IEC 61837-2:2011
(Main)Surface mounted piezoelectric devices for frequency control and selection - Standard outlines and terminal lead connections - Part 2: Ceramic enclosures
Surface mounted piezoelectric devices for frequency control and selection - Standard outlines and terminal lead connections - Part 2: Ceramic enclosures
IEC 61837-2:2011 deals with standard outlines and terminal lead connections as they apply to surface-mounted devices (SMD) for frequency control and selection in ceramic enclosures, and is based on IEC 61240. In this edition, types of enclosures are renamed to express their features in their names for better understanding. The relative comparison of new types with old ones is listed in Table 1. New names of enclosures express configuration type, terminal lead numbers, sizes and arrangement of terminal pads. The details of definition are shown in Clause 3: Configuration of enclosures, and Clause 4: Designation of types. Enclosures in this new edition are based on IEC 61240. In this standard, 27 enclosures are added to the first edition of IEC 61837-2.
This publication is to be read in conjunction with IEC 61240:1994.
Dispositifs piézoélectriques à montage en surface pour la commande et le choix de la fréquence - Encombrements normalisés et connexions des sorties - Partie 2: Enveloppes en céramique
La CEI 61837-2:2011 traite des encombrements normalisés et des connexions des sorties des dispositifs à montage en surface pour la commande et le choix de la fréquence applicables aux enveloppes en céramique, et est basée sur la CEI 61240. Dans la présente édition, les types des enveloppes sont renommés de manière à exprimer leurs caractéristiques dans leurs désignations appropriées pour une meilleure compréhension. La comparaison relative entre les nouveaux et les anciens types d'enveloppes est énumérée dans le Tableau 1. Les nouvelles désignations des enveloppes expriment le type de configuration, le nombre de sorties, les dimensions et la disposition des borniers (sorties). Les détails de définition sont présentés à l'Article 3: Configuration des enveloppes et à l'Article 4: Désignation des types. Les enveloppes présentées dans la nouvelle édition sont basées sur la CEI 61240. Dans cette norme, 27 enveloppes complètent la première édition de la CEI 61837-2.
Cette publication doit être lue conjointement avec la CEI 61240:1994.
Telecontrol equipment and systems - Part 1: General considerations - Section 2: Guide for specifications
General Information
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Buy Standard
Standards Content (Sample)
SLOVENSKI STANDARD
01-avgust-1997
Telecontrol equipment and systems - Part 1: General considerations - Section 2:
Guide for specifications
Telecontrol equipment and systems - Part 1: General considerations - Section 2: Guide
for specifications
Matériels et systèmes de téléconduite. Première partie: Considérations générales.
Section deux: Guide pour les spécifications
Ta slovenski standard je istoveten z: IEC 60870-1-2
ICS:
33.200 Daljinsko krmiljenje, daljinske Telecontrol. Telemetering
meritve (telemetrija)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
NORME CEI
INTERNATIONALE IEC
60870-1-2
INTERNATIONAL
Première
édition
STAN
DARD
First edition
1989-11
Matériels et systèmes de téléconduite
Première partie:
Considérations générales
Section deux — Guide pour les spécifications
Telecontrol equipment and systems
Part 1:
General considerations
Section 2 — Guide for specifications
© IEC 1989
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 in
quelque
utilisée sous forme que ce soit et par aucun any form or by any means, electronic or mechanical,
procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in
copie et les microfilms, sans l'accord écrit de l'éditeur. 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
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R
PRICE CODE
International Electrotechnical Commission
IEC
McNviyHapoAHaR 3neKTpoTexHH4ecKaR
HoMHCCHf
Pour prix, voir catalogue en vigueur
• • For price, see current catalogue
870-1-2 © IEC - 3 -
CONTENTS
Page
FOREWORD
PREFACE 5
INTRODUCTION
Clause
1. Scope 9
2 Object 9
3. Description of the telecontrol system and its functions
3.1 Description of the telecontrolled (or relemonitored)
process
3.2 Functions of telecontrol systems 11
3.3 Data quantities
3.4 Man-machine interface
3.5 Characteristics of the data flow 23
Specification of the data transmission network 23
4.
