EN 60269-1:2007

Low-voltage fuses - Part 1: General requirements

This part of IEC 60269 is applicable to fuses incorporating enclosed current-limiting fuse-links with rated breaking capacities of not less than 6 kA, intended for protecting power-frequency a.c. circuits of nominal voltages not exceeding 1 000 V or d.c. circuits of nominal voltages not exceeding 1 500 V. Subsequent parts of this standard, referred to herein, cover supplementary requirements for such fuses intended for specific conditions of use or applications.

Niederspannungssicherungen - Teil 1: Allgemeine Anforderungen

Fusibles basse tension - Partie 1: Exigences générales

La présente partie de la CEI 60269 est applicable aux fusibles avec éléments de remplacement limiteurs de courant à fusion enfermée et à pouvoir de coupure égal ou supérieur à 6 kA, destinés à assurer la protection des circuits à courant alternatif à fréquence industrielle dont la tension nominale ne dépasse pas 1 000 V, ou des circuits à courant continu dont la tension nominale ne dépasse pas 1 500 V. Des parties subséquentes, auxquelles la présente norme se réfère, énoncent des exigences supplémentaires applicables aux fusibles prévus pour des conditions d'utilisation ou des applications particulières.

Nizkonapetostne varovalke – 1. del: Splošne zahteve (IEC 60269-1:2006)

General Information

• Status: Published
• Publication Date: 24-May-2007
• Withdrawal Date: 28-Feb-2010
• ICS: 29.120.50 - Fuses and other overcurrent protection devices
• Technical Committee: CLC/SR 32B - Low-voltage fuses
• Drafting Committee: IEC/SC 32B - IEC_SC_32B
• Parallel Committee: IEC/SC 32B - IEC_SC_32B
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 25-May-2007
• Completion Date: 25-May-2007
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 2014/53/EU - Directive 2014/53/EU of The European Parliament and of the Council of 16 April 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of radio equipment and repealing Directive 1999/5/EC
• Directive: 73/23/EEC - Electrical equipment designed for use within certain voltage limits
• Ref Project: SIST EN 60269-1:2007 - Low-voltage fuses -- Part 1: General requirements

Relations

• Replaces: EN 60269-3:1995/A1:2003 - Low-voltage fuses - Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and similar applications)
• Effective Date: 29-Jan-2023
• Replaces: EN 60269-1:1998 - Low-voltage fuses - Part 1: General requirements
• Effective Date: 29-Jan-2023
• Replaces: EN 60269-3:1995 - Low-voltage fuses - Part 3: Supplementary requirements for fuses for use by unskilled persons (fuses mainly for household and similar applications)
• Effective Date: 29-Jan-2023
• Replaces: EN 60269-2:1995 - Low-voltage fuses - Part 2: Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application)
• Effective Date: 29-Jan-2023
• Replaces: EN 60269-1:1998/A1:2005 - Low-voltage fuses - Part 1: General requirements
• Effective Date: 29-Jan-2023
• Replaces: EN 60269-2:1995/A2:2002 - Low-voltage fuses - Part 2: Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application)
• Effective Date: 29-Jan-2023
• Replaces: EN 60269-2:1995/A1:1998 - Low-voltage fuses - Part 2: Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application)
• Effective Date: 28-Jan-2023
• Amended By: EN 60269-1:2007/A1:2009 - Low-voltage fuses - Part 1: General requirements
• Effective Date: 29-Jan-2023
• Amended By: EN 60269-1:2007/A2:2014 - Low-voltage fuses - Part 1: General requirements
• Effective Date: 28-Jan-2023
• Revised: FprEN IEC 60269-1:2024 - Low-voltage fuses - Part 1: General requirements
• Effective Date: 01-Jun-2021

Standards Content (Sample)

