IEC 60076-22-6:2021

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

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.

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.

General Information

• Status: Published
• Publication Date: 17-Jan-2021
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: TC 14 - Power transformers
• Drafting Committee: WG 32 - TC 14/WG 32
• Current Stage: PPUB - Publication issued
• Start Date: 25-Jan-2021
• Completion Date: 18-Jan-2021

Standards Content (Sample)

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

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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

– 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

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER TRANSFORMERS –
Part 22-6: Power transformer and reactor fittings –
Electric fans for transformers

FOREWORD
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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
...