SIST EN 60077-2:2018

Railway applications - Electric equipment for rolling stock - Part 2: Electrotechnical components - General rules

In addition to the rules given in IEC 60077-1, this part of IEC 60077 provides general rules for
all electrotechnical components installed in power circuits, auxiliary circuits, control and
indicating circuits, etc., on railway rolling stock.
The purpose of this document is to adapt the general rules given in IEC 60077-1 to all
electrotechnical components for rolling stock, in order to obtain uniformity of requirements
and tests for the corresponding range of components.
Electrotechnical components are mainly switchgear and controlgear, including also relays,
valves, resistors, fuses, etc., irrespective of the nature of their control.
The incorporation of electronic components or electronic subassemblies into electrotechnical
components is now common practice. Although this document is not applicable to electronic
equipment, the presence of electronic components does not give grounds to exclude such
electrotechnical components from the scope of this document.
Electronic subassemblies comply with the relevant standard.
Some of these rules, after agreement between the user and the manufacturer, are used for
electrotechnical components installed on vehicles other than railway rolling stock, such as
mine locomotives, trolleybuses, etc.
This document states:
a) the characteristics of the components;
b) the service conditions with which components have to comply;
c) the tests intended to confirm compliance of the components with these characteristics
under these service conditions, and the methods to be adopted for these tests;
d) the information to be marked on, or given with, the apparatus.
This document does not cover industrial electrotechnical components which comply with their
own product standard. In order to ensure satisfactory operation of these components for
rolling stock, this document is used to specify only the particular requirements for railway
application. In that case, a specific document would state the additional requirements with
which the industrial components are to comply, e.g.:
– to be adapted (for example for control voltage, environmental conditions, etc.); or
– to be installed and used so as not to have to endure specific railway conditions; or
– to be additionally tested to prove that these components can satisfactorily withstand
railway conditions.
In the event of there being a difference in requirements between this document and a railway
rolling stock relevant product standard, then the product standard requirements take
precedence.

Bahnanwendungen - Elektrische Betriebsmittel auf Bahnfahrzeugen - Teil 2: Elektrotechnische Bauteile - Allgemeine Regeln

Applications ferroviaires - Equipements électriques du matériel roulant - Partie 2: Composants électrotechniques - Règles générales

NEW!IEC 60077-2:2017 est disponible sous forme de IEC 60077-2:2017 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente.

L’IEC 60077-2:2017 donne les règles générales applicables à tous les composants électrotechniques installés dans les circuits de puissance, circuits auxiliaires, circuits de commande et de contrôle, etc., installés sur le matériel roulant ferroviaire. Le présent document a pour but d'adapter les règles générales données dans l’IEC 60077-1 aux composants électrotechniques du matériel roulant afin d'harmoniser les exigences et les essais à la gamme de composants correspondante. Cette nouvelle édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: pouvoir de coupure en court-circuit; courant assigné de courte durée admissible; plage de courants critiques; spécification des conditions climatiques. Cette norme doit être lue conjointement avec l'IEC 60077-1:2017.

Železniške naprave - Električna oprema za vozna sredstva - 2. del: Elektrotehnične komponente - Splošna pravila

Poleg pravil, ki so navedena v standardu IEC 60077-1, ta del standarda IEC 60077 določa splošna pravila za vse elektrotehnične komponente, ki so nameščene v električnih tokokrogih, pomožnih tokokrogih ter krmilnih in indikatorskih tokokrogih za vozna sredstva.
Namen tega dokumenta je prilagoditi splošna pravila, določena v standardu IEC 60077-1, vsem elektrotehničnim komponentam za vozna sredstva za oblikovanje enotnosti zahtev in preskusov za ustrezen obseg komponent.
Elektrotehnične komponente so predvsem stikalne in krmilne naprave, vključno z releji, ventili, upori, varovalkami itd., ne glede na naravo njihovega krmiljenja.
Vključitev elektronskih komponent ali elektronskih podsklopov v elektrotehnične komponente je zdaj običajna praksa. Čeprav se ta dokument ne uporablja za elektronsko opremo, prisotnost elektronskih komponent ni razlog za izključitev takih elektrotehničnih komponent s področja uporabe tega dokumenta.
Elektronski podsklopi so v skladu z ustreznim standardom.
Nekatera od teh pravil se po dogovoru med uporabnikom in proizvajalcem uporabljajo za elektrotehnične komponente, nameščene na vozilih, ki niso del železniških voznih sredstev, kot so rudniške lokomotive, trolejbusi itd.
Ta dokument določa:
a) značilnosti komponent;
b) pogoje obratovanja, v skladu s katerimi morajo biti komponente;
c) preskuse, katerih cilj je potrditi skladnost komponent s temi lastnostmi pri teh pogojih obratovanja in izpolnitev metod izvajanja teh preskusov;
d) podatke, ki jih je treba označiti na napravi ali jih priložiti napravi.
Ta dokument ne zajema industrijskih elektrotehničnih komponent, ki so v skladu z lastnim standardom za izdelek. Za zagotovitev zadovoljivega delovanje teh komponent za vozna sredstva se ta dokument uporablja samo za določanje posebnih zahtev za železniške naprave. V tem primeru poseben dokument določa dodatne zahteve, v skladu s katerimi morajo biti industrijske komponente, npr.:
– da so prilagojene (npr. krmilni napetosti, okoljskim pogojem itd.); ali
– da so nameščene in se uporabljajo tako, da niso izpostavljene posebnim železniškim razmeram; ali
– da se dodatno preveri, da lahko te komponente zadovoljivo prenesejo železniške razmere.
Če obstaja razlika med zahtevami tega dokumenta in ustreznim standardom za železniška vozna sredstva, imajo prednost zahteve standarda za izdelek.