4.1 Data network configuration 23
4.2 Specification of telecontrol data transmission 25
4.3 Representation of the planned data network in a block
diagram 27
5. Equipment specifications 27
5.1 Overview of the equipment of telecontrol systems 27
5.2 Specifications of the environmental conditions 29
5.3 Specifications of interfaces between the different equip-
ment of telecontrol systems 31
5.4 Specifications of the power supply equipment 33
5.5 Mechanical specifications 33
5.6 Specifications of transport conditions 35
5.7 System tests and commissioning procedures 35
5.8 Operational conditions, guarantees 35
5.9 Documentation (under consideration) 35
Figure
1 Block diagram of the data flow (example) 37
©
870-1-2 IEC - 5 -
INTERNATIONAL ELECTROTECHNICAL COMMISSION
TELECONTROL EQUIPMENT AND SYSTEMS
Part 1: General considerations
Section Two - Guide for specifications
FOREWORD
1) 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 international consensus of opinion on the subjects
dealt with.
2) They have the form of recommendations for international use and they
are accepted by the National Committees in that sense.
3) Jn order to promote international 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 con-
ditions 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 report has been prepared by IEC Technical Committee No. 57:
Telecontrol, teleprotection and associated telecommunications for electric
power systems.
The text of this report is based upon the following documents:
Six Months' Rule Report on Voting
57(C0)44
57(C0)51
Full information on the voting for the approval of this report can be
found in the Voting Report indicated in the above table.
The following IEC publications are quoted in this report:
Publications Nos. 495 (1974): Recommended values for characteristic
input and output quantities of single
sideband power line carrier systems.
870-1
-2 © IEC - 7 -
870-1-1 (1988): Telecontrol equipment and systems,
Part 1: General considerations -
Section One: General principles.
870-2-1 (1987): Part 2: Operating conditions -
Section
One: Environmental conditions
and power supplies.
870-3 (1989): Part 3: Interfaces (electrical charac-
teristics).
870-4 (19.): Part 4: Performance requirements.
870-5 (19.): Part 5: Transmission protocols.
870-6: Part 6: Telecontrol protocols compat-
ible with ISO standards and CCITT
recommendations.
870-1-2 © IEC - 9 -
TELECONTROL EQUIPMENT AND SYSTEMS
Part 1: General considerations
Section Two - Guide for specifications
INTRODUCTION
Planning of telecontrol systems and defining the specifications of a
system and of its equipment are complex and demand a large amount of
detailed information. There are not only application functions of the
system to be defined but also the operational parameters, the local
environmental conditions and the data transmission paths available as
well as their characteristics. The interfaces between the components of
the system and other equipment facilities such as power supply require-
ments shall also be specified.
Many aspects of this field are covered by standards within the
IEC 870 series on telecontrol equipment and s, stems but many deci-
sions are still left to the engineers who have to plan a system and
establish the specifications.
1. Scope
This series of standards applies to telecontrol equipment and systems
with coded bit serial data transmission for monitoring and control of
geographically widespread processes.
2. Object
This section presents guidelines but not standards for establishing
specifications for telecontrol systems and equipment following the other
IEC standards on telecontrol systems and other relevant international
standards and recommendations such as CCITT recommendations. It
also facilitates the comparison of equipment of different manufacturers.
The planning of telecontrol systems should be subdivided into clearly
defined steps:
- The first step involves a consideration of the operational require-
ments of telecontrol systems (clause 3 of this section) .
-
In the second step, the conditions and limitations of the data
transmission network are considered and the most suitable utili-
zation is specified (clause 4 of this section) .
870-1-2 © IEC - 11 -
Thirdly, the required facilities for the telecontrol equipment and
other equipment of telecontrol systems are specified. This includes
considerations of whether it is useful to include existing local
control equipment (clause 5 of this section) .
The guidelines given in this section are applicable also if only parts
of telecontrol systems are needed. In this case only the relevant
clauses need be considered.
3.
Description of the telecontrol system and its functions
Design aim of the system, for example:
"Main (or regional) control system." (name of the power company
or of the region), or
"District telecontrol system." (name of the district itself or of
the district control centre), or
"Telecontrol system for power station." (name of the controlled
station) .
3.1 Description of the telecontrolled (or telemonitored) process
3.1.1 Purpose of process to be controlled
(Short explanation only as far as necessary for planning telecontrol
systems.)
3.1.2 Name of master stations and control centres
Description of the function, e. g. dispatching centre, regional control
centre, etc.
3.1.3 Number and names of outstations
Description of their functions, e.g. "Power station.", "Transformer
station.", etc.
3.1.4 Geographical configuration of the system
System block diagram and site description.
Location and distances between interconnected stations
3.1.5
Functions of telecontrol systems
3.2
3.2.1 Survey of application functions
3.2.1.1 Basic functions
flow, generated power, sum-
- Telemetering of the transfer power
mation of the power consumption, line voltage, frequency, tempera-
ture, water-levels, etc.;
telecounting of the generated energy, energy consumption, energy
-
transfer, etc.;
870-1-2 © IEC - 13 -
- teleindication of the circuit-breaker, protection functions, alarms,
etc;
- telecommand of the circuit-breaker, etc.;
- time synchronization between outstations and master station;
- time tagging of information.
