Safety in electroheat installations - Part 6: Specifications for safety in industrial microwave heating equipment (IEC 60519-6:2011)

This part of IEC 60519 is applicable to equipment using microwave energy alone or in combination with other kinds of energy for industrial heating of materials. This part is applicable to industrial microwave heating equipment operating in the frequency range 300 MHz to 300 GHz. NOTE 1 Since the wavelength of the high end of the microwave band at 300 GHz is very short and particular leakage measurement instrumentation is needed in the low end of the band, the microwave leakage specification in Annex A applies only for the ISM frequencies between 800 MHz and 6 GHz. The centre frequencies of these are 2,45 GHz and 5,8 GHz universally, and between 896 MHz and 918 MHz in some regions. For such microwave equipment IEC 62311 applies. For other microwave frequencies, the basic restriction as addressed in informative Annex B or the ICNIRP Guidelines (see Bibliography) may be used. This part does not apply to appliances for household and similar use (covered by IEC 60335-2-25), commercial use (covered by IEC 60335-2-90) or laboratory use (covered by IEC 61010-2-010).

Lichtbogenschweißeinrichtungen - Teil 6: Schweißstromquellen mit begrenzter Einschaltdauer (IEC 60519-6:2011)

Sécurité dans les installations électrothermiques - Partie 6: Spécifications pour les installations de chauffage industriel à hyperfréquences (CEI 60519-6:2011)

La CEI 60519-6:2011 est applicable aux installations qui utilisent l'énergie à hyperfréquences, seule ou en combinaison avec d'autres formes d'énergie pour le chauffage industriel des matériaux. La présente partie est applicable aux installations électrothermiques industrielles fonctionnant dans la plage de fréquences comprises entre 300 MHz et 300 GHz. Cette troisième édition annule et remplace la deuxième édition parue en 2002, dont elle constitue une révision technique. Les modifications techniques significatives par rapport à l'édition précédente sont les suivantes: - la troisième édition de la CEI 60519-1:2003 a été prise en compte (la structure des articles a été adaptée à celle-ci dans la mesure du possible); - certaines définitions ont été modifiées ou alignées avec la CEI 60050-841:2004; - des articles concernant un fonctionnement anormal, les ouvertures d'accès, l'enceinte hyperfréquences et les barrages ont été ajoutés; - les mesures de la fuite d'hyperfréquences se trouvent dans une Annexe normative A; - une Annexe informative B concernant les justifications des limites d'exposition aux hyperfréquences et des fuites d'hyperfréquences a été ajoutée; - une bibliographie a été ajoutée.

Varnost pri električnih grelnih inštalacijah - 6. del: Specifikacije za varnost pri industrijski opremi za mikrovalovno ogrevanje (IEC 60519-6:2011)

Ta del IEC 60519 velja za opremo, ki uporablja samo mikrovalovno energijo ali v kombinaciji z drugimi vrstami energije za industrijsko ogrevanje materialov. Ta del velja za industrijsko opremo za mikrovalovno ogrevanje, ki deluje v frekvenčnem razponu od 300 MHz do 300 GHz. OPOMBA 1: Ker je valovna dolžina zgornjega konca mikrovalovnega pasu pri 300 GHz zelo kratka in je potrebna posebna merilna oprema za merjenje uhajanja v spodnjem koncu pasu, velja specifikacija za merjenje izpusta mikrovalov v dodatku A samo za frekvence ISM med 800 MHz in 6 GHz. Osrednje frekvence teh so 2,45 GHz in 5,8 GHz na splošno in v nekaterih regijah med 896 MHz in 918 MHz. Za tako mikrovalovno opremo velja IEC 62311. Za druge mikrovalovne frekvence se lahko uporabljajo osnovne omejitve, obravnavane v informativnem dodatku B ali v smernicah ICNIRP (glej bibliografijo). Ta del ne velja za aparate za gospodinjsko ali podobno uporabo (zajete v IEC 60335-2-25), gospodarsko uporabo (zajete v IEC 60335-2-90) ali laboratorijsko uporabo (zajete v 61010-2-010).

