SOUTH AFRICAN NATIONAL STANDARD

Transcription

1 ISBN IEC :2006 SOUTH AFRICAN NATIONAL STANDARD High-voltage test techniques Part 3: Definitions and requirements for on-site testing This national standard is the identical implementation of IEC :2006, and is adopted with the permission of the International Electrotechnical Commission. WARNING Can only be read in conjunction with SANS and SANS Published by SABS Standards Division 1 Dr Lategan Road Groenkloof Private Bag X191 Pretoria 0001 Tel: Fax: SABS

2 IEC :2006 Table of changes Change No. Date Scope National foreword This South African standard was prepared by National Committee SABS/TC 067/SC 04, Electricity distribution systems and components Insulators, in accordance with procedures of the SABS, in compliance with annex 3 of the WTO/TBT agreement. Compliance with this document cannot confer immunity from legal obligations. Reaffirmed and reprinted in April This document will be reviewed every five years and be reaffirmed, amended, revised or withdrawn. SABS

3 INTERNATIONAL STANDARD IEC First edition High-voltage test techniques Part 3: Definitions and requirements for on-site testing IEC 2006 Copyright - all rights reserved No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland Telephone: Telefax: inmail@iec.ch Web: Commission Electrotechnique Internationale International Electrotechnical Commission Международная Электротехническая Комиссия PRICE CODE For price, see current catalogue V

4 IEC:2006(E) CONTENTS FOREWORD...4 INTRODUCTION Scope Normative references Terms and definitions Common tests and checks on a measuring system Acceptance test Performance test Performance check Record of performance Tests with direct voltage General Definitions for direct voltage tests Test voltage Measurement of the test voltage Tests and checks on measuring systems Withstand voltage test procedure Tests with alternating voltage General Definitions for alternating voltage tests Test voltage Measurement of the test voltage Tests and checks on measuring systems Withstand voltage test procedure Tests with lightning impulse voltage General Definitions for lightning impulse voltage tests Test voltage Measurement of the test voltage and determination of the impulse voltage shape Tests and checks on measuring systems Withstand voltage test procedures Tests with switching impulse voltage General Definitions for switching impulse voltage tests Test voltage Measurement of the test voltage and determination of the impulse shape Tests and checks on measuring systems Withstand voltage test procedures Tests with very low frequency voltages General Definitions for very low frequency voltage tests Test voltage Measurement of the test voltage Tests and checks on measuring systems Test procedure...30

5 IEC:2006(E) 3 10 Tests with damped alternating voltages General Definitions for damped alternating voltage tests Test voltage Measurement of the test voltage Tests and checks on measuring systems Test procedure...33 Figure 1 Aperiodic lightning impulse...19 Figure 2 Oscillating lightning impulse...20 Figure 3 Aperiodic switching impulse...24 Figure 4 Oscillating switching impulse...25 Figure 5 Damped alternating voltage (f r = 1 khz, D f = 0,2)...31