IEC 60505:2011

Evaluation and qualification of electrical insulation systems

IEC 60505:2011 establishes the basis for estimating the ageing of electrical insulation systems (EIS) under conditions of either electrical, thermal, mechanical, environmental stresses or combinations of these (multifactor stresses). It specifies the principles and procedures that shall be followed, during the development of EIS functional test and evaluation procedures, to establish the estimated service life for a specific EIS. This standard should be used by all IEC technical committees responsible for equipment having an EIS. The contents of the corrigendum of March 2017 have been included in this copy.

Evaluation et qualification des systèmes d'isolation électrique

La CEI 60505:2011 établit les bases de l'estimation du vieillissement des systèmes d'isolation électrique (SIE) dans des conditions de contraintes électriques, thermiques, mécaniques, environnementales ou de combinaisons de ces contraintes (contraintes multifactorielles). Elle spécifie les principes et les procédures qui doivent être suivis, au cours du développement d'essais fonctionnels ou de procédures d'évaluation des SIE, pour établir la durée de vie estimée d'un SIE spécifique. Il convient que tous les comités d'études de la CEI responsables de matériels ayant un SIE utilisent la présente norme. Le contenu du corrigendum de mars 2017 a été pris en considération dans cet exemplaire.

Loading guide for dry-type power transformers

General Information

• Status: Published
• Publication Date: 10-Jul-2011
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 29.080.30 - Insulation systems
• ICS: 29.180 - Transformers. Reactors
• Technical Committee: TC 112 - Evaluation and qualification of electrical insulating materials and systems
• Drafting Committee: WG 6 - TC 112/WG 6
• Current Stage: PPUB - Publication issued
• Start Date: 15-Jul-2011
• Completion Date: 11-Jul-2011
• Ref Project: SIST IEC 60905:1997 - Loading guide for dry-type power transformers

Standards Content (Sample)

SLOVENSKI STANDARD
SIST IEC 60905:1997
01-oktober-1997
Loading guide for dry-type power transformers
Loading guide for dry-type power transformers
Guide de charge pour transformateurs de puissance du type sec
Ta slovenski standard je istoveten z: IEC 60505 Ed. 4.0
ICS:
29.180 Transformatorji. Dušilke Transformers. Reactors
SIST IEC 60905:1997 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST IEC 60905:1997

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SIST IEC 60905:1997
NORME
CEI
INTERNATIONALE IEC
905
INTERNATIONAL
Première
édition
STANDARD
First edition
1987
Le contenu du corrigendum d'avril 1991 a
été incorporé dans cette réimpression
The contents of the corrigendum of April 1991 has been included in this reprint
Guide de charge pour transformateurs
de puissance du type sec
Loading guide for dry-type power transformers
© CEI 1995 Droits de reproduction réservés — Copyright — all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in
utilisée sous quelque forme que ce soit et par aucun pro- any form or by any means, electronic or mechanical,
cédé, électronique ou mécanique, y compris la photocopie et including photocopying and microfilm, without permission
les microfilms, sans l'accord écrit de l'éditeur. in writing from the publisher.
Bureau Central de la Commission Electrotechnique Internationale 3, rue de Varembé
Genève, Suisse
Commission Electrotechnique Internationale CODE PRIX
International Electrotechnical Commission PRICE CODE
S
IEC Mer+tgyuapoaHaa 3nelsrporexHH4ecnaa
HoMUCCUR
• Pour prix, voir
• catalogue en vigueur
For price, see current catalogue

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SIST IEC 60905:1997
— 3
905 © I E C 1987
CONTENTS
Page
FOREWORD 5
PREFACE 5
Clause
1. Scope 7
2. Object 7
3. Symbols 9
PART 1
11
4. Basis of guide
26
5. Algorithm for basic `use of life' calculations
6. Limitations 29
PART 2
29
7. Basis of establishing load curves
29
8. Selection of appropriate load curve with examples

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SIST IEC 60905:1997
905 ©IEC 1987 — 5 —
INTERNATIONAL ELECTROTECHNICAL COMMISSION
LOADING GUIDE
FOR DRY-TYPE POWER TRANSFORMERS
FOREWORD
1) The formal decisions or agreements of the I EC on technical matters, prepared by Technical Committees on which all the
National Committees having a special interest therein are represented, express, as nearly as possible, an international
consensus of opinion on the subjects dealt with.
2) They have the form of recommendations for international use and they are accepted by the National Committees in that
sense.
3) In order to promote international unification, the I E C expresses the wish that all National Committees should adopt the
text of the I E C recommendation for their national rules in so far as national conditions will permit. Any divergence
between the I E C recommendations and the corresponding national rules should, as far as possible, be clearly indicated in
the latter.
PREFACE
This guide has been prepared by IEC Technical Committee No. 14: Power transformers.
The text of this guide is based on the following documents:
Six Months' Rule Report on Voting
14(CO)60 14(CO)63
Full information on the voting for the approval of this guide can be found in the Voting Report
indicated in the above table.
The following 1 EC Publications are quoted in this guide:
Publications Nos. 76-1 (1976): Power transformers, Part 1: General.
726 (1982): Dry-type power transformers.

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SIST IEC 60905:1997
905 © I E C 1987 7
LOADING GUIDE
FOR DRY-TYPE POWER TRANSFORMERS
1. Scope
This guide is applicable to naturally cooled dry-type power transformers complying with
IEC Publication 726 and operated within the limitations referred to in Clause 6. Six different
insulation systems are taken into account, identified by their system temperatures.
Because there are numerous combinations of different insulation systems and constructions
it is possible to make loading recommendations only of a general nature. For this reason the
guide is in two parts:
— the first part makes no loading recommendations, but gives the method of calculating
loading conditions when the variable parameters are known as the result of prototype
testing of a particular construction and/or insulation system. The calculations are given in
the form of an algorithm from which computer programs can be written;
— the second part assumes constant values for the variable parameters, with the exception of
the insulation temperature limits (Table I) and the temperature of external cooling air,
irrespective of insulation system or construction, thereby enabling load curves to be
produced.
The guide indicates how dry-type transformers m
...

IEC 60505
®

Edition 4.0 2011-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Evaluation and qualification of electrical insulation systems

Évaluation et qualification des systèmes d'isolation électrique
IEC 60505:2011

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THIS PUBLICATION IS COPYRIGHT PROTECTED
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IEC 60505
®

Edition 4.0 2011-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside


Evaluation and qualification of electrical insulation systems

Évaluat
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