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

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 heater cables, parallel heater cables, heater pads or heater panels that have been assembled and/or terminated in accordance with the manufacturer's instructions for connection to voltage supplies up to and including 450-750 V. This standard also includes requirements for termination assemblies and control methods used with 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.

Elektrische Begleitheizungen Trace-Widerstandsheizungen 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

Spécifie les exigences pour les systèmes de traçage par résistance électrique et comprend les exigences générales relatives aux essais. Comprend aussi des exigences concernant les ensembles de terminaisons et les méthodes de commande appliquées aux systèmes de traçage par résistance.

Industrijski in komercialni sistemi električnih uporovnih grelnih trakov - 1. del: Splošne in preskusne zahteve (IEC 62395-1:2006)

General Information

Status
Withdrawn
Publication Date
31-Dec-2006
Withdrawal Date
07-Nov-2016
Technical Committee
Current Stage
9900 - Withdrawal (Adopted Project)
Start Date
08-Nov-2016
Due Date
01-Dec-2016
Completion Date
08-Nov-2016

RELATIONS

Buy Standard

Standard
SIST EN 62395-1:2007
English language
34 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI SIST EN 62395-1:2007
STANDARD
januar 2007
Industrijski in komercialni sistemi električnih uporovnih grelnih trakov - 1.
del: Splošne in preskusne zahteve (IEC 62395-1:2006)
(istoveten EN 62395-1:2006)
Electrical resistance trace heating systems for industrial and commercial
applications - Part 1: General and testing requirements (IEC 62395-1:2006)
ICS 25.180.10 Referenčna številka
SIST EN 62395-1:2007(en)

© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno

---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 62395-1
NORME EUROPÉENNE
September 2006
EUROPÄISCHE NORM
ICS 25.180.10
English version
Electrical resistance trace heating systems
for industrial and commercial applications
Part 1: General and testing requirements
(IEC 62395-1:2006)
Systèmes de traçage par résistance Elektrische Begleitheizungen
électrique pour applications industrielles Trace-Widerstandsheizungen
et commerciales für industrielle und gewerbliche Zwecke
Partie 1: Exigences générales et d'essai Teil 1: Allgemeine Anforderungen
(CEI 62395-1:2006) und Prüfanforderungen
(IEC 62395-1:2006)

This European Standard was approved by CENELEC on 2006-09-01. 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 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, 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

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 62395-1:2006 E
---------------------- Page: 2 ----------------------
EN 62395-1:2006 - 2 -
Foreword

The text of document 27/533/FDIS, future edition 1 of IEC 62395-1, prepared by IEC TC 27, Industrial

electroheating equipment, was submitted to the IEC-CENELEC parallel vote and was approved by

CENELEC as EN 62395-1 on 2006-09-01.
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) 2007-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 62395-1:2006 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following note has to be added for the standard indicated:

IEC 62086-1 NOTE Harmonized as EN 62086-1:2005 (not modified).
__________
---------------------- Page: 3 ----------------------
- 3 - EN 62395-1:2006
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
IEC 60050-841 2004 International Electrotechnical Vocabulary - -
(IEV)
Part 841: Industrial electroheat
1) 2)
IEC 60068-2-9 - Environmental testing EN 60068-2-9 1999
Part 2: Tests - Guidance for solar radiation
testing
IEC 60519-1 2003 Safety in electroheat installations EN 60519-1 2003
Part 1: General requirements
IEC 60519-10 2005 Safety in electroheat installations - -
Part 10: Particular requirements for electrical
resistance trace heating systems for industrial
and commercial applications
Undated reference.
Valid edition at date of issue.
---------------------- Page: 4 ----------------------
NORME CEI
INTERNATIONALE
IEC
62395-1
INTERNATIONAL
Première édition
STANDARD
First edition
2006-08
Systèmes de traçage par résistance électrique
pour applications industrielles et commerciales –
Partie 1:
Exigences générales et d’essai
Electrical resistance trace heating systems for
industrial and commercial applications –
Part 1:
General and testing requirements
 IEC 2006 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 any

utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including

électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from

microfilms, sans l'accord écrit de l'éditeur. the publisher.