SLOVENSKI STANDARD
01-november-2007
1DGRPHãþD
SIST EN 60269-1:2000
SIST EN 60269-1:2000/A1:2006
SIST EN 60269-2:1995
SIST EN 60269-2:1995/A1:1999
SIST EN 60269-2:1995/A2:2003
SIST EN 60269-3:1995
SIST EN 60269-3:1995/A1:2004
Nizkonapetostne varovalke – 1. del: Splošne zahteve (IEC 60269-1:2006)
Low-voltage fuses -- Part 1: General requirements (IEC 60269-1:2006)
Niederspannungssicherungen -- Teil 1: Allgemeine Anforderungen (IEC 60269-1:2006)
Fusibles basse tension -- Partie 1: Exigences générales (IEC 60269-1:2006)
Ta slovenski standard je istoveten z: EN 60269-1:2007
ICS:
29.120.50 9DURYDONHLQGUXJD Fuses and other overcurrent
PHGWRNRYQD]DãþLWD protection devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 60269-1
NORME EUROPÉENNE
May 2007
EUROPÄISCHE NORM
ICS 29.120.50 Supersedes EN 60269-1:1998 + A1:2005, partially supersedes EN 60269-2:1995 + A1:1998 +
A2:2002 and EN 60269-3:1995 + A1:2003

English version
Low-voltage fuses -
Part 1: General requirements
(IEC 60269-1:2006)
Fusibles basse tension -  Niederspannungssicherungen -
Partie 1: Exigences générales Teil 1: Allgemeine Anforderungen
(CEI 60269-1:2006) (IEC 60269-1:2006)

This European Standard was approved by CENELEC on 2007-03-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Cyprus, the
Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2007 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 60269-1:2007 E
Foreword
The text of document 32B/483/FDIS, future edition 4 of IEC 60269-1, prepared by SC 32B, Low-voltage
fuses, of IEC TC 32, Fuses, was submitted to the IEC-CENELEC parallel vote and was approved by
CENELEC as EN 60269-1 on 2007-03-01.
This European Standard supersedes EN 60269-1:1998 + A1:2005, it also partially supersedes
EN 60269-2:1995 + A1:1998 + A2:2004 and EN 60269-3:1995 + A1:2003.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2008-03-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2010-03-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice
The text of the International Standard IEC 60269-1:2006 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 60127 NOTE Harmonized in EN 60127 series (not modified).
IEC 60947-3 NOTE Harmonized as EN 60947-3:1999 (not modified).
__________
- 3 - EN 60269-1:2007
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

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.

NOTE  When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
Publication Year Title EN/HD Year

1)
IEC 60038 (mod) 1983 IEC standard voltages HD 472 S1 1989
+ corr. February 2002
IEC 60050-441 1984 International Electrotechnical Vocabulary - -
A1 2000 (IEV) -
Chapter 441: Switchgear, controlgear and
fuses
2) 3)
IEC 60269-2 - Low-voltage fuses - HD 60269-2 2007
Part 2: Supplementary requirements for fuses
for use by authorized persons (fuses mainly
for industrial application) - Examples of
standardized systems of fuses A to I

2) 3)
IEC 60269-3 - Low-voltage fuses - HD 60269-3 2007
Part 3: Supplementary requirements for fuses
for use by unskilled persons (fuses mainly for
household or similar applications) - Examples
of standardized systems of fuses A to F

2) 3)
IEC 60269-4 - Low-voltage fuses - EN 60269-4 2007
Part 4: Supplementary requirements for fuse-
links for the protection of semiconductor
devices
IEC 60364-3 (mod) 1993 Electrical installations of buildings - HD 384.3 S2 1995
Part 3: Assessment of general characteristics

IEC 60364-5-52 2001 Electrical installations of buildings - - -
Part 5-52: Selection and erection of electrical
equipment - Wiring systems
IEC 60529 1989 Degrees of protection provided by EN 60529 1991
enclosures (IP Code) + corr. May 1993

1)
The title of HD 472 S1 is: Nominal voltages for low voltage public electricity supply systems.
2)
Undated reference.
3)
Valid edition at date of issue.

