EN IEC 60076-22-4:2019

Power transformers - Part 22-4: Power transformer and reactor fittings - Insulating liquid to water heat exchangers

This part of IEC 60076 applies to liquid to water heat exchangers, using forced water and forced liquid circuits, used 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.

Leistungstransformatoren und Drosselspulen Anbauten - Teil 22-4: Isolierflüssigkeit-Wasser-Wärmetauscher

Transformateurs de puissance - Partie 22-4: Accessoires pour transformateurs de puissance et bobines d’inductance – Hydroréfrigérants

La présente partie de l’IEC 60076-22 s’applique aux hydroréfrigérants, utilisant des circuits à circulation forcée d’eau et de liquide, utilisés sur des transformateurs de puissance immergés dans un liquide (conformes à l’IEC 60076-1) et des bobines d’inductance (conformes à l’IEC 60076-6) avec ou sans conservateur pour les installations intérieures ou extérieures. Elle présente les conditions de service et les exigences mécaniques et électriques communes à cet équipement. Elle présente également les exigences de fonctionnement spécifiques à cet équipement et les dimensions préférentielles pertinentes pour l’interchangeabilité, ainsi que les essasi de type et individuels de série à réaliser.

Hladilna oprema za močnostne transformatorje in dušilke – 22-4. del: Toplotni izmenjevalniki izolacijska tekočina-voda (olje-voda)

Ta standard se uporablja za vodne izmenjevalnike toplote s potisnim vodnim in tekočinskim krogom, ki se uporabljajo 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: 18-Apr-2019
• Withdrawal Date: 11-Apr-2022
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: CLC/TC 14 - Power transformers
• Drafting Committee: IEC/TC 14 - IEC_TC_14
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 19-Apr-2019
• Completion Date: 19-Apr-2019
• Ref Project: SIST EN IEC 60076-22-4:2019 - Power transformer and reactor cooling equipment - Part 22-4: Insulating liquid to water heat exchangers

Relations

• Replaces: EN 50216-9:2009 - Power transformer and reactor fittings - Part 9: Oil-to-water heat exchangers
• Effective Date: 23-Jan-2023

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2019
Hladilna oprema za močnostne transformatorje in dušilke – 22-4. del: Toplotni
izmenjevalniki izolacijska tekočina-voda (olje-voda)
Power transformer and reactor cooling equipment - Part 22-4: Insulating liquid to water
heat exchangers
Ta slovenski standard je istoveten z: EN IEC 60076-22-4:2019
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 60076-22-4

NORME EUROPÉENNE
EUROPÄISCHE NORM
April 2019
ICS 29.180
English Version
Power transformers - Part 22-4: Power transformer and reactor
fittings - Insulating liquid to water heat exchangers
(IEC 60076-22-4:2019)
Transformateurs de puissance - Partie 22-4: Accessoires Leistungstransformatoren und Drosselspulen
pour transformateurs de puissance et bobines d'inductance Kühlungseinrichtung - Teil 22-4: Isolierte Flüssigkeit-
- Hydroréfrigérants Wasser-Wärmetauscher
(IEC 60076-22-4:2019) (IEC 60076-22-4:2019)
This European Standard was approved by CENELEC on 2019-04-12. 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 IEC 60076-22-4:2019 E

European foreword
The text of document 14/996/FDIS, future edition 1 of IEC 60076-22-4, prepared by IEC/TC 14 "Power
transformers" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2020-01-12
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2022-04-12
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 60076-22-4:2019 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 60076-6 NOTE Harmonized as EN 60076-6
ISO 3506-1 NOTE Harmonized as EN ISO 3506-1
ISO 9001 NOTE Harmonized as EN ISO 9001

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
IEC 60529 -  Degrees of protection provided by enclosures - -
(IP Code)
ISO 4406 -  Hydraulic fluid power - Fluids - Method for - -
coding the level of contamination by solid
particles
ISO 12944 series Paints and varnishes - Corrosion protection of EN ISO 12944 series
steel structures by protective paint systems

IEC 60076-22-4 ®
Edition 1.0 2019-03
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Power transformers –
Part 22-4: Power transformer and reactor fittings – Insulating liquid to water

heat exchangers
Transformateurs de puissance –

Partie 22-4: Accessoires pour transformateurs de puissance et bobines

d’inductance – Hydroréfrigérants

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 29.180 ISBN 978-2-8322-6635-9

– 2 – IEC 60076-22-4:2019 © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 7
4 General requirements . 8
4.1 Service conditions . 8
4.2 Performance requirements . 8
4.3 Degree of protection of electrical components (IP) . 8
4.4 Corrosion protection . 8
4.4.1 External (atmosphere) . 8
4.4.2 Insulating liquid side . 9
4.4.3 Water side . 9
4.5 Insulating liquid characteristics . 9
5 Design and characteristics . 9
5.1 General . 9
5.2 Main components and characteristics . 9
5.2.1 General . 9
5.2.2 Shell . 9
5.2.3 Tube bundle in double tube arrangement . 9
5.2.4 Headers . 10
5.3 General characteristics . 10
5.3.1 Rating plate information . 10
5.3.2 Information to be provided with enquiry and order. 10
5.3.3 Rated cooling capacity . 11
5.3.4 Mechanical design . 11
5.3.5 Preparation for transport and storage . 13
5.3.6 Mounting and operating conditions . 14
6 Tests . 14
6.1 General requirements for tests . 14
6.1.1 General . 14
6.1.2 List of tests . 14
6.2 Routine tests. 15
6.2.1 Tightness test insulating liquid side . 15
6.2.2 Tightness test water side . 15
6.2.3 Visual inspection . 15
6.2.4 Cleanliness . 15
6.3 Type tests – Rated values test . 15
Annex A (informative) Details of the heat exchangers . 16
A.1 Masses and dimensions . 16
A.2 Collection and forms of suspensory types . 16
A.3 Collection and forms of horizontal types . 17
A.4 Collection and forms of vertical standing types. 18
A.5 Parts list – Materials – Common selection of materials . 19
A.6 Example for fresh water . 20

IEC 60076-22-4:2019 © IEC 2019 – 3 –
Annex B (informative) Rating conditions of the heat exchangers . 21
B.1 General . 21
B.2 Definitions, symbols . 21
B.3 Calculation of capacity in service . 21
B.3.1 Service capacity for different temperatures at inlet according to Figure
B.1 . 21
B.3.2 Service capacity for different mass flows according to Figure B.2 for
plain tubes and according to Figure B.3 for finned tubes . 21
B.3.3 Service capacity for different mass flows and different temperatures . 22
B.3.4 Example for calculation of 25 % capacity margin of new heat
exchangers . 22
Annex C (informative) Example for calculation of capacity in service . 26
Bibliography . 28

Figure A.1 – Collection and forms of suspensory types . 16
Figure A.2 – Collection and forms of horizontal types . 17
Figure A.3 – Collection and forms of vertical standing types . 18
Figure B.1 – Capacity factor depending on inlet temperatures of oil and water . 23
Figure B.2 – Capacity factor depending on mass for plain tubes . 24
Figure B.3 – Capacity factor depending on mass for finned tubes . 25

Table 1 – Water quality data . 12
Table 2 – Mandatory fittings . 13
Table A.1 – Examples of material selection depending on water quality . 20
Table A.2 – Average values for chemically neutral water (fresh water) . 20

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