors. It applies to electric fans mounted on liquid immersed power transformers according to IEC 60076-1 and reactors according to IEC 60076-6 with and without conservator for indoor or outdoor installation. It outlines the service conditions and the mechanical and electrical requirements that are common to all the equipment.
The electric fans concerned by this document are of the axially operating type and are for use on liquid to air coolers and for blowing out radiators.
This document also outlines the operation requirements specific to each equipment as well as the preferred dimensions relevant for interchangeability and uniform fan assembly and the type and routine tests to be performed.

Leistungstransformatoren - Teil 22-6: Kühleinrichtungen für Leistungstransformatoren und Drosselspulen - Ventilatoren

Transformateurs de puissance - Partie 22-6: Accessoires pour transformateurs de puissance et bobines d'inductance - Ventilateurs électriques pour transformateurs

L’IEC 60076-22-6:2021 couvre les ventilateurs électriques utilisés dans les circuits de refroidissement des transformateurs de puissance et des bobines d’inductance. Elle s’applique aux ventilateurs électriques montés sur des transformateurs de puissance immergés dans un liquide conformes à l'IEC 60076-1 et des bobines d’inductance conformes à l’IEC 60076­6 avec et sans conservateur pour des installations intérieures ou extérieures. Elle définit les conditions de service et les exigences mécaniques et électriques communes à tous ces équipements. Les ventilateurs électriques concernés par le présent document sont de type à fonctionnement axial et sont destinés à être utilisés sur des aéroréfrigérants et pour souffler sur des radiateurs. Le présent document donne également les exigences de fonctionnement spécifiques à chaque équipement ainsi que les dimensions préférentielles pertinentes pour l’interchangeabilité et l'assemblage uniforme du ventilateur, avec également les essais de type et individuels de série à réaliser.

Močnostni transformatorji - 22-6. del: Oprema močnostnega transformatorja in dušilke - Ventilatorji

General Information

Status
Published
Publication Date
03-May-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
06-Apr-2021
Due Date
11-Jun-2021
Completion Date
04-May-2021

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SLOVENSKI STANDARD
SIST EN IEC 60076-22-6:2021
01-junij-2021
Nadomešča:
SIST EN 50216-12:2011
Močnostni transformatorji - 22-6. del: Oprema močnostnega transformatorja in
dušilke - Ventilatorji

Power transformers - Part 22-6: Power transformer and reactor cooling equipment - Fans

Ta slovenski standard je istoveten z: EN IEC 60076-22-6:2021
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
SIST EN IEC 60076-22-6:2021 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN IEC 60076-22-6:2021
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SIST EN IEC 60076-22-6:2021
EUROPEAN STANDARD EN IEC 60076-22-6
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2021
ICS 29.180
English Version
Power transformers - Part 22-6: Power transformer and reactor
fittings - Electric fans for transformers
(IEC 60076-22-6:2021)

Transformateurs de puissance - Partie 22-6: Accessoires Leistungstransformatoren - Teil 22-6: Kühleinrichtungen für

pour transformateurs de puissance et bobines d'inductance Leistungstransformatoren und Drosselspulen - Ventilatoren

- Ventilateurs électriques pour transformateurs (IEC 60076-22-6:2021)
(IEC 60076-22-6:2021)

This European Standard was approved by CENELEC on 2021-02-22. 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,

Turkey 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

© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN IEC 60076-22-6:2021 E
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SIST EN IEC 60076-22-6:2021
EN IEC 60076-22-6:2021 (E)
European foreword

The text of document 14/1022/CDV, future edition 1 of IEC 60076-22-6, prepared by IEC/TC 14

"Power transformers" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC

as EN IEC 60076-22-6:2021.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2021-11-22

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2024-02-22

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.

Endorsement notice

The text of the International Standard IEC 60076-22-6:2021 was approved by CENELEC as a

European Standard without any modification.

In the official version, for Bibliography, the following note has to be added for the standard indicated:

IEC 60076-6 NOTE Harmonized as EN 60076-6
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SIST EN IEC 60076-22-6:2021
EN IEC 60076-22-6:2021 (E)
Annex ZA
(normative)
Normative references to international publications with their
corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments)

applies.

NOTE 1 Where 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 latest versions of the European Standards listed in this annex is available

here: www.cenelec.eu.
Publication Year Title EN/HD Year
IEC 60034-1 - Rotating electrical machines - Part 1: Rating - -
and performance
IEC 60076-1 2011 Power transformers - Part 1: General EN 60076-1 2011
IEC 60076-10 - Power transformers - Part 10: Determination EN 60076-10 -
of sound levels
IEC 60529 - Degrees of protection provided by enclosures - -
(IP Code)
ISO 281 - Rolling bearings - Dynamic load ratings and - -
rating life
ISO 5801 2017 Fans - Performance testing using EN ISO 5801 2017
standardized airways
ISO 9227 - Corrosion tests in artificial atmospheres - Salt EN ISO 9227 -
spray tests
ISO 12944 series Paints and varnishes - Corrosion protection of - -
steel structures by protective paint systems
ISO 13347-1 - Industrial fans - Determination of fan sound - -
power levels under standardized laboratory
conditions - Part 1: General overview
ISO 13347-3 - Industrial fans - Determination of fan sound - -
power levels under standardized laboratory
conditions - Part 3: Enveloping surface
methods
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SIST EN IEC 60076-22-6:2021
EN IEC 60076-22-6:2021 (E)
Publication Year Title EN/HD Year
ISO 13348 - Industrial fans - Tolerances, methods of - -
conversion and technical data presentation
ISO 13857 2019 Safety of machinery - Safety distances to EN ISO 13857 2019
prevent hazard zones being reached by
upper and lower limbs
ISO 14694 - Industrial fans - Specifications for balance - -
quality and vibration levels
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SIST EN IEC 60076-22-6:2021
IEC 60076-22-6
Edition 1.0 2021-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Power transformers –