Publication Year Title EN/HD Year
IEC 60584-1 1995 Thermocouples - EN 60584-1 1995
Part 1: Reference tables
IEC 60617 data- Graphical symbols for diagrams - -
base
IEC 60664-1 1992 Insulation coordination for equipment within
+ A1 2000 low-voltage systems -
+ A2 2002 Part 1: Principles, requirements and tests EN 60664-1 2003

4)
IEC 60695-2-1/0 1994 Fire hazard testing - EN 60695-2-1/0 1996
Part 2: Test methods - Section 1/sheet 0:
Glow-wire test methods - General

5)
IEC 60695-2-1/1 1994 Fire hazard testing - EN 60695-2-1/1 1996
Part 2: Test methods -
Section 1/sheet 1: Glow-wire end-product test
and guidance
6)
IEC 60695-2-1/2 1994 Fire hazard testing - EN 60695-2-1/2 1996
Part 2: Test methods -
Section 1/sheet 2: Glow-wire flammability test
on materials
7)
IEC 60695-2-1/3 1994 Fire hazard testing - EN 60695-2-1/3 1996
Part 2: Test methods -
Section 1/sheet 3: Glow-wire ignitability test
on materials
ISO 3 1973 Preferred numbers - Series of preferred - -
numbers
ISO 478 1974 Paper - Untrimmed stock sizes for the ISO-A - -
series - ISO primary range
ISO 593 1974 Paper - Untrimmed stock size for the ISO-A - -
series - ISO supplementary range

ISO 4046 1978 Paper, board, pulp and related terms - - -
Vocabulary
4)
EN 60695-2-1/0 is superseded by EN 60695-2-10:2001, which is based on IEC 60695-2-10:2000.
5)
EN 60695-2-1/1 is superseded by EN 60695-2-11:2001, which is based on IEC 60695-2-11:2000.
6)
EN 60695-2-1/2 is superseded by EN 60695-2-12:2001, which is based on IEC 60695-2-12:2000.
7)
EN 60695-2-1/3 is superseded by EN 60695-2-13:2001, which is based on IEC 60695-2-13:2000.

INTERNATIONAL IEC
STANDARD 60269-1
Fourth edition
2006-11
Low-voltage fuses –
Part 1:
General requirements
” IEC 2006 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical,
including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
PRICE CODE
Commission Electrotechnique Internationale XC
International Electrotechnical Commission
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For price, see current catalogue

60269-1 ¤ IEC:2006 – 3 –
CONTENTS
FOREWORD.9
INTRODUCTION.13
1 General .15
1.1 Scope and object.15
1.2 Normative references .17
2 Terms and definitions .19
2.1 Fuses and their component parts .19
2.2 General terms.21
2.3 Characteristic quantities .27
3 Conditions for operation in service .33
3.1 Ambient air temperature (T ) .33
a
3.2 Altitude.33
3.3 Atmospheric conditions.33
3.4 Voltage.35
3.5 Current.35
3.6 Frequency, power factor and time constant .35
3.7 Conditions of installation.35
3.8 Utilization category .35
3.9 Discrimination of fuse-links .37
4 Classification .37
5 Characteristics of fuses .37
5.1 Summary of characteristics.37
5.2 Rated voltage .39
5.3 Rated current .39
5.4 Rated frequency (see 6.1 and 6.2) .39
5.5 Rated power dissipation of a fuse-link and rated acceptable power dissipation
of a fuse-holder .41
5.6 Limits of time-current characteristics.41
5.7 Breaking range and breaking capacity.45
5.8 Cut-off current and I t characteristics.47
6 Markings.47
6.1 Markings of fuse-holders .47
6.2 Markings of fuse-links.49
6.3 Marking symbols.49
7 Standard conditions for construction .49
7.1 Mechanical design .49
7.2 Insulating properties and suitability for isolation.51
7.3 Temperature rise, power dissipation of the fuse-link and acceptable power
dissipation of a fuse-holder .53
7.4 Operation .55
7.5 Breaking capacity .57
7.6 Cut-off current characteristic.57
7.7 I t characteristics .57
7.8 Overcurrent discrimination of fuse-links .59
7.9 Protection against electric shock.59

60269-1 ¤ IEC:2006 – 5 –
7.10 Resistance to heat.65
7.11 Mechanical strength.65
7.12 Resistance to corrosion .65
7.13 Resistance to abnormal heat and fire .65
7.14 Electromagnetic compatibility.
...