3.2.1.2 Extended processing functions
Teleregulation of the generated power (manually or automatically
-
controlled);
automatic power/frequency regulation;
- state estimation;
- automatic load shedding;
- switching programmes;
operator interface (such as system operation, information display);
- information logging and reporting;
data storage (short term/long term) ;
- etc.
3.2.2 Requirements for operational parameters
The following operational parameters are specified within Publi-
cation 870-4:
- reliability;
- availability;
maintainability;
- security;
- data integrity;
- time parameters;
- accuracy.
In specifying the time parameters, particular consideration should be
given to the:
- overall transfer time (sum of the times taken by the information
passing through the individual sections of telecontrol systems, but
also influenced by the network configuration, priority, accumu-
lation of events, etc.);
- parameters for state information, such as separating capability,
time resolution, suppression time, etc.;
- updating time for measured values and set point commands;
etc.
It should be emphasized that in specifying the above-mentioned
parameters the requirements of the process should be considered.
870-1-2 © IEC - 15 -
3.2.3 Detailed specification
The facilities required should be listed and briefly described.
Below is a list of the standard facilities found in telecontrol systems.
Input and acquisition of monitored information
3.2.3.1
- Single point information;
for alarms, state information, faulty state information, etc.
(fleeting information or persistent information);
double point information with or without acquisition of the inter-
-
mediate state
for circuit-breakers, isolators, etc.;
integrated values
for telecounting of energy values, etc.;
incremental information
for flow values, etc.;
measured values (analog or digital) with cyclic or periodic trans-
mission or transmission on demand
for telemetering of electric values, hydraulic values, etc.;
time tagging requirements;
group alarms or common alarms derived from digital or analog
-
information;
information related to the telecontrol system itself, e.g. trans-
-
mission error alarms, equipment failure alarms, etc.;
other types of information.
-
Output and presentation of information
3.2.3.2
State information;
-
double point information with or without indicating the intermediate
state;
alarms, group alarms, common alarms;
-
pulse output or persistent indication of integrated values;
-
analog or digital display or measured values;
-
- information logging;
data storage functions.
-
3.2.3.3 Command input
Switching commands, single commands
-
to change the state of an operational equipment in one direction
(pulse commands or persistent commands);
- switching commands, double commands
for circuit-breakers, isolators, etc.
(pulse commands or maintained commands);
- 17 -
870-1-2 © IEC
- set point commands
values which are transmitted to the controlled equipment;
adjusting commands
for changing the state of operational equipment having more than
two states;
regulating commands (analog or digital)
for closed loop telemonitoring and telecommand
(regulating step commands or persistent regulating commands);
select and execute commands;
- instruction commands
for indicating a standard instruction to operators in the control
room of a manually operated remote station,
e.g. "Start generators";
- command sequences;
- group commands
addressed to several items of equipment at an outstation;
- broadcast commands
addressed to operational equipment at several or all outstations of
a telecontrol system;
- commands related to the telecontrol system itself;
- interrogation commands;
- check commands
e.g. for the purpose of ensuring that the telecontrol equipment is
functioning correctly;
- other types of information.
3.2.3.4 Command output
- Single commands;
- double commands with or without supervision of faulty states;
set point commands with or without validity indication and with or
without storage;
- adjusting commands;
-
command sequences;
-
indication of the instruction commands.
3.3 Data quantities
The data quantities can be expressed by the number of input and
output points. The number of points can be given in lists or tables,
drawn up to reflect functions required as well as the different
locations of telecontrol systems, for example:
870-1-2 © IE C - 19 -
Information input
— ^
Station
^.\ a Totals
Input
Single point
information
Double point
information
Other types of
information
Information output (per station)
Presen- r
Digital Analog ••• logging
tation Mimic
diagram display display
Output
State
information
Double point
information
(with inter-
mediate state)
•
Measured
values
Note - Initial and maximum capacities should be included where they
are not the same.
870-1-2 IEC - 21 -
Command input
Station
a n
b Totals
Input
Single
commands
(pulse)
Single
commands
(persistent)
•
•
Other t es of
yp
information
Command output (per station)
Output
mode Pulse Persistent Analog
output
...