International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland

Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch

CODE PRIX
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 5 ----------------------
62395-1  IEC:2006 – 3 –
CONTENTS

FOREWORD...........................................................................................................................5

INTRODUCTION.....................................................................................................................9

1 Scope and object............................................................................................................11

2 Normative references .....................................................................................................13

3 Terms and definitions .....................................................................................................13

4 General requirements .....................................................................................................23

4.1 General .................................................................................................................23

4.2 Metallic braids or sheaths......................................................................................23

4.3 Electrical circuit protection requirements for branch circuits ..................................23

4.4 Control and temperature requirements ..................................................................25

5 Testing ...........................................................................................................................25

5.1 Type tests – General .............................................................................................25

5.2 Type tests .............................................................................................................25

5.3 Type tests – Additional tests for outdoor exposed area installations without

thermal insulation ..................................................................................................51

5.4 Type tests – Additional tests for installations with embedded trace heater.............55

5.5 Type tests – Additional tests for installations with trace heater inside conduit

or piping................................................................................................................55

5.6 Routine tests .........................................................................................................57

6 Marking ..........................................................................................................................57

6.1 General .................................................................................................................57

6.2 Product markings ..................................................................................................57

6.3 Markings for field-assembled components .............................................................59

7 Installation instructions...................................................................................................59

Bibliography..........................................................................................................................61

Figure 1 – Flammability test..................................................................................................31

Figure 2 – Impact test ...........................................................................................................33

Figure 3 – Cold bend test......................................................................................................37

Figure 4 – Moisture resistance test .......................................................................................39

Figure 5 – Verification of rated output ...................................................................................43

Figure 6 – Verification of sheath temperature using system approach ...................................47

Figure 7 – Maximum sheath temperature using the product classification approach ..............49

Figure 8 – Abrasion test........................................................................................................55

Table 1 – Test voltages for the dielectric test........................................................................27

---------------------- Page: 6 ----------------------
62395-1  IEC:2006 – 5 –
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

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 equipment.
The text of this standard is based on the following documents:
FDIS Report on voting
27/533/FDIS 27/547/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.

---------------------- Page: 7 ----------------------
62395-1  IEC:2006 – 7 –

A list of all parts of IEC 62395, 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 maintenance result 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.
---------------------- Page: 8 ----------------------
62395-1  IEC:2006 – 9 –
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/TS 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

should operate safely under their defined conditions of use, by

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

Part 1. The construction should include a metallic sheath, braid, screen or equivalent

electrically conductive covering;

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

with Part 2;
c) having at least the minimum levels of overcurrent and ground fault protection
recommended in Part 2.

Some tests of Part 1 differ from similar tests developed by TC 20 and are to be reviewed in

the future. These and other tests are almost identical to the tests given in IEC 62086-1:2001

and are duplicated in Part 1 for completeness (see notes in the text).
—————————

Permission to reproduce the text of several tests from IEC 62086-1:2001 that are not specific to explosive gas

atmospheres has been granted by TC 31.
---------------------- Page: 9 ----------------------
62395-1  IEC:2006 – 11 –
ELECTRICAL RESISTANCE TRACE HEATING SYSTEMS
FOR INDUSTRIAL AND COMMERCIAL APPLICATIONS –
Part 1: General and testing requirements
1 Scope and object

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 heater cables, parallel heater

cables, heater pads or heater panels that have been assembled and/or terminated in

accordance with the manufacturer’s instructions for connection to voltage supplies up to and

including 450-750 V.

