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SLOVENSKI STANDARD
01-avgust-1995
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Direct acting indicating analogue electrical measuring instruments and their accessories -
- Part 4: Special requirements for frequency meters
Direkt wirkende anzeigende elektrische Meßgeräte und ihr Zubehör; Meßgeräte mit
Skalenanzeige -- Teil 4: Spezielle Anforderungen für Frequenz-Meßgeräte
Appareils mesureurs électriques indicateurs analogiques à action directe et leurs
accessoires -- Partie 4: Prescriptions particulières pour les fréquencemètres
Ta slovenski standard je istoveten z: EN 60051-4:1989
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.
NORME CEI
INTERNATIONALE IEC
51-4
INTERNATIONAL
Quatrième édition
STAN DARD
Fourth edition
Appareils mesureurs électriques indicateurs
analogiques à action directe et
leurs accessoires
Quatrième partie:
Prescriptions particulières pour les fréquencemètres
Direct acting indicating analogue electrical
measuring instruments and their accessories
Part 4:
Special requirements for frequency meters
© CEI 1984 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
utilisée sous quelque forme que ce soit et par aucun procédé, in any form or by any means, electronic or mechanical,
électronique ou mécanique, y compris la photocopie et les including photocopying and microfilm, without permission
microfilms, sans l'accord écrit de l'éditeur. in writing from the publisher
Bureau central de la Commission Electrotechnique Internationale 3, we de Varembé Suisse
Genève
Commission Electrotechnique Internationale CODE PRIX
J
International Electrotechnical Commission PRICE CODE
IEC
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Pour prix, voir catalogue en vigueur
•
For price, see current catalogue
51-4 © IEC 1984 — 3 —
CONTENTS
Page
FOREWORD
PREFACE
Clause
1. Scope 7
2. Definitions
3. Description, classification and compliance 7
4. Reference conditions and intrinsic errors 7
5. Nominal range of use and va riations 9
Further electrical and mechanical requirements 6.
7. Constructional requirements
8. Information, general markings and symbols
9. Markings and symbols for terminals
10. Tests to prove compliance with this standard
51-4 IEC 1984 — 5 —
INTERNATIONAL ELECTROTECHNICAL COMMISSION
DIRECT ACTING INDICATING ANALOGUE ELECTRICAL MEASURING
INSTRUMENTS AND THEIR ACCESSORIES
Part 4: Special requirements for frequency meters
FOREWORD
I) The formal decisions or agreements of the IEC 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 inte rnational consensus of opinion
on the subjects dealt with.
ational use and they are accepted by the National Committees in that
2) They have the form of recommendations for inte rn
sense.
3) In order to promote inte rnational unification, the IEC expresses the wish that all National Committees should adopt the text of
the IEC recommendation for their national rules in so far as national conditions will permit. Any divergence between the I E C
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 Part 4.
The general layout for the revised Publication 51 is as follows:
rts.
Pa 1: Definitions and General Requirements Common to all Pa
rt
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.
Part 6: Special Requirements for Ohmmeters (Impedance Meters) and Conductance Meters.
Part 7: Special Requirements for Multi-function Instruments.
Part 8: Special Requirements for Accessories.
Part 9: Recommended Test Methods.
s 2 to 9 are not complete in themselves and shall be read in conjunction with Pa rt 1.
Part
All of these parts are arranged in the same format and a standard relationship between subject and clause number is maintained
rt number in order to differentiate the pa rts. This
throughout. In addition, tables, figures and appendices add a suffix to the pa
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)87 13B(CO)96
Further information can be found in the Repo rt on Voting indicated in the table above.
51-4 © IEC 1984 — 7 —
DIRECT ACTING INDICATING ANALOGUE ELECTRICAL MEASURING
INSTRUMENTS AND THEIR ACCESSORIES
Part 4: Special requirements for frequency meters
1. Scope
1.1 Part
4 of the standard applies to direct acting indicating analogue frequency meters.
1.2 This part
also applies to non-interchangeable accessories (as defined in Sub-clause 2.1.15.3 of Part 1)
used with frequency meters.
1.3 This sub-clause of Part 1 does not apply to frequency meters.
1.4 to 1.8 See Part 1.
2. Definitions
See Part 1.
3. Description, classification and compliance
3.1 Description
Frequency meters shall be described as:
3.1.1 Pointer-type frequency meters, or
3.1.2 Vibrating-reed frequency meters.
3.2 Classification
Frequency meters shall be classified in one of the accuracy classes denoted by the following class
indices:
0.05, 0.1, 0.15, 0.2, 0.3, 0.5, 1, 1.5, 2, 2.5, 5.
3.3 Compliance with the requirements of this standard
1.
See Part
4. Reference conditions and intrinsic errors
4.1 Reference conditions
See Part 1 and Table I-4.
51-4 © IEC 1984 — 9 —
TABLE I-4
Reference condition and tolerance, additional to those
given in Table I-1, for testing purposes
Tolerance permitted
Influence Reference condition
quantity unless otherwise marked for testing purposes')
Voltage of a.c. measured quantity Rated voltage or any voltage ±2% of the rated value
within the reference range
(if any)
') For a reference ra
...