General Information

• Status: Published
• Publication Date: 03-Sep-2018
• ICS: 29.280 - Electric traction equipment
• Technical Committee: ŽEN - Electrical applications for railways
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 13-Aug-2018
• Due Date: 18-Oct-2018
• Completion Date: 04-Sep-2018
• Ref Project: EN 60077-2:2017 - Railway applications - Electric equipment for rolling stock - Part 2: Electrotechnical components - General rules

Relations

• Revised: SIST EN 60077-2:2003 - Railway applications - Electric equipment for rolling stock -- Part 2: Electrotechnical components - General rules
• Effective Date: 26-Jan-2016
• Replaces: SIST EN 60077-2:2003 - Railway applications - Electric equipment for rolling stock -- Part 2: Electrotechnical components - General rules
• Effective Date: 28-Nov-2017

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 60077-2:2018
01-oktober-2018
1DGRPHãþD
SIST EN 60077-2:2003
äHOH]QLãNHQDSUDYH(OHNWULþQDRSUHPD]DYR]QDVUHGVWYDGHO(OHNWURWHKQLþQH
NRPSRQHQWH6SORãQDSUDYLOD
Railway applications - Electric equipment for rolling stock - Part 2: Electrotechnical
components - General rules
Bahnanwendungen - Elektrische Betriebsmittel auf Bahnfahrzeugen - Teil 2:
Elektrotechnische Bauteile - Allgemeine Regeln
Applications ferroviaires - Equipements électriques du matériel roulant - Partie 2:
Composants électrotechniques - Règles générales
Ta slovenski standard je istoveten z: EN 60077-2:2017
ICS:
29.280 (OHNWULþQDYOHþQDRSUHPD Electric traction equipment
SIST EN 60077-2:2018 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 60077-2:2018

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SIST EN 60077-2:2018


EUROPEAN STANDARD EN 60077-2

NORME EUROPÉENNE

EUROPÄISCHE NORM
November 2017
ICS 45.060.01 Supersedes EN 60077-2:2002
English Version
Railway applications - Electric equipment for rolling stock -
Part 2: Electrotechnical components - General rules
(IEC 60077-2:2017)
Applications ferroviaires - Equipements électriques du Bahnanwendungen - Elektrische Betriebsmittel auf
matériel roulant - Partie 2: Composants électrotechniques - Bahnfahrzeugen - Teil 2: Elektrotechnische Bauteile -
Règles générales Allgemeine Regeln
(IEC 60077-2:2017) (IEC 60077-2:2017)
This European Standard was approved by CENELEC on 2017-09-01. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden,
Switzerland, Turkey and the United Kingdom.


European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2017 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
 Ref. No. EN 60077-2:2017 E

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SIST EN 60077-2:2018
EN 60077-2:2017
European foreword
The text of document 9/2267/FDIS, future edition 2 of IEC 60077-2, prepared by IEC/TC 9 "Electrical
equipment and systems for railways" was submitted to the IEC-CENELEC parallel vote and approved
by CENELEC as EN 60077-2:2017.

The following dates are fixed:
(dop) 2018-06-01
• latest date by which the document has to be
implemented at national level by
publication of an identical national
standard or by endorsement
• latest date by which the national (dow) 2020-09-01
standards conflicting with the
document have to be withdrawn

This document supersedes EN 60077-2:2002.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.