SLOVENSKI SIST EN 60269-1
STANDARD
november 2007
Nizkonapetostne varovalke – 1. del: Splošne zahteve (IEC 60269-1:2006)

Low-voltage fuses – Part 1: General requirements (IEC 60269-1:2006)

Fusibles basse tension – Partie 1: Exigences générales (CEI 60269-1:2006)

Niederspannungssicherungen – Teil 1: Allgemeine Anforderungen
(IEC 60269-1:2006)
Referenčna oznaka
ICS 29.120.50 SIST EN 60269-1:2007 (sl)

Nadaljevanje na straneh II in III ter od 1 do 78

© 2016-07. Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

SIST EN 60269-1 : 2007
NACIONALNI UVOD
Standard SIST EN 60269-1:2007 (sl), Nizkonapetostne varovalke – 1. del: Splošne zahteve (IEC
60269-1:2006), ima status slovenskega standarda in je enakovreden evropskemu standardu EN
60269-1:2007 (en), Low-voltage fuses – Part 1: General requirements (IEC 60269-1:2006), 2007-05.

NACIONALNI PREDGOVOR
Mednarodni standard IEC 60269-1:2006 je pripravil tehnični pododbor Mednarodne elektrotehniške
komisije IEC/SC 32B Nizkonapetostne varovalke, potrdil pa odbor Mednarodne elektrotehniške
komisije IEC 32 Varovalke. Vzporedno je standard potrdil tehnični odbor Evropskega komiteja za
standardizacijo v elektrotehniki CLC/TC 32 Varovalke, katerega tajništvo vodi DKE.

Slovenski standard SIST EN 60269-1:2007 je prevod evropskega standarda EN 60269-1:2007. V
primeru spora glede besedila slovenskega prevoda v tem standardu je odločilen izvirni evropski
standard v angleškem jeziku. Slovensko izdajo standarda je pripravil tehnični odbor SIST/TC EVA
Električne varovalke.
Odločitev za privzem tega standarda je 7. novembra 2007 sprejel tehnični odbor SIST/TC EVA
Električne varovalke.
TERMINOLOGIJA
V terminološki bazi IEC – Elektropediji se po skupini terminoloških standardov IEC 60050 uvajata
naslednja prevoda izrazov:
angl. nominal value, fr. valeur nominale, nem. Nennwert
nazivna vrednost: primerna približna vrednost veličine za opis ali prepoznavo sestavine, naprave,
stroja ali opreme (angl. a suitable approximate quantity value used to designate or identify a
component, device or equipment)
angl. rated value, fr. valeur assignée, nem. Bemessungswert
naznačena vrednost: vrednost veličine, ki jo navede proizvajalec za določene obratovalne pogoje
sestavine, naprave ali opreme (angl. a quantity value assigned, generally by a manufacturer, for a
specified operating condition of a component, device or equipment)

ZVEZA Z NACIONALNIMI STANDARDI

S privzemom tega evropskega standarda veljajo za omejeni namen referenčnih standardov vsi
standardi, navedeni v izvirniku, razen tistih, ki so že sprejeti v nacionalno standardizacijo:

