Table of Contents

FOREWORD<br>INTRODUCTION<br>1 Scope <br>2 Normative references <br>3 Terms and definitions <br>4 Service conditions<br>5 Selection principle<br>6 DC current-limiting device<br>7 DC current-blocking device <br>8 Tests<br>9 Packing, transportation and storage requirements<br>10 Nameplate specification<br>11 Technical documentation requirements <br>Annex A (informative) - Generation mechanism of DC<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;bias current of power transformers caused by<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;HVDC system <br>Annex B (informative) - Examples of harmful effects<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;of DC bias current<br>Annex C (informative) - DC current-limiting device<br>Annex D (informative) - DC current-blocking device<br>Annex E (informative) - Information needed to calculate<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;the DC bias current of transformers<br>Annex F (informative) - Methods of calculation of DC<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;bias current voltage sources<br>Annex G (informative) - Application examples

Abstract

Describes requirements for devices for the suppression of DC magnetic bias of power transformers and convertor transformers.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Electrotechnical Committee
Pages
ISBN
Committee	TC 14