This standard also includes requirements for termination assemblies and control methods

used with 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 ;
c) installation with embedded trace heating – applications include:
– snow melting;
– frost heave protection;
– floor warming;
—————————

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

voltage and voltage spikes.
---------------------- Page: 10 ----------------------
62395-1  IEC:2006 – 13 –
– energy storage systems;
– door frames;

d) installations with trace heating inside conduit or 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 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 60050-841:2004, International Electrotechnical Vocabulary (IEV) – Part 841: Industrial

electroheat

IEC 60068-2-9, Environmental testing – Part 2: Tests – Guidance for solar radiation testing

IEC 60519-1:2003, Safety in electroheat installations – Part 1: General requirements

IEC 60519-10:2005, Safety in electroheat installations – Part 10: Particular requirements for

electrical resistance trace heating systems for industrial and commercial applications

3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60050-841 and in

IEC 60519-10, some of which are repeated here, as well as the following, apply.
3.1
ambient temperature
average temperature of air or another medium in the vicinity of the equipment

NOTE Where electrical trace heaters are enclosed in thermal insulation, the ambient temperature is the

temperature exterior to such thermal insulation.
[IEV 826-10-03, modified]
3.2
branch circuit

that portion of the wiring installation between the overcurrent device protecting the circuit and

the trace heater(s)
3.3 connections (terminations)
3.3.1
cold lead (for trace heater)

electrically insulated conductor or conductors used to connect a trace heater to the branch

circuit and designed so that it does not produce significant heat
---------------------- Page: 11 ----------------------
62395-1  IEC:2006 – 15 –
3.3.2
end termination

termination, which may be heat producing, applied to a trace heater at the end opposite that

where the power is supplied
3.3.3
integral components

factory-fabricated or field-assembled electrical terminations and connections, such as heat

shrink terminations, moulded end seals or splices, which conform to the general shape of the

trace heater and are exposed to the same environments as the trace heater
3.3.4
power termination
termination applied to the end of a trace heater at which the power is supplied
3.3.5
tee

electrical connection of trace heaters, in series or in parallel, to accommodate a branch in the

circuit and resembling the shape of a capital T
3.4
dead leg

segment of process piping segregated from the normal flow pattern for the purpose of

providing a heat-loss reference
3.5
design loading

minimum power that will meet the design requirements, in the worst conditions, after voltage

and resistance tolerances and appropriate safety factors have been considered
3.6
factory-fabricated unit or set

trace heater unit or set, including the necessary terminations and connections, assembled by

the manufacturer
3.7
field-assembled unit or set

trace heaters supplied in bulk with terminating components to be assembled at the work site

3.8
heat loss
energy flow from a pipe, vessel or equipment to its surroundings
3.9
heat sink
part that conducts and dissipates heat away from a workpiece

NOTE Typical heat sinks are pipe shoes, pipe supports and items of large mass such as valve actuators or pump

bodies.
3.10
heat transfer aids

thermally conductive materials, such as metallic foils or heat transfer compounds used to

increase the heat-transfer efficiency from trace heaters to the workpiece
---------------------- Page: 12 ----------------------
62395-1  IEC:2006 – 17 –
3.11
heater pad

trace heater comprising series or parallel connected elements having sufficient flexibility to

conform to the shape of the surface to be heated
3.12
heater panel

non-flexible trace heater comprising series or parallel connected elements fabricated to

conform to the general shape of the surface to be heated
3.13
high limit temperature

maximum allowable temperature of the system, including piping, fluid and trace heating

system
3.14
maximum ambient temperature

highest ambient temperature at which the trace heater is operable and should perform

according to specified requirements
3.15
maximum withstand temperature

maximum operating or exposure temperature that does not adversely affect the thermal

stability of the trace heater and its component parts
3.16
metallic covering

metallic sheath, braid, screen or equivalent electrically conductive covering used to provide

an electrical path to operate an electrical protection device and may also provide additional

physical protection for a trace heater
3.17
minimum ambient temperature

lowest ambient temperature specified at which the trace heater is operable and performs

according to specified requirements

NOTE Heat-loss calculations in IEC/TS 62395-2 are based on the minimum ambient temperature.