SIST EN 60038:1996 Standardne napetosti IEC (nadomeščen s SIST EN 60038:2011)
SIST HD 60269-2 Nizkonapetostne varovalke – 2. del: Dodatne zahteve za varovalke, ki jih
uporabljajo strokovne osebe (uporaba varovalk zlasti v industriji) –
Primeri tipov standardiziranih varovalk od A do K
SIST HD 60269-3 Nizkonapetostne varovalke – 3. del: Dodatne zahteve za varovalke, ki jih
uporabljajo nestrokovne osebe (uporaba varovalk zlasti v gospodinjstvu
in podobnih okoljih) – Razdelki od A do F: Primeri tipov standardiziranih
varovalk
SIST EN 60269-4 Nizkonapetostne varovalke – 4. del: Dodatne zahteve za taljive vložke za
zaščito polprevodniških naprav
SIST-TP CLC/TR 60269-5 Nizkonapetostne varovalke – 5. del: Navodila za uporabo nizkonape-
tostnih varovalk
SIST HD 384.3 S2:2000 Električne inštalacije zgradb – 3. del: Ocena splošnih karakteristik
SIST IEC 60364-5-52:2006 Električne inštalacije zgradb – 5-52. del: Izbira in namestitev električne
opreme – Inštalacijski sistemi
II
SIST EN 60269-1 : 2007
SIST EN 60529:1997 Stopnja zaščite, ki jo zagotavlja ohišje (koda IP)
SIST EN 60584-1:1998 Termočleni – 1. del: Specifikacije potencialov (EMF) in tolerance
SIST EN 60617 Grafični simboli za sheme
SIST EN 60664-1:2004 Uskladitev izolacije za opremo v okviru nizkonapetostnih sistemov –
1. del: Načela, zahteve in preskusi
SIST EN 60695-2-1/0:1999 Preskušanje požarne ogroženosti – 2. del: Preskusne metode – Oddelek
1/list 0: Preskusne metode z žarilno žico – Splošno (nadomeščen s SIST
EN 60695-2-10:2013)
SIST EN 60695-2-1/1:1999 Preskušanje požarne ogroženosti – 2. del: Preskusne metode – Oddelek
1/list 1: Preskus končnega proizvoda z žarilno žico in navodilo
(nadomeščen s SIST EN 60695-2-11:2014)
SIST EN 60695-2-1/2:1999 Preskušanje požarne ogroženosti – 2. del: Preskusne metode – Oddelek
1/list 2: Preskus vnetljivosti materialov z žarilno žico (nadomeščen s SIST
EN 60695-2-12:2011)
SIST EN 60695-2-1/3:1999 Preskušanje požarne ogroženosti – 2. del: Preskusne metode – Oddelek
1/list 3: Preskus vžigljivosti materialov z žarilno žico (nadomeščen s SIST
EN 60695-2-13:2011)
SIST ISO 3:1995 Standardna števila – Standardne vrste števil
SIST EN ISO 217:2013 Papir – Neobrezane pole – Označevanje in dovoljena odstopanja za
osnovne in dopolnilne formate ter navedba vzdolžne smeri vlaken v
papirju (MD) (ISO 217:2013) (nadomestil ISO 478:1974)
SIST ISO 4046 Papir, karton, lepenka, vlaknine in izdelki iz teh materialov – Slovar
(razveljavljen)
OSNOVA ZA IZDAJO STANDARDA
– privzem standarda EN 60269-1:2007

PREDHODNA IZDAJA
– SIST EN 60269-1:2000, Low-voltage fuses – Part 1: General requirements (IEC 60269-1:1998)
– SIST EN 60269-1:2000/A1:2006, Nizkonapetostne varovalke – 1. del: Splošne zahteve (IEC
60269-1:1998/A1:2005)
OPOMBE
– Povsod, kjer se v besedilu standarda uporablja izraz "evropski" ali "mednarodni" standard, v
– Nacionalni uvod in nacionalni predgovor nista sestavni del standarda.

– Ta nacionalni dokument je enakovreden EN 60269-1:2007 in je objavljen z dovoljenjem

CEN/CENELEC
Rue de Stassart 36
1050 Bruselj
Belgija
This national document is identical with EN 60269-1:2007 and is published with the permission of

CEN /CENELEC
Rue de Stassart, 36
1050 Bruxelles
Belgium
III
EVROPSKI STANDARD EN 60269-1
EUROPEAN STANDARD
NORME EUROPÉENNE
EUROPÄISCHE NORM maj 2007
ICS: 29.120.50 Nadomešča EN 60269-1:1998 + A1:2005; delno nadomešča EN 60269-2:1995
+ A1:1998 + A2:2002 in EN 60269-3:1995 + A1:2003

Slovenska izdaja
Nizkonapetostne varovalke – 1. del: Splošne zahteve (IEC 60269-1:2006)

Low-voltage fuses – Fusibles basse tension – Niederspannungssicherungen –
Part 1: General requirements Partie 1: Exigences générales Teil 1: Allgemeine Anforderungen
(IEC 60269-1:2006) (CEI 60269-1:2006) (IEC 60269-1:2006)

Ta evropski standard je CENELEC sprejel 1. marca 2007. Člani CENELEC morajo izpolnjevati
notranje predpise CEN/CENELEC, s katerimi so predpisani pogoji za privzem tega evropskega
standarda na nacionalno raven brez kakršnihkoli sprememb.

