Power transformers - Part 22-2: Power transformer and reactor fittings - Removable radiators

IEC 60076-22-2:2019 applies to radiators 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 this equipment. It also outlines the operation requirements specific to this equipment as well as the preferred dimensions relevant for interchangeability and the type and routine tests to be performed. Keywords: radiators mounted on liquid immersed power transformers

Leistungstransformatoren - Teil 22-2: Anbauten für Leistungstransformatoren und Drosselspulen - Abnehmbare Radiatoren

Transformateurs de puissance - Partie 22-2: Accessoires pour transformateurs de puissance et bobines d'inductance - Radiateurs détachables

IEC 60076-22-2:2019 s’applique aux radiateurs montés sur des transformateurs de puissance immergés dans un liquide conformes à l'IEC 60076-1 et aux bobines d'inductance conformes à l'IEC 60076-6 avec et sans conservateur pour les installations intérieures ou extérieures. Elle présente les conditions de service et les exigences mécaniques et électriques communes à ces équipements. Elle présente également les exigences de fonctionnement spécifiques à ces équipements et les dimensions préférentielles pertinentes pour l’interchangeabilité, ainsi que les essais de type et individuels de série à réaliser. Mots clés: radiateurs montés sur des transformateurs de puissance immergés dans un liquide

Hladilna oprema za močnostne transformatorje in dušilke – 22-2. del: Odstranljivi radiatorji

Ta standard se uporablja za radiatorje, ki so nameščeni na v tekočini potopljenih močnostnih transformatorjih v skladu s standardom IEC 60076-1 in reaktorje v skladu s standardom IEC 60076-6 z raztezno posodo in brez nje za notranjo ter zunanjo namestitev. V njem so opisani servisni pogoji ter mehanske in električne zahteve, ki so skupne tej opremi. Določa tudi obratovalne zahteve za posamezno opremo in prednostne dimenzije, ki so pomembne za izmenljivost ter rutinske in tipske preskuse, ki jih je treba opraviti.

General Information

Status
Published
Publication Date
27-Jun-2019
Technical Committee
Drafting Committee
Current Stage
6060 - Document made available
Due Date
28-Jun-2019
Completion Date
28-Jun-2019

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SLOVENSKI STANDARD
SIST EN IEC 60076-22-2:2019
01-november-2019

Hladilna oprema za močnostne transformatorje in dušilke – 22-2. del: Odstranljivi

radiatorji
Power transformer and reactor cooling equipment - Part 22-2: Removable radiators
Ta slovenski standard je istoveten z: EN IEC 60076-22-2:2019
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
SIST EN IEC 60076-22-2:2019 en

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

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SIST EN IEC 60076-22-2:2019
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SIST EN IEC 60076-22-2:2019
EUROPEAN STANDARD EN 60076-22-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2019
ICS 29.180
English Version
Power transformer and reactor cooling equipment - Part 22-2:
Removable radiators
(IEC 60076-22-2:2019)

Transformateurs de puissance - Partie 22-2: Accessoires Leistungstransformatoren und Drosselspulen

pour transformateurs de puissance et bobines d'inductance Kühlungseinrichtung - Teil 22-2: Abnehmbare Kühler

- Radiateurs détachables (IEC 60076-22-2:2019)
(IEC 60076-22-2:2019)

This European Standard was approved by CENELEC on 2019-02-20. 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, 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

© 2019 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 60076-22-2:2019 E
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SIST EN IEC 60076-22-2:2019
EN 60076-22-2:2019 (E)
European foreword

The text of document 14/895/CDV, future edition 1 of IEC 60076-22-2, prepared by IEC/TC 14 "Power

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

EN 60076-22-2:2019.
The following dates are fixed:

• latest date by which the document has to be implemented at national (dop) 2019-12-28

level by publication of an identical national standard or by endorsement

• latest date by which the national standards conflicting with the (dow) 2022-06-28

