Electrical resistance trace heating systems for industrial and commercial applications - Part 1: General and testing requirements

IEC 62395-1:2013 specifies requirements for electrical resistance trace heating systems and includes general test requirements. This second edition cancels and replaces the previous edition published in 2006 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: - Tests have been added for trace heating on sprinkler systems; - The flammability test has been changed to align with the latest draft of future IEC/IEEE 60079-30-1; - A supplementary test has been added for the verification of sheath temperature using trace heating mounted on a plate fixture.

Elektrische Widerstands-Begleitheizungen für industrielle und gewerbliche Zwecke - Teil 1: Allgemeine Anforderungen und Prüfanforderungen

Systèmes de traçage par résistance électrique pour applications industrielles et commerciales - Partie 1: Exigences générales et d'essai

La CEI 62395-1:2013 spécifie les exigences relatives aux systèmes de traçage par résistance électrique et comprend les exigences générales d'essai. Cette deuxième édition annule et remplace l'édition précédente publiée en 2006 et constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: - Ajout d'essais pour le traçage sur les installations d'arrosage; - Modification de l'essai d'inflammabilité en vue d'une adaptation à la dernière version de la future norme CEI/IEEE 60079-30-1; - Ajout d'un essai supplémentaire permettant de vérifier la température de gaine à l'aide d'un système de traçage monté sur une plaque de fixation.

Industrijski in komercialni sistemi električnih uporovnih grelnih trakov - 1. del: Splošno in zahteve za preskušanje (IEC 62395-1:2013)

General Information

Status
Published
Publication Date
05-Dec-2013
Current Stage
6060 - Document made available
Due Date
06-Dec-2013
Completion Date
06-Dec-2013

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SIST EN 62395-1:2014
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SIST EN 62395-1:2007

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Electrical resistance trace heating systems for industrial and commercial applications -

Part 1: General and testing requirements
Systèmes de traçage par résistance électrique pour applications industrielles et
commerciales - Partie 1: Exigences générales et d'essai
Ta slovenski standard je istoveten z: EN 62395-1:2013
ICS:
25.180.10 (OHNWULþQHSHþL Electric furnaces
SIST EN 62395-1:2014 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 62395-1:2014
---------------------- Page: 2 ----------------------
SIST EN 62395-1:2014
EUROPEAN STANDARD
EN 62395-1
NORME EUROPÉENNE
December 2013
EUROPÄISCHE NORM
ICS 25.180.10 Supersedes EN 62395-1:2006
English version
Electrical resistance trace heating systems for industrial
and commercial applications -
Part 1: General and testing requirements
(IEC 62395-1:2013)
Systèmes de traçage par résistance Elektrische Widerstands-Begleitheizungen

électrique pour applications industrielles für industrielle und gewerbliche Zwecke -

et commerciales - Teil 1: Allgemeine Anforderungen und
Partie 1: Exigences générales et d'essai Prüfanforderungen
(CEI 62395-1:2013) (IEC 62395-1:2013)

This European Standard was approved by CENELEC on 2013-10-14. 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, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62395-1:2013 E
---------------------- Page: 3 ----------------------
SIST EN 62395-1:2014
EN 62395-1:2013 - 2 -
Foreword

The text of document 27/926/FDIS, future edition 2 of IEC 62395-1, prepared by IEC/TC 27 "Industrial

electroheating and electromagnetic processing" was submitted to the IEC-CENELEC parallel vote and

approved by CENELEC as EN 62395-1:2013.
The following dates are fixed:
(dop) 2014-07-14
• 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) 2016-10-14
standards conflicting with the
document have to be withdrawn
This document supersedes EN 62395-1:2006.

EN 62395-1:2013 includes the following significant technical changes with respect to

EN 62395-1:2006:
- tests have been added for trace heating on sprinkler systems;

- the flammability test has been changed to align with the latest draft of future

IEC/IEEE 60079-30-1 ;

- a supplementary test has been added for the verification of sheath temperature using trace heating

mounted on a plate fixture.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such

patent rights.

