IEC 60255-11

SLOVENSKI STANDARD
SIST IEC 60255-11:1995
01-avgust-1995
Electrical relays - Part 11: Interruptions to and alternating component (ripple) in
d.c. auxiliary energizing quantity of measuring relays
Electrical relays - Part 11: Interruptions to and alternating component (ripple) in d.c.
auxiliary energizing quantity of measuring relays
Relais électriques - Onzième partie: Interruptions et composante alternative des
grandeurs d'alimentation auxiliaires à courant continu pour relais de mesure
Ta slovenski standard je istoveten z: IEC 60255-11
ICS:
29.120.70 Releji Relays
SIST IEC 60255-11:1995 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST IEC 60255-11:1995

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SIST IEC 60255-11:1995
CEI
NORME
INTERNATIONALE IEC
255-11
INTERNATIONAL
Première édition
STAN DARD
First edition
1979-01
Relais électriques
Onzième partie:
Interruptions et composante alternative
des grandeurs d'alimentation auxiliaires
à courant continu pour relais de mesure
Electrical relays
Part 11:
Interruptions to and alternating component (ripple)
in d.c. auxiliary energizing quantity of
measuring relays
réservés — Copyright - all rights reserved
© IEC 1979 Droits de reproduction
de ne peut être reproduite ni No part of this publication may be reproduced or utilized in
Aucune partie cette publication
que ce soit et par aucun any form or by any means, electronic or mechanical,
utilisée sous quelque forme
compris la photo- including photocopying and microfilm, without permission in
procédé, électronique ou mécanique, y
l'éditeur copie et les microfilms, sans l'accord écrit de writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
H
PRICE CODE
International Electrotechnical Commission
MerHayHapoaHae 3nenrpoTexHtwiecnasa KoMHccNa
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vigueur
Pour prix, voir catalogue en
• • For price, see current catalogue

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SIST IEC 60255-11:1995
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CONTENTS
Page
FOREWORD 5
5
PREFACE
SECTION ONE — GENERAL
Clause
7
1. Scope
REQUIREMENTS CONCERNING INTERRUPTIONS
SECTION Two —
TO D.C. AUXILIARY ENERGIZING QUANTITY
7
2. Interruption
7
Standard reference conditions and test tolerances of influencing quantities and factors 3.
Standard values of the limits of the nominal range of influencing quantities and factors. 9
4.
Effects of interruptions to d.c. auxiliary energizing quantity 9
5.
SECTION THREE — REQUIREMENTS CONCERNING ALTERNATING COMPONENT RIPPLE)
IN THE D.C. AUXILIARY ENERGIZING QUANTITY UNDER STEADY-STATE CONDITIONS
Definition of alternating component 9
6.
Conditions for determination of effects due to ripple 11
7.
11
Standard values of the limits of the nominal range
8.
13
APPENDIX A — Explanatory notes on auxiliary power supplies for static measuring relays.

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SIST IEC 60255-11:1995
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INTERNATIONAL ELECTROTECHNICAL COMMISSION
ELECTRICAL RELAYS
Part 11: Interruptions to and alternating component (ripple)
in d.c. auxiliary energizing quantity of measuring relays
FOREWORD
1) The formal decisions or agreements of the IE C 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.
They have the form of recommendations for international use and they are accepted by the National Committees in that
2)
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 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 Sub-Committee 41B: Measuring Relays, of I E C Technical
Committee No. 41: Electrical Relays.
Drafts were discussed at the meeting held in Milan in 1977. A draft, Document 41B(Central
Office)11, was submitted to the National Committees for approval under the Six Months' Rule in
May 1978.
The following countries voted explicitly in favour of publication:
Norway
Australia
Austria Poland
Belgium South Africa (Republic of)
Canada Spain
Egypt Sweden
Switzerland
France
Germany Turkey
Italy United Kingdom
Japan United States of America
This standard is a second-level publication applicable to measuring relays as specified in the
scope.
Other IEC publications quoted in this standard:
Publications Nos. 50(131): International Electrotechnical Vocabulary (I.E.V.) Chapter 131: Electric and Magnetic Circuits.
255-3: Electrical Relays — Part 3: Single Input Energizing Quantity Measuring Relays with
Non-specified Time or with Independent Specified Time.
255-4: Part 4: Single Input Energizing Quantity Measuring Relays with Dependent Specified Time.

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SIST IEC 60255-11:1995
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ELECTRICAL RELAYS
Part 11: Interruptions to and alternating component (ripple)
in d.c. auxiliary energizing quantity of measuring relays
SECTION ONE — GENERAL
1. Scope
This standard specifies the additional requirements to be met, and the additional parameters
whose values are to be declared by the manufacturer, in respect of interruptions to, and
alternating components (ripple) in the d.c. auxiliary energizing quantities of static measuring
relays.
The requirements of this standard may also apply to certain electromagnetic relays having a
d.c. auxiliary energizing quantity.
SECTION TWO — REQUIREMENTS CONCERNING INTERRUPTIONS
TO D.C. AUXILIARY ENERGIZING QUANTITY
This section deals with interruptions to the d.c. auxiliary energizing quantity which are
considered as an influencing quantity having a standard reference value but no nominal
range.
2. Interruption
An interruption is defined as either a break in, or a short circuit in, the auxiliary energizing
quantity supply*. Only single interruptions are considered. Separate tests may be needed to
establish the effects of a break in the supply and a short circuit in the supply. Test conditions
shall be specified.
Standard reference conditions and test tolerances of influencing quantities and factors
3.
TABLE I
Reference condition Test tolerances
Influencing quantity or factor
c 6
.w.Ç
Interruption 0 ms No test tolerance
V
n
Q Ç U
5
* It may be necessary to add additional series impedance into the supply circuit to enable the short-circuit condition
to be removed; the effect, if any, on the relay performance due to the addition of this impedance should be
declared by the manufacturer.

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SIST IEC 60255-11:1995
-9-
4. Standard values of the limits of the nominal range of influencing quantities and factors
TABLE II
Nominal range
Influencing quantity or factor
tq
i C .6
Not specified
cr, c Interruption
.>.5. t,
Q c
m
5. Effects of interruptions to d.c. auxiliary energizing quantity
The effects shall be determined for an interruption having a duration selected from the
following values and declared by the manufacturer: 2 — 5 — 10 — 20 — 50 — 100 —
200 ms.
The interruption shall be sudden, i.e. the auxiliary energizing quantity shall be changed from
rated value to 0 or vice versa. The manufacturer shall declare the test conditions.
In special cases, additional data may be required to show the effects of the rate of change of auxiliary
Note. —
voltage, e.g. the effects on d.c/d.c. converters.
The manufacturer shall declare the effects (if any) of the interruptions on:
– the accuracy;
the operating time;
–
– the resetting performance;
any other characteristics, if significant.
–
The relay shall not change its output state in a faulty manner when the auxiliary energizing
quantity is switched on or off.
Note. — See Appendix A.
REQUIREMENTS CONCERNIN
...