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 60076-22-2:2019 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 60076-22-2:2019
EN 60076-22-2:2019 (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 60076-1 - Power transformers - Part 1: General EN 60076-1 -
IEC 60076-7 - Power transformers -- Part 7: Loading guide - -
for oil-immersed power transformers
IEC 60296 - Fluids for electrotechnical applications - EN 60296 -
Unused mineral insulating oils for
transformers and switchgear
ISO 4406 - Hydraulic fluid power – Fluids - Method for - -
coding the level of contamination by solid
particles

ISO 12944 series Paints and varnishes - Corrosion protection EN ISO 12944 series

of steel structures by protective paint
systems - Part 1: General introduction
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SIST EN IEC 60076-22-2:2019
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SIST EN IEC 60076-22-2:2019
IEC 60076-22-2
Edition 1.0 2019-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Power transformers –
Part 22-2: Power transformer and reactor fittings – Removable radiators
Transformateurs de puissance –
Partie 22-2: Accessoires pour transformateurs de puissance et bobines
d'inductance – Radiateurs détachables
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180 ISBN 978-2-8322-5669-5

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 60076-22-2:2019
– 2 – IEC 60076-22-2:2019 © IEC 2019
CONTENTS

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

INTRODUCTION ..................................................................................................................... 5

1 Scope .............................................................................................................................. 6

2 Normative references ...................................................................................................... 6

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

4 General requirements ...................................................................................................... 7

4.1 General ................................................................................................................... 7

4.2 External corrosion protection .................................................................................. 7

4.3 Internal corrosion protection ................................................................................... 7

4.4 Insulating liquid characteristics ............................................................................... 7

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

5.1 Main components .................................................................................................... 7

5.2 Radiator types defined in this document .................................................................. 8

5.3 Materials ................................................................................................................. 8

5.4 Dimensions and tolerances ..................................................................................... 8

5.5 Preparation for transport and storage ...................................................................... 9

5.6 Identification of radiators......................................................................................... 9

6 Tests ............................................................................................................................... 9

6.1 Routine tests........................................................................................................... 9

6.1.1 Tightness tests ................................................................................................ 9

6.1.2 Surfaces ........................................................................................................ 10

6.2 Type tests ............................................................................................................. 10

6.2.1 Cooling performance ..................................................................................... 10

6.2.2 Vacuum resistance type test .......................................................................... 17

7 Dimensions and drawings .............................................................................................. 18

Annex A (normative) Alternative radiator designs – Dimensions and drawings ..................... 20

Bibliography .......................................................................................................................... 25

Figure 1 – Radiators' dissipation diagram ............................................................................. 11

Figure 2 – Coefficient KN ...................................................................................................... 12

Figure 3 – Coefficient KP ...................................................................................................... 12

Figure 4 – Coefficient KDH ................................................................................................... 13

Figure 5 – Test layout ........................................................................................................... 15

Figure 6 – Type FG ............................................................................................................... 18

Figure 7 – Type FR ............................................................................................................... 19

Figure A.1 – Type FA ............................................................................................................ 20

Figure A.2 – Type FG-L ........................................................................................................ 21

Figure A.3 – Type FG-R ........................................................................................................ 22

Figure A.4 – Type FAR ......................................................................................................... 23

Figure A.5 – Type FG1A (with flanges) ................................................................................. 24

Table 1 – Radiator characteristics form ................................................................................... 9

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SIST EN IEC 60076-22-2:2019
IEC 60076-22-2:2019 © IEC 2019 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER TRANSFORMERS –
Part 22-2: Power transformer and reactor fittings –
Removable radiators
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.

International Standard IEC 60076-22-2 has been prepared by IEC technical committee 14:

Power transformers.
The text of this International Standard is based on the following documents:
CDV Report on voting
14/895/CDV 14/917A/RVC

Full information on the voting for the approval of this International Standard can be found in

the report on voting indicated in the above table.

This document has been drafted in accordance with the ISO/IEC Directives, Part 2.