Endorsement notice
The text of the International Standard IEC 60077-2:2017 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60077-3 NOTE Harmonized as EN 60077-3.
IEC 60077-4 NOTE Harmonized as EN 60077-4.
IEC 60077-5 NOTE Harmonized as EN 60077-5.
IEC 60947-1 NOTE Harmonized as EN 60947-1.
IEC 60947-4-1 NOTE Harmonized as EN 60947-4-1.
IEC 61140 NOTE Harmonized as EN 61140.
IEC 61373 NOTE Harmonized as EN 61373.
2

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SIST EN 60077-2:2018
EN 60077-2:2017
Annex ZA
(normative)

Normative references to international publications
with their corresponding European publications

The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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.

NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod), the relevant
EN/HD applies.

NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.

Publication Year Title EN/HD Year

IEC 60050-811 2017 International Electrotechnical Vocabulary - -
(IEV) - Chapter 811: Electric traction
IEC 60068-2-1 -  Environmental testing - Part 2-1: Tests - EN 60068-2-1 -
Test A: Cold
IEC 60068-2-2 -  Environmental testing - Part 2-2: Tests - EN 60068-2-2 -
Test B: Dry heat
IEC 60068-2-30 -  Environmental testing - Part 2-30: Tests - EN 60068-2-30 -
Test Db: Damp heat, cyclic (12 h + 12 h
cycle)
IEC 60068-2-52 -  Environmental testing - Part 2-52: Tests - EN 60068-2-52 -
Test Kb: Salt mist, cyclic (sodium chloride
solution)
IEC 60068-2-78 -  Environmental testing - Part 2-78: Tests - EN 60068-2-78 -
Test Cab: Damp heat, steady state
IEC 60077-1 2017 Railway applications - Electric equipment EN 60077-1 2017
for rolling stock - Part 1: General service
conditions and general rules
IEC 60417-DB -  Graphical symbols for use on equipment - -
IEC 60529 -  Degrees of protection provided by EN 60529 -
enclosures (IP Code)
IEC/TR 60943 -  Guidance concerning the permissible - -
temperature rise for parts of electrical
equipment, in particular for terminals

3

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SIST EN 60077-2:2018

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SIST EN 60077-2:2018



IEC 60077-2

®


Edition 2.0 2017-07




INTERNATIONAL



STANDARD




NORME



INTERNATIONALE











Railway applications – Electric equipment for rolling stock –

Part 2: Electrotechnical components – General rules




Applications ferroviaires – Equipements électriques du matériel roulant –

Partie 2: Composants électrotechniques – Règles générales
















INTERNATIONAL

ELECTROTECHNICAL

COMMISSION


COMMISSION

ELECTROTECHNIQUE


INTERNATIONALE




ICS 45.060.01 ISBN 978-2-8322-4424-1



Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale

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SIST EN 60077-2:2018
– 2 – IEC 60077-2:2017 © IEC 2017
CONTENTS
FOREWORD . 4
1 Scope . 6
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 7
3.1 Components . 7
3.2 Component parts . 9
3.3 Operational features . 11
3.4 Abbreviated terms . 14
4 Classification . 15
5 Characteristics . 15
5.1 List of characteristics . 15
5.2 Type of component . 15
5.3 Rated and limiting values for the main circuit . 16
5.3.1 General . 16
5.3.2 Rated voltages . 16
5.3.3 Rated currents . 16
5.3.4 Rated time constants (for DC switchgear) . 16
5.3.5 Rated power factor (for AC switchgear) . 17
5.4 Operational frequencies . 17
5.5 Component categories . 17
5.6 Electric control circuits . 17
5.7 Pneumatic control circuits . 18
5.8 Manual control . 18
5.9 Electric auxiliary circuits . 18
5.10 Pneumatic auxiliary circuits . 19
5.11 Peak arc voltages . 19
6 Product information . 19
6.1 Nature of the information . 19
6.1.1 General . 19
6.1.2 Component documentation . 19
6.1.3 Other information . 20
6.2 Marking . 20
6.3 Instructions for storage, installation, operation and maintenance . 20
7 Normal service conditions . 21
8 Constructional and performance requirements . 21
8.1 Constructional requirements . 21
8.1.1 General . 21
8.1.2 Terminals and connecting capacity . 21
8.1.3 Protective bonding terminal . 21
8.2 Performance requirements . 21
8.2.1 Operating conditions . 21
8.2.2 Temperature limits . 22
8.2.3 Operation following inactivity . 23
8.2.4 Electromagnetic compatibility (EMC) . 23
8.2.5 Acoustic noise emission . 23