Part 22-6: Power transformer and reactor fittings – Electric fans for transformers

Transformateurs de puissance –
Partie 22-6: Accessoires pour transformateurs de puissance et bobines
d'inductance – Ventilateurs électriques pour transformateurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180 ISBN 978-2-8322-9252-5

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
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SIST EN IEC 60076-22-6:2021
– 2 – IEC 60076-22-6:2021 © IEC:2021
CONTENTS

FOREWORD ........................................................................................................................... 3

1 Scope .............................................................................................................................. 5

2 Normative references ...................................................................................................... 5

3 Terms and definitions ...................................................................................................... 6

4 Service conditions ........................................................................................................... 6

4.1 General ................................................................................................................... 6

4.2 Degree of protection of electrical components (IP) .................................................. 6

4.3 Corrosion protection ............................................................................................... 6

5 General characteristics and requirements ........................................................................ 7

5.1 Main components and characteristics ..................................................................... 7

5.1.1 Nameplate and rating plates ............................................................................ 7

5.1.2 Motor drive ...................................................................................................... 7

5.1.3 Connection box ................................................................................................ 8

5.1.4 Housing ........................................................................................................... 8

5.1.5 Fan wheel ........................................................................................................ 8

5.1.6 Protective grating ............................................................................................ 8

5.1.7 Materials ......................................................................................................... 9

5.1.8 Vibration limits ................................................................................................. 9

5.2 Supply conditions .................................................................................................... 9

5.2.1 Transport and storage ..................................................................................... 9

5.2.2 Installation and operation, operational performance ......................................... 9

5.2.3 Technical documentation ................................................................................. 9

5.3 Performance requirements .................................................................................... 10

5.3.1 General ......................................................................................................... 10

5.3.2 Rated values ................................................................................................. 10

5.3.3 Ambient conditions for rated power and noise ................................................ 10

5.4 Tests .................................................................................................................... 10

5.4.1 General ......................................................................................................... 10

5.4.2 List of tests .................................................................................................... 11

5.4.3 Routine tests ................................................................................................. 11

5.4.4 Type tests ...................................................................................................... 11

Annex A (normative) Ordering designations ......................................................................... 12

A.1 Minimal ordering designations ............................................................................... 12

A.2 Additional specifications (if necessary) ................................................................. 12

Annex B (informative) Performance of the fans – Typical fan characteristic speed

controlled curves .................................................................................................................. 13

Annex C (informative) Design examples ............................................................................... 14

Bibliography .......................................................................................................................... 16

Figure B.1 – Performance of the fans .................................................................................... 13

Figure C.1 – Fan design example ......................................................................................... 14

Figure C.2 – Fan design example with guide vane ................................................................ 15

Table C.1 – Common selection of materials used in the construction .................................... 15

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SIST EN IEC 60076-22-6:2021
IEC 60076-22-6:2021 © IEC:2021 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER TRANSFORMERS –
Part 22-6: Power transformer and reactor fittings –
Electric fans for transformers
FOREWORD

1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising

all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international

co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and

in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,

Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their

preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with

may participate in this preparatory work. International, governmental and non-governmental organizations liaising

with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for

Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international

consensus of opinion on the relevant subjects since each technical committee has representation from all

interested IEC National Committees.

3) IEC Publications have the form of recommendations for international use and are accepted by IEC National

Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC

Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any

misinterpretation by any end user.

4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications

transparently to the maximum extent possible in their national and regional publications. Any divergence between

any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.

5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity

assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any

services carried out by independent certification bodies.

6) All users should ensure that they have the latest edition of this publication.

7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and

members of its technical committees and IEC National Committees for any personal injury, property damage or

other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and

expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.

8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is

indispensable for the correct application of this publication.

9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent

rights. IEC shall not be held responsible for identifying any or all such patent rights.

IEC 60076-22-6 has been prepared by IEC technical committee 14: Power transformers. It is

an International Standard.
The text of this International Standard is based on the following documents:
Draft Report on voting
14/1022/CDV 14/1041A/RVC

Full information on the voting for its approval can be found in the report on voting indicated in

the above table.
The language used for the development of this International Standard is English.

This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in

accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available

at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are

described in greater detail at www.iec.ch/standardsdev/publications.
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SIST EN IEC 60076-22-6:2021
– 4 – IEC 60076-22-6:2021 © IEC:2021

A list of all parts in the IEC 60076 series, published under the general title Power transformers,

can be found on the IEC website.

The committee has decided that the contents of this document will remain unchanged until the

stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to

the specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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SIST EN IEC 60076-22-6:2021
IEC 60076-22-6:2021 © IEC:2021 – 5 –
POWER TRANSFORMERS –
Part 22-6: Power transformer and reactor fittings –
Electric fans for transformers
1 Scope
This part of IEC 60076 covers the electric fans used in the cooling ci
...

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