IEC 61837-2 ®
Edition 2.0 2011-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Surface mounted piezoelectric devices for frequency control and selection –
Standard outlines and terminal lead connections –
Part 2: Ceramic enclosures
Dispositifs piézoélectriques à montage en surface pour la commande et le choix
de la fréquence – Encombrements normalisés et connexions des sorties –
Partie 2: Enveloppes en céramique
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IEC 61837-2 ®
Edition 2.0 2011-05
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Surface mounted piezoelectric devices for frequency control and selection –
Standard outlines and terminal lead connections –
Part 2: Ceramic enclosures
Dispositifs piézoélectriques à montage en surface pour la commande et le choix
de la fréquence – Encombrements normalisés et connexions des sorties –
Partie 2: Enveloppes en céramique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XC
ICS 31.140 ISBN 978-2-88912-494-7
– 2 – 61837-2 © IEC:2011
CONTENTS
FO R EW O RD . 3
1 Sc op e . 5
2 Normative references . 5
3 Configuration of enclosures . 5
4 Designation of types . 5
5 Ceramic enclosure dimensions . 6
6 Lead connections . 6
7 Designation of ceramic enclosures . 6
Bibliography . 84
Table 1 – Designation of ceramic enclosures . 6
61837-2 © IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
SURFACE MOUNTED PIEZOELECTRIC DEVICES
FOR FREQUENCY CONTROL AND SELECTION –
STANDARD OUTLINES AND TERMINAL LEAD CONNECTIONS –
Part 2: Ceramic enclosures
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in
addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
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other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses
arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
lnternational Standard IEC 61837-2 has been prepared by lEC technical committee 49:
Piezoelectric, dielectric and electrostatic devices and associated materials for frequency control,
selection and detection.
This second edition cancels and replaces the first edition published in 2000. It constitutes a
technical revision.
In this edition, types of enclosures are renamed to express their features in their names for
better understanding. The relative comparison of new types with old ones is listed in Table. 1.
New names of enclosures express configuration type, terminal lead numbers, sizes and
arrangement of terminal pads. The details of definition are shown in Clause 3: Configuration of
enclosures, and Clause 4: Designation of types.
Enclosures in this new edition are based on IEC 61240. In this standard, 27 enclosures are
added to the first edition of IEC 61837-2, as follows:
– 4 – 61837-2 © IEC:2011
QCC-12/1407A, DCC-2/1206A, QCC-10/9272A, DCC-4/9070A, DCC-2-8045B, DCC-6/7834B,
DCC-6/7050A, QCC-10/7050A, DCC-4/6035C, DCC-2/6035C, QCC-8/5045A, DCC-4/5032A,
DCC-4/5032C, DCC-2/4818C, DCC-2/4115C, QCC-8/3838A, DCC-6/3838A, DCC-4/3225C,
DCC-2/3215C, QCC-8/3030B, DCC-6/3030A, DCC-6/2520A, DCC-4/2520C, DCC-4/2020C,
DCC-4/2016C, DCC-4/1612C, DCC-2/1612C.
As a result, the new version (the second edition) contains a total of 38 enclosure types, which
are listed in Table 1 – Designation of ceramic enclosures.
This standard is to be read in conjunction with IEC 61240.
The text of this standard is based on the following documents:
CDV Report on Voting
49/884/CDV 49/908/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
A list of all parts of the IEC 61837 series, published under the general title: Surface mounted
piezoelectric devices for frequency control and selection – Standard outlines and terminal lead
connections, can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until the
stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to
the specific publication. At this date, the publication will be
‡ reconfirmed,
‡ withdrawn,
‡ replaced by a revised edition, or
‡ amended.
61837-2 © IEC:2011 – 5 –
SURFACE MOUNTED PIEZOELECTRIC DEVICES
FOR FREQUENCY CONTROL AND SELECTION –
STANDARD OUTLINES AND TERMINAL LEAD CONNECTIONS –
Part 2: Ceramic enclosures
1 Scope
This part of IEC 61837 deals with standard outlines and terminal lead connections as they apply
to surface-mounted devices (SMD) for frequency control and selection in ceramic enclosures,
and is based on IEC 61240.
2 Normative references
The following referenced documents are indispensable for the application of this document. For
dated references, only the edition cited applies. For undated references, the latest edition of the
referenced document (including any amendments) applies.
IEC 61240, Piezoelectric devices – Preparation of outline drawings of surface-mounted devices
(SMD) for frequency control and selection – General rules
3 Configuration of enclosures
The enclosures of the surface-mounted devices are made of ceramic materials with the
terminals of deposited metal film (leadless type) based on descriptive designation system for
semiconductors – devices package.
The configuration symbols are shown as follows:
– DCC (dual chip carrier);
– QCC (quad chip carrier).