This standard covers the Principle Elements of the Safety Objectives for Electrical Equipment

Designed for Use within Certain Voltage Limits (LVD - 2006/95/EC).
Endorsement notice

The text of the International Standard IEC 62395-1:2013 was approved by CENELEC as a European

Standard without any modification.
Under consideration.
---------------------- Page: 4 ----------------------
SIST EN 62395-1:2014
- 3 - EN 62395-1:2013
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. 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
IEC 60068-2-5 - Environmental testing - EN 60068-2-5 -
Part 2-5: Tests - Test Sa: Simulated solar
radiation at ground level and guidance for
solar radiation testing
IEC 60519-1 - Safety in electroheating installations - EN 60519-1 -
Part 1: General requirements
IEC 60519-10 - Safety in electroheating installations - EN 60519-10 -
Part 10: Particular requirements for electrical
resistance trace heating systems for
industrial and commercial applications
IEC 62395-2 2013 Electrical resistance trace heating systems EN 62395-2 2013
for industrial and commercial applications -
Part 2: Application guide for system design,
installation and maintenance
ASTM D 5025-05 - Standard Specification for Laboratory Burner
Used for Small-Scale Burning Tests on
Plastic Materials
ASTM D 5207-09 - Standard Practice for Confirmation of 20-mm
(50-W) and 125-mm (500-W) Test Flames
for Small-Scale Burning Tests on Plastic
Materials
---------------------- Page: 5 ----------------------
SIST EN 62395-1:2014
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SIST EN 62395-1:2014
IEC 62395-1
Edition 2.0 2013-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electrical resistance trace heating systems for industrial and commercial
applications –
Part 1: General and testing requirements
Systèmes de traçage par résistance électrique pour applications industrielles et
commerciales –
Partie 1: Exigences générales et d'essai
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX X
ICS 25.180.10 ISBN 978-2-8322-1079-6

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
---------------------- Page: 7 ----------------------
SIST EN 62395-1:2014
– 2 – 62395-1 © IEC:2013
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope ............................................................................................................................... 7

2 Normative references ....................................................................................................... 8

3 Terms and definitions ....................................................................................................... 8

4 General requirements ..................................................................................................... 13

4.1 General ................................................................................................................. 13

4.2 Electrically conductive covering ............................................................................. 13

4.3 Electrical circuit protection requirements for branch circuits .................................. 13

4.4 Temperature requirements .................................................................................... 14

4.4.1 General ..................................................................................................... 14

4.4.2 Stabilized design ....................................................................................... 14

4.4.3 Controlled design ...................................................................................... 14

5 Testing ........................................................................................................................... 14

5.1 Type tests – General ............................................................................................. 14

5.2 Type tests – All applications .................................................................................. 14

5.2.1 Dielectric test ............................................................................................ 14

5.2.2 Electrical insulation resistance test ............................................................ 15

5.2.3 Flammability test ....................................................................................... 16

5.2.4 Room temperature impact test ................................................................... 17

5.2.5 Minimum temperature impact test .............................................................. 19

5.2.6 Deformation test ........................................................................................ 20

5.2.7 Cold bend test ........................................................................................... 21

5.2.8 Water resistance test ................................................................................. 22

5.2.9 Integral components resistance to water test ............................................. 22

5.2.10 Verification of rated output ......................................................................... 23

5.2.11 Thermal stability of electrical insulating material ........................................ 25

5.2.12 Thermal performance test for parallel trace heaters ................................... 26

5.2.13 Determination of maximum sheath temperature ......................................... 27

5.2.14 Verification of start-up current ................................................................... 34

5.2.15 Verification of the electrical resistance of the electrically conductive

covering .................................................................................................... 34

5.2.16 Strain relief test for connections (terminations) .......................................... 34

5.3 Type tests – Additional tests for outdoor exposed surface heating

installations without thermal insulation .................................................................. 35

5.3.1 Verification of rated output ......................................................................... 35

5.3.2 Determination of maximum sheath temperature ......................................... 35

5.3.3 Increased moisture resistance test ............................................................ 35

5.3.4 UV test ...................................................................................................... 35

5.3.5 Resistance to cutting test .......................................................................... 35

5.3.6 Abrasion test ............................................................................................. 35

5.3.7 Tension test ............................................................................................... 36

5.3.8 Rail system voltage spike test ................................................................... 36

5.3.9 Rail system over-voltage test ..................................................................... 37

5.4 Type tests – Additional tests and test modifications for embedded heating

applications ........................................................................................................... 37

5.4.1 Verification of rated output ......................................................................... 37

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SIST EN 62395-1:2014
62395-1 © IEC:2013 – 3 –