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SIST EN 60077-2:2018
IEC 60077-2:2017 © IEC 2017 – 3 –
8.2.6 Clearances . 23
8.2.7 Creepage distances . 23
8.2.8 Switching overvoltages . 23
8.2.9 Operational performance capability . 23
8.2.10 Ability to withstand vibration and shock . 25
8.2.11 Ability to withstand short-time current . 25
9 Tests . 25
9.1 Kinds of tests . 25
9.2 Verification of constructional requirements . 26
9.3 Type tests . 26
9.3.1 Test sequences . 26
9.3.2 General test conditions . 26
9.3.3 Test sequence I: General performance characteristics . 27
9.3.4 Test sequence II: Rated service making and breaking capacities (if
appropriate) . 28
9.3.5 Test sequence III: Ability to withstand vibration and shock . 30
9.3.6 Test sequence IV: Critical currents range . 31
9.3.7 Test sequence V: Climatic conditions . 31
9.3.8 Test sequence VI: Other tests. 32
9.4 Routine tests. 32
9.4.1 General . 32
9.4.2 Functional test . 32
9.4.3 Measurement of resistance or impedance . 32
9.4.4 Air-tightness (for pneumatic components) . 32
9.4.5 Dielectric withstand . 32
9.4.6 Check on the setting and operation of protective equipment and relays
(calibration) . 32
Annex A (normative) Correspondence between auxiliary contacts and steady states of
switchgear . 33
Bibliography . 35

Figure A.1 – Relationship between auxiliary contacts and steady states of switchgear . 34

Table 1 – Rated time constants . 17
Table 2 – Temperature rise limits and temperature limits . 22
Table 3 – Operational performance capability for category A1 components . 24
Table 4 – Operational performance capability for category A2 components . 24
Table 5 – Operational performance capability for category A3 components . 25
Table 6 – Operational performance capability for category A4 components . 25
Table 7 – List of test sequences . 26
Table 8 – Tolerances on test values . 27
Table 9 – Test method and severity . 31

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SIST EN 60077-2:2018
– 4 – IEC 60077-2:2017 © IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________

RAILWAY APPLICATIONS –
ELECTRIC EQUIPMENT FOR ROLLING STOCK –

Part 2: Electrotechnical components – General rules

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
members of its technical committees and IEC National Committees for any personal injury, property damage or
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.
International Standard IEC 60077-2 has been prepared by IEC technical committee 9:
Electrical equipment and systems for railways.
This second edition cancels and replaces the first edition of IEC 60077-2, issued in 1999. It
constitutes a technical revision.
This edition includes the following main technical changes with regard to the previous edition:
a) Short circuit breaking capacity;
b) Rated short-time withstand current;
c) Critical currents range;
d) Climatic conditions are specified.
This standard is to be read in conjunction with IEC 60077-1.

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SIST EN 60077-2:2018
IEC 60077-2:2017 © IEC 2017 – 5 –
The text of this standard is based on the following documents:
FDIS Report on voting
9/2267/FDIS 9/2279/RVD

Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
A list of all parts in the IEC 60077 series, published under the general title Railway
applications – Electric equipment for rolling stock, can be found on the IEC website.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC website 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.

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SIST EN 60077-2:2018
– 6 – IEC 60077-2:2017 © IEC 2017
RAILWAY APPLICATIONS –
ELECTRIC EQUIPMENT FOR ROLLING STOCK –