3.18
operating voltage
actual voltage applied to the trace heater when in service
3.19
overjacket

continuous layer of material applied outside the metallic sheath, screen or armouring to

protect against corrosion
3.20
parallel trace heater(s)

heating elements electrically connected in parallel, with the heating element either continuous

or in discrete units or zones, such that the watt density per unit length is not significantly

changed with any change in circuit length
3.21
power density (linear or surface)

power output in watts per linear metre for trace heater cables and cable units, and in watts

per square metre for trace heater pads and panels and trace heater pad and panel units

---------------------- Page: 13 ----------------------
62395-1  IEC:2006 – 19 –
3.22
rated output

total power or power per unit length or unit surface area of the trace heater, at rated voltage,

temperature, length or area which is normally expressed in watts, watts per metre or watts per

square metre
3.23
rated voltage

voltage to which operating and performance characteristics of trace heaters are referred

3.24
routine test

test to which each individual device is subjected during or after manufacture to ascertain

whether it complies with certain criteria
[IEV 151-16-17]
3.25
series trace heater(s)

heating elements electrically connected in series with a single current path and with a specific

resistance at a given temperature for a given length
3.26
sheath

uniform and continuous metallic or non-metallic outer covering enclosing the trace heater,

used to provide protection for the cable against influence from the surroundings (corrosion,

moisture, etc.)
NOTE See overjacket (3.19).
3.27
sheath temperature

temperature of the outermost continuous covering that may be exposed to the surrounding

atmosphere
3.28
stabilized design

concept where the temperature of the trace heater will, by design and use, stabilize below the

limiting temperature, under the most unfavourable conditions, without the need for a

protective system to limit the temperature
3.29
start-up current
current of a trace heater immediately upon energizing
3.30
system documentation

information typically provided by the supplier to allow satisfactory understanding, installation

and safe use of the trace heating system
3.31
temperature controller

device or combination of devices incorporating a means of sensing temperature and of

controlling the power supplied to the trace heater
---------------------- Page: 14 ----------------------
62395-1  IEC:2006 – 21 –
3.32
temperature sensor
temperature sensing element

device designed to respond to temperature providing an electrical signal or mechanical

operation
3.33
thermal insulation

material having air- or gas-filled pockets, void spaces, or heat-reflecting surfaces that, when

properly applied, retard the transfer of heat
3.34
trace heater

device designed for the purpose of producing heat on the principle of electrical resistance and

typically composed of one or more metallic conductors or an electrically conductive material,

suitably electrically insulated

NOTE This may typically be in the form of a trace heater cable, tape, heater panel or heater pad.

3.35
trace heater cable

cable constructed with one or more discrete or continuous electrically insulated heating

elements
3.36
trace heater unit
trace heater set

series trace heater cable, parallel trace heater cable, heater pad or heater panel suitably

terminated in conformity with the manufacturer’s instructions
3.37
trace heating

utilization of electric trace heater cables, pads, panels and support components, used to raise

or maintain temperatures
3.38
type test
conformity test made on one or more items representative of the production
[IEV 151-16-16]
3.39
weather barrier

material that, when installed on the outer surface of thermal insulation, protects the thermal

insulation from water or other liquids, from physical damage caused by sleet, wind or

mechanical abuse, and deterioration caused by solar radiation or atmospheric contamination

3.40
workpiece
object to which a trace heater is applied
---------------------- Page: 15 ----------------------
62395-1  IEC:2006 – 23 –
4 General requirements
4.1 General

Electrical resistance trace heating system within the scope of this standard shall be designed

and constructed so as to ensure electrical, thermal and mechanical durability and reliable

performance such that, in normal use, it poses no danger to the user or the surroundings.

Trace heaters may be supplied with additional mechanical protection to meet the

requirements of this standard if they are supplied as an integral assembly (prefabricated), and

that contain the following statement in the instructions: “This mechanical covering shall not be

removed and the trace heaters shall not be operated without the mechanical covering in

place.“.

All parts of a trace heating unit intended for use in contact with potable water shall be

constructed of materials that meet the relevant toxicity requirement.

The manufacturer shall declare the maximum withstand temperature in degrees Celsius. The

materials used in the trace heater shall withstand a temperature 20 K greater than its

maximum withstand temperature, when tested in accordance with 5.2.10.
4.2 Metallic braids or sheaths

Trace heaters shall be provided with an evenly distributed electrically conductive metallic

sheath, braid, screen or other equivalent electrically conductive covering. This sheath, braid,

screen or conductive material shall cover at leas
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.