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

transformers, can be found on the IEC website.
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SIST EN IEC 60076-22-2:2019
– 4 – IEC 60076-22-2:2019 © IEC 2019

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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
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SIST EN IEC 60076-22-2:2019
IEC 60076-22-2:2019 © IEC 2019 – 5 –
INTRODUCTION

Under the part title “Power transformer and reactor fittings" this part of IEC 60076-22 covers

the removable radiators used in the cooling circuits of power transformers and reactors.

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SIST EN IEC 60076-22-2:2019
– 6 – IEC 60076-22-2:2019 © IEC 2019
POWER TRANSFORMERS –
Part 22-2: Power transformer and reactor fittings –
Removable radiators
1 Scope

This part of IEC 60076 applies to radiators 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 this equipment.

It also outlines the operation requirements specific to this equipment as well as the preferred

dimensions relevant for interchangeability and the type and routine tests to be performed.

2 Normative references

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.
IEC 60076-1, Power transformers – Part 1: General
IEC 60076-7, Power transformers – Part 7: Loading guide for oil-immersed power
transformers

IEC 60296, Fluids for electrotechnical applications – Unused mineral insulating oils for

transformers and switchgear

ISO 4406, Hydraulic fluid power – Fluids – Method for coding the level of contamination by

solid particles

ISO 12944 (all parts), Paints and varnishes – Corrosion protection of steel structures by

protective paint systems
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following

addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1
removable radiator

component through which the transformer insulating liquid circulates and is cooled

Note 1 to entry: The component is removable from the transformer for shipment and maintenance purposes.

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SIST EN IEC 60076-22-2:2019
IEC 60076-22-2:2019 © IEC 2019 – 7 –
Note 2 to entry: This component has natural cooling capacity.

Note 3 to entry: Radiator cooling systems can be equipped with fans and/or circulating pumps.

4 General requirements
4.1 General

The normal service conditions set out in IEC 60076-1 represent the normal scope of operation

of the equipment specified in this document.

For any unusual service conditions which require special consideration in the design of the

equipment, see IEC 60076-1; operation under such unusual service conditions shall be

subject to agreement between the purchaser and supplier, as they require special
consideration in the design of the equipment.
4.2 External corrosion protection

The materials used for the construction of the equipment and the surface treatment shall be

resistant to accidental contact with the insulating liquid and suitable to withstand the

environmental conditions given in 4.1. The corrosion protection shall be agreed between

purchaser and manufacturer according to ISO 12944 (all parts). The responsibility to specify

the correct level of corrosion protection lies with the purchaser and is dependent on the

environment where the transformer will be located and on the durability required. Unless

otherwise specified, minimum withstand level shall be C4 medium durability according to

ISO 12944-6.

Due to the specific painting process of radiators a common final colour would be a great

contribution to reducing the environmental pollution. Unless differently specified by the

purchaser, RAL 7031, 7032 or 7033 are the recommended final colours.
4.3 Internal corrosion protection

In consideration of the storage conditions and expected time between shipment and

commissioning, the corrosion protection on the inner side of the radiator shall be agreed

between purchaser and manufacturer. As a minimum requirement, precautions shall be taken

to prevent the ingress of moisture and the development of internal corrosion. The internal

flushing with insulation liquid fully miscible and compatible with the liquid to be used in

service conditions and the use of blanking plates with gaskets are considered as a minimum.

Internal painting, nitrogen filling, dehydrating material, etc., can be used as other or additional

solutions.
4.4 Insulating liquid characteristics

If not otherwise specified, the insulating liquid shall be mineral oil according to IEC 60296 and

the operating temperature shall be in accordance with IEC 60076-7.

When the insulating liquid is not mineral oil then the viscosity variation, the operating

temperature and all the other operating characteristics shall be indicated by the purchaser.

5 General characteristics and requirements
5.1 Main components
The main radiator components are:
• header; collectors on the top and bottom of the radiator;

• connection flanges; flanges which connect the radiators to the transformer tank;

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SIST EN IEC 60076-22-2:2019
– 8 – IEC 60076-22-2:2019 © IEC 2019
• cooling elements; elements of the radiator which dissipate the heat;
• lifting lugs; devices used to lift the radiator;
• securing plates; facilities to conn
...

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