5.4.2 Determination of maximum sheath temperature ......................................... 37

5.4.3 Resistance to cutting test .......................................................................... 37

5.4.4 Flammability test ....................................................................................... 37

5.5 Type tests – Additional tests for applications of trace heating internal to

conduit and piping ................................................................................................. 37

5.5.1 Verification of rated output ......................................................................... 37

5.5.2 Determination of maximum sheath temperature ......................................... 37

5.5.3 Increased moisture resistance test ............................................................ 37

5.5.4 Pull-strength test ....................................................................................... 38

5.6 Type tests – Additional requirements for sprinkler systems .................................... 38

5.6.1 Normal and abnormal operation test .......................................................... 38

5.6.2 Normal operation test ................................................................................ 38

5.6.3 Abnormal operation test ............................................................................. 41

5.7 Routine tests ......................................................................................................... 41

5.7.1 Dielectric test ............................................................................................ 41

5.7.2 Verification of rated output ......................................................................... 41

6 Marking .......................................................................................................................... 41

6.1 General ................................................................................................................. 41

6.2 Product markings .................................................................................................. 42

7 Installation instructions ................................................................................................... 42

Bibliography .......................................................................................................................... 44

Figure 1 – Flammability test .................................................................................................. 17

Figure 2 – Room temperature impact test ............................................................................. 18

Figure 3 – Example of room temperature impact test apparatus ............................................ 19

Figure 4 – Example of minimum temperature impact test apparatus ...................................... 20

Figure 5 – Cold bend test ...................................................................................................... 22

Figure 6 – Moisture resistance test ....................................................................................... 23

Figure 7 – Verification of rated output ................................................................................... 25

Figure 8 – Pipe fixture........................................................................................................... 29

Figure 9 – Plate fixture.......................................................................................................... 30

Figure 10 – Plate fixture when trace heaters are allowed to touch ......................................... 31

Figure 11 – Maximum sheath temperature using the product approach ................................. 34

Figure 12 – Abrasion test ...................................................................................................... 36

Figure 13 – Sprinkler system temperature control test – branch line arrangement ................. 39

Figure 14 – Sprinkler system temperature control test – branch line – alternative

arrangement ......................................................................................................................... 40

Figure 15 – Sprinkler system temperature control test – supply pipe arrangement ................ 40

Table 1 – Test voltages for the dielectric test ........................................................................ 15

Table 2 – Product marking .................................................................................................... 42

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SIST EN 62395-1:2014
– 4 – 62395-1 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTRICAL RESISTANCE TRACE HEATING SYSTEMS
FOR INDUSTRIAL AND COMMERCIAL APPLICATIONS –
Part 1: General and testing requirements
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 62395-1 has been prepared by IEC technical committee 27:

Industrial electroheating and electromagnetic processing.

This second edition cancels and replaces the previous edition published in 2006 and

constitutes a technical revision.

This edition includes the following significant technical changes with respect to the previous

edition:
– Tests have been added for trace heating on sprinkler systems;

– The flammability test has been changed to align with the latest draft of future

IEC/IEEE 60079-30-1 ;
—————————
Under consideration.
---------------------- Page: 10 ----------------------
SIST EN 62395-1:2014
62395-1 © IEC:2013 – 5 –

– A supplementary test has been added for the verification of sheath temperature using

trace heating mounted on a plate fixture.
The text of this standard is based on the following documents:
FDIS Report on voting
27/926/FDIS 27/935/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.

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts in the IEC 62395 series, published under the general title Electrical

resistance trace heating systems for industrial and commercial applications, 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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
---------------------- Page: 11 ----------------------
SIST EN 62395-1:2014
– 6 – 62395-1 © IEC:2013
INTRODUCTION

IEC 62395-1 provides the essential requirements and testing appropriate to electrical

resistance trace heating equipment used in industrial and commercial applications. While

some of this work already exists in national or international standards, this standard has

collated much of this existing work and added considerably to it.

IEC 62395-2 provides detailed recommendations for the system design, installation and

maintenance of electric trace heating systems in industrial and commercial applications.