Part 2: Electrotechnical components – General rules



1 Scope
In addition to the rules given in IEC 60077-1, this part of IEC 60077 provides general rules for
all electrotechnical components installed in power circuits, auxiliary circuits, control and
indicating circuits, etc., on railway rolling stock.
The purpose of this document is to adapt the general rules given in IEC 60077-1 to all
electrotechnical components for rolling stock, in order to obtain uniformity of requirements
and tests for the corresponding range of components.
Electrotechnical components are mainly switchgear and controlgear, including also relays,
valves, resistors, fuses, etc., irrespective of the nature of their control.
The incorporation of electronic components or electronic subassemblies into electrotechnical
components is now common practice. Although this document is not applicable to electronic
equipment, the presence of electronic components does not give grounds to exclude such
electrotechnical components from the scope of this document.
Electronic subassemblies comply with the relevant standard.
Some of these rules, after agreement between the user and the manufacturer, are used for
electrotechnical components installed on vehicles other than railway rolling stock, such as
mine locomotives, trolleybuses, etc.
This document states:
a) the characteristics of the components;
b) the service conditions with which components have to comply;
c) the tests intended to confirm compliance of the components with these characteristics
under these service conditions, and the methods to be adopted for these tests;
d) the information to be marked on, or given with, the apparatus.
This document does not cover industrial electrotechnical components which comply with their
own product standard. In order to ensure satisfactory operation of these components for
rolling stock, this document is used to specify only the particular requirements for railway
application. In that case, a specific document would state the additional requirements with
which the industrial components are to comply, e.g.:
– to be adapted (for example for control voltage, environmental conditions, etc.); or
– to be installed and used so as not to have to endure specific railway conditions; or
– to be additionally tested to prove that these components can satisfactorily withstand
railway conditions.
In the event of there being a difference in requirements between this document and a railway
rolling stock relevant product standard, then the product standard requirements take
precedence.

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SIST EN 60077-2:2018
IEC 60077-2:2017 © IEC 2017 – 7 –
2 Normative references
The following documents are referred to in the text in such a way that some or all of their
content constitutes requirements 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 60050-811:2017, International Electrotechnical Vocabulary (IEV) – Chapter 811: Electric
traction
IEC 60068-2-1, Environmental testing – Part 2-1: Tests – Test A: Cold
IEC 60068-2-2, Environmental testing – Part 2-2: Tests – Test B: Dry heat
IEC 60068-2-30, Environmental testing – Part 2-30: Tests – Test Db: Damp heat, cyclic (12 h
+ 12 h cycle)
IEC 60068-2-52, Environmental testing – Part 2-52: Test methods – Test Kb: Salt mist, cyclic
(sodium, chloride solution)
IEC 60068-2-78, Environmental testing – Part 2-78: Tests – Test Cab: Damp heat, steady
state
IEC 60077-1:2017, Railway applications – Electric equipment for rolling stock – Part 1:
General service conditions and general rules
IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-
symbols.info/equipment)
IEC 60529, Degrees of protection provided by enclosures (IP Code)
IEC TR 60943, Guidance concerning the permissible temperature rise for parts of electrical
equipment, in particular for terminals
3 Terms, definitions and abbreviated terms
For the purposes of this document, the terms and definitions given in IEC 60077-1 as well as
the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following
addresses:
• IEC Electropedia: available at http://www.electropedia.org/
• ISO Online browsing platform: available at http://www.iso.org/obp
3.1 Components
3.1.1
active electrical component
simple device or assembly of devices which, in response to a control signal, executes a
function or various inseparable functions of logical or analogical nature by changing their
state, for which the control or the function is electrical (e.g. contactor, relay, etc.)
Note 1 to entry: Passive electical component is defined as the antonym of this term.

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SIST EN 60077-2:2018
– 8 – IEC 60077-2:2017 © IEC 2017
3.1.2
passive electrical component
simple device or assembly of devices which are not included in the active electrical
components group and have at least one electrical function (e.g. mounting insulator,
permanent connection, resistor, capacitor, etc.)
3.1.3
switchgear and controlgear
general term covering switching devices and their combination with associated control,
measuring, protective and regulating equipment, also assemblies of such devices and
equipment with associated interconnections, accessories, enclosures and supporting
structures
[SOURCE: IEC 60050-441:1984 / AMD1:2007, 441-11-01]
3.1.4
switchgear
general term covering switching devices and their combination with associated control,
measuring, protective and regulating equipment, also assemblies of such devices and
equipment with associated interconnections, accessories, enclosures and supporting
structures, intended in principle for use in connection with generation, transmission,
distribution and conversion of electric energy
[SOURCE: IEC 60050-441:1984 / AMD1:2007, 441-11-02]
3.1.5
controlgear
general term covering switching devices and their combination with associated control,
measuring, protective and regulating equipment, also assemblies of such devices and
equipment with associated interconnections, accessories, enclosures and supporting
structures, intended in principle for the control of electric energy consuming equipment
[SOURCE: IEC 60050-441:1984 / AMD1:2007, 441-11-03]
3.1.6
switching device
device designed to make or break the current in one or more electric circuits
Note 1 to entry: A switching device may perform one or both of these operations.
[SOURCE: IEC 60050-441:1984 / AMD1:2007, 441-14-01, modified – Note 1 to entry has
been added.]
3.1.7
fuse
device that, by the
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