Najnovejši seznami teh nacionalnih standardov z njihovimi bibliografskimi podatki se na zahtevo lahko
dobijo pri Centralnem sekretariatu ali kateremkoli članu CENELEC.

Ta evropski standard obstaja v treh uradnih izdajah (angleški, francoski in nemški). Izdaje v drugih
jezikih, ki jih člani CENELEC na lastno odgovornost prevedejo in izdajo ter prijavijo pri Centralnem
sekretariatu, veljajo kot uradne izdaje.

Člani CENELEC so nacionalni elektrotehniški komiteji Avstrije, Belgije, Bolgarije, Cipra, Češke
republike, Danske, Estonije, Finske, Francije, Grčije, Islandije, Irske, Italije, Latvije, Litve,
Luksemburga, Madžarske, Malte, Nemčije, Nizozemske, Norveške, Poljske, Portugalske, Romunije,
Slovaške, Slovenije, Španije, Švedske in Združenega kraljestva.

CENELEC
Evropski komite za standardizacijo v elektrotehniki
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Centralni sekretariat: Rue de Stassart 35, B-1050 Bruselj

© 2007 CENELEC Lastnice avtorskih pravic so vse države članice CENELEC. Ref. št. EN 60269-1:2007 E

SIST EN 60269-1 : 2007
VSEBINA Stran
Predgovor k evropskemu standardu . 5
Dodatek ZA (normativni): Sklicevanje na mednarodne publikacije z njihovimi ustreznimi
evropskimi publikacijami . 6
Predgovor k mednarodnemu standardu . 8
Uvod . 10
1 Splošno . 11
1.1 Področje uporabe in predmet standarda . 11
1.2 Zveze s standardi . 11
2 Izrazi in definicije . 12
3 Pogoji za delovanje in uporabo . 19
3.1 Temperatura zraka okolice (T ) . 19
a
3.2 Nadmorska višina . 19
3.3 Atmosferske razmere . 20
3.4 Napetost . 20
3.5 Tok . 20
3.6 Frekvenca, faktor moči in časovna konstanta . 20
3.7 Pogoji za vgradnjo . 20
3.8 Kategorija uporabe . 20
3.9 Selektivnost taljivih vložkov . 21
4 Razvrstitev . 21
5 Karakteristike varovak . 21
5.1 Povzetek karakteristik . 21
5.2 Naznačena napetost . 21
5.3 Naznačeni tok . 22
5.4 Naznačena frekvenca . 22
5.5 Naznačena izgubna moč taljivega vložka in naznačena sprejemljiva izgubna moč držala
varovalke . 22
5.6 Meje tokovno-časovne karakteristike . 22
5.7 Prekinitveno območje in izklopna zmogljivost . 24
5.8 Karakteristike odrezanih tokov in karakteristike I t . 25
6 Označevanje . 26
6.1 Označevanje držal varovalke . 26
6.2 Označevanje taljivih vložkov . 26
6.3 Simboli za označevanje . 26
7 Standardni konstrukcijski pogoji . 27
7.1 Mehanska konstrukcija . 27
7.2 Izolacijske lastnosti in primernost za galvansko ločitev . 28
7.3 Dvig temperature, izgubna moč taljivega vložka in sprejemljiva izgubna moč držala
varovalke . 28
7.4 Delovanje . 29
7.5 Izklopna zmogljivost . 30
7.6 Karakteristike odrezanega toka . 30
7.7 Karakteristike I t . 31
7.8 Nadtokovna selektivnost taljivih vložkov . 31
7.9 Zaščita pred električnim udarom . 31
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