It is the objective of IEC 62395 that, when in normal use, electrical trace heating systems

operate safely under their defined conditions of use, by

a) employing heaters of the appropriate construction and meeting the test criteria detailed in

IEC 62395-1. The construction includes a metallic sheath, braid, screen or equivalent

electrically conductive covering;

b) operating at safe temperatures when designed, installed, and maintained in accordance

with IEC 62395-2.

c) having at least the minimum levels of overcurrent and earth-fault protection required in

IEC 62395-1 and IEC 62395-2.
---------------------- Page: 12 ----------------------
SIST EN 62395-1:2014
62395-1 © IEC:2013 – 7 –
ELECTRICAL RESISTANCE TRACE HEATING SYSTEMS
FOR INDUSTRIAL AND COMMERCIAL APPLICATIONS –
Part 1: General and testing requirements
1 Scope

This part of IEC 62395 specifies requirements for electrical resistance trace heating systems

and includes general test requirements.

This standard pertains to trace heating systems that may comprise either factory-fabricated or

field-assembled (work-site) units, and which may be series and parallel trace heaters or

surface heaters (heater pads and heater panels) that have been assembled and/or terminated

in accordance with the manufacturer’s instructions.

This standard also includes requirements for termination assemblies and control methods

used with trace heating systems.

This standard provides the essential requirements and testing appropriate to electrical

resistance trace heating equipment used in industrial and commercial applications. The

products certified according to this standard are intended to be installed by persons who are

suitably trained in the techniques required and that only trained personnel carry out especially

critical work, such as the installation of connections and terminations. Installations are

intended to be carried out under the supervision of a qualified person who has undergone

supplementary training in electric trace heating systems.

This standard does not include or provide for any applications in potentially explosive

atmospheres.
This standard does not cover induction, impedance or skin effect heating.

Trace heating systems can be grouped into different types of applications and the different

conditions found during and after installation necessitate different requirements for testing.

Trace heating systems are usually certified for a specific type of installation or application.

Typical applications for the different types of installation include, but are not limited to:

a) installations of trace heating for surface heating on pipes, vessels and associated

equipment – applications include:
– freeze protection and temperature maintenance;
– hot water lines;
– oil and chemical lines;
– sprinkler system mains and supply piping;
b) outdoor exposed area installations of trace heating – applications include:
– roof de-icing;
– gutter and down-spout de-icing;
– catch basins and drains;
– rail heating ;
—————————

Further evaluation may be required to address application specific conditions such as fluctuations in impressed

voltage and voltage spikes.
---------------------- Page: 13 ----------------------
SIST EN 62395-1:2014
– 8 – 62395-1 © IEC:2013
c) installation with embedded trace heating – applications include:
– snow melting;
– frost heave protection;
– floor warming;
– energy storage systems;
– door frames;

d) installations of trace heating internal to conduit and piping – applications include:

– snow melting – in conduit;
– frost heave protection – in conduit;
– floor warming – in conduit;
– energy storage systems – in conduit;
– internal trace heating for freeze protection of potable water lines;
– enclosed drains and culverts.
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.

IEC 60068-2-5, Environmental testing – Part 2-5: Tests – Test Sa: Simulated solar radiation at

ground level and guidance for solar radiation testing

IEC 60519-1, Safety in electroheating installations – Part 1: General requirements

IEC 60519-10, Safety in electroheating installations – Part 10: Particular requirements for

electrical resistance trace heating systems for industrial and commercial applications

IEC 62395-2:2013, Electrical resistance trace heating systems for industrial and commercial

applications – Part 2: Application guide for system design, installation and maintenance

ASTM D 5025-05, Standard Specification for Laboratory Burner Used for Small-Scale Burning

Tests on Plastic Materials

ASTM D 5207-09, Standard Practice for Confirmation of 20-mm (50-W) and 125-mm (500-W)

Test Flames for Small-Scale Burning Tests on Plastic Materials
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60519-10 and the

following apply.

NOTE 1 General definitions are given in the International Electrotechnical Vocabulary, IEC 60050. Terms relating

to industrial electroheat are defined in IEC 60050-841.

NOTE 2 The terms defined in this clause are used both in IEC 62395-1 and IEC 62395-2.

3.1
ambient temperature
temperature surrounding the object under consideration
---------------------- Page: 14 ----------------------
SIST EN 62395-1:2014
62395-1 © IEC:2013 – 9 –

Note 1 to entry: Where trace heaters or surface heaters are enclosed in thermal insulation, the ambient

temperature is the temperature exterior to such thermal insulation.
3.1.1
maximum ambient temperature
the highest specified ambient temperature
3.1.2
minimum ambient temperature
the lowest specified ambient temperature

Note 1 to entry: Heat-loss calculations in IEC 62395-2 are based on the minimum ambient temperature.

3.2
branch circuit
portion of t
...

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