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SLOVENSKI STANDARD
01-avgust-1995
1HSRVUHGQLND]DOQLDQDORJQLHOHNWULþQLPHULOQLLQVWUXPHQWLLQQMLKRYSULERU±GHO
3RVHEQH]DKWHYH]DSULERU ,(&
Direct acting indicating analogue electrical measuring instruments and their accessories -
- Part 8: Special requirements for accessories
Direkt wirkende anzeigende elektrische Meßgeräte und ihr Zubehör - Meßgeräte mit
Skalenanzeige -- Teil 8: Spezielle Anforderungen für Zubehör
Appareils mesureurs électriques indicateurs analogiques à action directe et leurs
accessoires -- Partie 8: Prescriptions particulières pour les accessoires
Ta slovenski standard je istoveten z: EN 60051-8:1989
ICS:
17.220.20 0HUMHQMHHOHNWULþQLKLQ Measurement of electrical
PDJQHWQLKYHOLþLQ and magnetic quantities
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
CEI
NORME
INTERNATIONALE
IEC
51-8
INTERNATIONAL
Quatrième édition
STAN DARD
Fourth edition
Appareils mesureurs électriques indicateurs
analogiques à action directe et leurs accessoires
Huitième partie:
Prescriptions particulières pour les accessoires
Direct acting indicating analogue electrical
measuring instruments and their accessories
Part 8:
Special requirements for accessories
Copyright - all rights reserved
© CEI 1984 Droits de reproduction réservés —
No part of this publication may be reproduced or utilized
Aucune partie de cette publication ne peut être reproduite ni
in any form or by any means, electronic or mechanical,
utilisée sous quelque forme que ce soit et par aucun procédé,
including photocopying and microfilm, without permission
électronique ou mécanique, y compris la photocopie et les
publisher
ofilms, sans l'accord écrit de l'éditeur. in writing from the
micr
Genève Suisse
Bureau central de la Commission Electrotechnique Internationale 3, rue de Varembé
Commission Electrotechnique Internationale CODE PRIX
International Electrotechnical Commission PRICE CODE
IEC MemayHapogHaa 3nenrporexHM4ecnan HoMHCCHft
• Pour prix, voir catalogue en vigueur
•
For price, see current catalogue
1984 — 3
51-8 © IEC
CONTENTS
Page
FOREWORD
PREFACE 5
Clause
1. Scope 7
2. Definitions 7
3. Description, classification and compliance
Reference conditions and intrinsic errors 11
4.
5. Nominal range of use and variations
6. Further electrical and mechanical requirements
7. Constructional requirements
Information, general markings and symbols 8.
9. Markings and symbols for terminals
10. Tests to prove compliance with this standard
51 -8 © IEC 1984
INTERNATIONAL ELECTROTECHNICAL COMMISSION
DIRECT ACTING INDICATING ANALOGUE ELECTRICAL MEASURING
INSTRUMENTS AND THEIR ACCESSORIES
Part 8: Special requirements for accessories
FOREWORD
1) The formal decisions or agreements of the I E Con 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.
They have the form of recommendations for international use and they are accepted by the National Committees in that
2)
sense.
In order to promote international unification, the I EC expresses the wish that all National Committees should adopt the text of
3)
the IEC recommendation for their national rules in so far as national conditions will permit. Any divergence between the IEC
recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter.
PREFACE
This standard has been prepared by I EC Technical Committee No. 85: Measuring Equipment for Basic Electrical Quantities
(former Sub-Committee 13B: Electrical Measuring Instruments).
This fourth edition replaces the third edition of I EC Publication 51.
This standard constitutes Pa
rt 8.
The general layout for the revised Publication 51 is as follows:
rt
Part 1: Definitions and General Requirements Common to all Pa s.
Part 2: Special Requirements for Ammeters and Voltmeters.
Part 3: Special Requirements for Wattmeters and Varmeters.
Part 4: Special Requirements for Frequency Meters.
Part 5: Special Requirements for Phase Meters, Power Factor Meters and Synchroscopes.
ance Meters.
Part 6: Special Requirements for Ohmmeters (Impedance Meters) and Conduct
Part 7: Special Requirements for Multi-function Instruments.
Part 8: Special Requirements for Accessories.
Part 9: Recommended Test Methods.
Parts 2 to 9 are not complete in themselves and shall be read in conjunction with Pa rt 1.
All of these parts are arranged in the same format and a standard relationship between subject and clause number is maintained
s. This
throughout. In addition, tables, figures and appendices add a suffix to the pa rt number in order to differentiate the pa rt
re-arrangement will assist the reader of I EC Publication 51 to distinguish information relating to the different types of instru-
ments.
The text of this standard is based upon the following documents:
Six Months' Rule Report on Voting
13B(CO)91 13B(CO)100
rt on Voting indicated in the table above.
Further information can be found in the Repo
— 7 —
51-8 © IEC 1984
DIRECT ACTING INDICATING ANALOGUE ELECTRICAL MEASURING
INSTRUMENTS AND THEIR ACCESSORIES
Part 8: Special requirements for accessories
1. Scope
rt 1 does not apply to accessories.
1.1 This sub-clause of Pa
rt 1.
8 of the standard applies to accessories as defined in Sub-clause 2.1.15 of Pa
1.2 Part
rt 1 does not apply to accessories.
1.3 This sub-clause of Pa
1.4 to 1.8 See Part 1.
Definitions
See Part 1.
Description, classification and compliance
3.
3.1 Description
Accessories shall be described:
3.1.1 According to their nature as:
3.1.1.1 Shunts as defined in Sub-clause 2.1.16 of Part 1.
rt 1.
3.1.1.2 Series resistors (impedances) as defined in Sub-clause 2.1.17 of Pa
3.1.1.3 Special-to-type accessories, for example reactor boxes for frequency meters.
3.1.2 According to their interchangeability as:
rt 1.
3.1.2.1 Interchangeable accessories as defined in Sub-clause 2.1.15.1 of Pa
rt 1.
3.1.2.2 Accessories of limited interchangeability as defined in Sub-clause 2.1.15.2 of Pa
rt 1.
3.1.2.3 Non-interchangeable accessories as defined in Sub-clause 2.1.15.3 of Pa
51-8 © IEC 1984 — 9 —
3.2 Classification
3.2.1 Interchangeable accessories and accessories of limited interchangeability shall be classified in one
of the accuracy classes denoted by the following class indices:
0.02, 0.05, 0.1, 1, 2*, 0.2, 0.3, 0.5, 5*, 10*.
Note. — The class indices marked with an asterisk (*) are only for use with high-voltage series resistors and impedances.
3.2.2 A non-interchangeable accessory has no accuracy class of its own: the accuracy class of the asso-
ciated instrument applies to the combination of the instrument and accessory.
3.3 Compliance with the requirements of this standard
See Part 1.
3.3.1 and 3.3.2 See Part 1.
Interchangeable accessories and accessories of limited interchangeability
3.3.3
3.3.3.1 The erro
...