4 Designation of types
The designation of types is shown on four parts as follows:
E
B C
A D D’
A: Configuration symbol of enclosures:
– DCC (dual chip carrier);
– QCC (quad chip carrier).
B: Structure of terminal leads: leadless type has no mark.
C: Number of terminal leads
– 6 – 61837-2 © IEC:2011
D: Seria
...
IEC 61837-2 ®
Edition 2.1 2014-03
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Surface mounted piezoelectric devices for frequency control and selection –
Standard outlines and terminal lead connections –
Part 2: Ceramic enclosures
Dispositifs piézoélectriques à montage en surface pour la commande et le choix
de la fréquence – Encombrements normalisés et connexions des sorties –
Partie 2: Enveloppes en céramique
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IEC 61837-2 ®
Edition 2.1 2014-03
CONSOLIDATED
VERSION
VERSION
CONSOLIDÉE
colour
inside
Surface mounted piezoelectric devices for frequency control and selection –
Standard outlines and terminal lead connections –
Part 2: Ceramic enclosures
Dispositifs piézoélectriques à montage en surface pour la commande et le choix
de la fréquence – Encombrements normalisés et connexions des sorties –
Partie 2: Enveloppes en céramique
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.140 ISBN 978-2-8322-1488-6
IEC 61837-2 ®
Edition 2.1 2014-03
REDLINE VERSION
VERSION REDLINE
colour
inside
Surface mounted piezoelectric devices for frequency control and selection –
Standard outlines and terminal lead connections –
Part 2: Ceramic enclosures
Dispositifs piézoélectriques à montage en surface pour la commande et le choix
de la fréquence – Encombrements normalisés et connexions des sorties –
Partie 2: Enveloppes en céramique
– 2 – IEC 61837-2:2011
+AMD1:2014 © IEC 2014
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Configuration of enclosures . 5
4 Designation of types . 5
5 Ceramic enclosure dimensions . 6
6 Lead connections . 6
7 Designation of ceramic enclosures . 6
Bibliography . 86
Table 1 – Designation of ceramic enclosures . 6
+AMD1:2014 © IEC 2014
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
SURFACE MOUNTED PIEZOELECTRIC DEVICES
FOR FREQUENCY CONTROL AND SELECTION –
STANDARD OUTLINES AND TERMINAL LEAD CONNECTIONS –
Part 2: Ceramic enclosures
FOREWORD
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This Consolidated version of IEC 61837-2 bears the edition number 2.1. It consists of the
second edition (2011-05) [documents 49/884/CDV and 49/908/RVC] and its amendment 1
(2014-03) [documents 49/1078/CDV and 49/1094/RVC]. The technical content is identical
to the base edition and its amendment.
In this Redline version, a vertical line in the margin shows where the technical content is
modified by amendments 1. Additions and deletions are displayed in red, with deletions
being struck through. A separate Final version with all changes accepted is available in
this publication.
This publication has been prepared for user convenience.
– 4 – IEC 61837-2:2011
+AMD1:2014 © IEC 2014
lnternational Standard IEC 61837-2 has been prepared by lEC technical committee 49:
Piezoelectric, dielectric and electrostatic devices and associated materials for frequency control,
selection and detection.
In this edition, types of enclosures are renamed to express their features in their names for
better understanding. The relative comparison of new types with old ones is listed in Table. 1.
New names of enclosures express configuration type, terminal lead numbers, sizes and
arrangement of terminal pads. The details of definition are shown in Clause 3: Configuration of
enclosures, and Clause 4: Designation of types.
Enclosures in this new edition are based on IEC 61240. In this standard, 27 enclosures are
added to the first edition of IEC 61837-2, as follows:
QCC-12/1407A, DCC-2/1206A, QCC-10/9272A, DCC-4/9070A, DCC-2-8045B, DCC-6/7834B,
DCC-6/7050A, QCC-10/7050A, DCC-4/6035C, DCC-2/6035C, QCC-8/5045A, DCC-4/5032A,
DCC-4/5032C, DCC-2/4818C, DCC-2/4115C, QCC-8/3838A, DCC-6/3838A, DCC-4/3225C,
DCC-2/3215C, QCC-8/3030B, DCC-6/3030A, DCC-6/2520A, DCC-4/2520C, DCC-4/2020C,
DCC-4/2016C, DCC-4/1612C, DCC-2/1612C.
As a result, the new version (the second edition) contains a total of 38 enclosure types, which
are listed in Table 1 – Designation of ceramic enclosures.
This standard is to be read in conjunction with IEC 61240.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
A list of all parts of the IEC 61837 series, published under the g
...
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