General Information

Status
Published
Publication Date
09-May-2011
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
26-Apr-2011
Due Date
01-Jul-2011
Completion Date
10-May-2011

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SLOVENSKI STANDARD
SIST EN 60519-6:2011
01-junij-2011
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SIST EN 60519-6:2003

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Safety in electroheat installations - Part 6: Specifications for safety in industrial

microwave heating equipment (IEC 60519-6:2011)
Lichtbogenschweißeinrichtungen - Teil 6: Schweißstromquellen mit begrenzter
Einschaltdauer (IEC 60519-6:2011)

Sécurité dans les installations électrothermiques - Partie 6: Spécifications pour les

installations de chauffage industriel à hyperfréquences (CEI 60519-6:2011)
Ta slovenski standard je istoveten z: EN 60519-6:2011
ICS:
25.180.10 (OHNWULþQHSHþL Electric furnaces
SIST EN 60519-6:2011 en

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

---------------------- Page: 1 ----------------------
SIST EN 60519-6:2011
---------------------- Page: 2 ----------------------
SIST EN 60519-6:2011
EUROPEAN STANDARD
EN 60519-6
NORME EUROPÉENNE
April 2011
EUROPÄISCHE NORM
ICS 25.180.10 Supersedes EN 60519-6:2002
English version
Safety in electroheat installations -
Part 6: Specifications for safety in industrial microwave heating
equipment
(IEC 60519-6:2011)
Sécurité dans les installations Lichtbogenschweißeinrichtungen -
électrothermiques - Teil 6: Schweißstromquellen mit
Partie 6: Spécifications pour les begrenzter Einschaltdauer
installations de chauffage industriel à (IEC 60519-6:2011)
hyperfréquences
(CEI 60519-6:2011)

This European Standard was approved by CENELEC on 2011-03-03. 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, Croatia, 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
Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2011 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60519-6:2011 E
---------------------- Page: 3 ----------------------
SIST EN 60519-6:2011
EN 60519-6:2011 - 2 -
Foreword

The text of document 27/704/CDV, future edition 3 of IEC 60519-6, prepared by IEC TC 27, Industrial

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

EN 60519-6 on 2011-03-03.
This European Standard supersedes EN 60519-6:2002.
The significant changes with respect to EN 60519-6:2002 are as follows:

– the third edition of EN 60519-1:2003 has been taken into account (the structure of clauses was

adapted to it as far as practicable);
– some definitions are modified or brought into line with IEC 60050-841:2004;

– clauses on abnormal operation, access openings, microwave enclosure and barriers are added;

– the microwave leakage measurements are in a normative Annex A;

– an informative Annex B on the rationales for microwave exposure and leakage limits is added;

– Bibliography is added.

This part of EN 60519 is to be used in conjunction with EN 60519-1:2003. It is intended to specify

particular requirements for industrial microwave heating equipment. This Part 6 supplements or modifies

the corresponding clauses of EN 60519-1, so as to convert it into an EN standard. Where a particular

sub-clause of Part 1 is not mentioned in this Part 6, that sub-clause applies as far as is reasonable.

Where this standard states "addition", modification" or "replacement", the relevant text of Part 1 is to be

adapted accordingly.

NOTE Sub-clauses and notes which are additional to those in Part 2 are numbered starting from 101, additional

items and annexes are lettered aa, bb or AA, BB, etc.

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

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

rights.
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) 2011-12-03
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2014-03-03
Annex ZA has been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 60519-6:2011 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 60335-2-25 NOTE Harmonized as EN 60335-2-25.
IEC 60335-2-90 NOTE Harmonized as EN 60335-2-90.
IEC 61010-2-010 NOTE Harmonized as EN 61010-2-010.
IEC 62311:2007 NOTE Harmonized as EN 62311:2008 (modified)
__________
---------------------- Page: 4 ----------------------
SIST EN 60519-6:2011
- 3 - EN 60519-6:2011
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
IEC 60519-1 2003 Safety in electroheat installations - EN 60519-1 2003
Part 1: General requirements
IEC 61307 - Industrial microwave heating installations - EN 61307 -
Test methods for the determination of power
output
IEC 60417-DB Graphical symbols for use on equipment - -
EN 60519-1 is superseded by EN 60519-1:2011, which is based on IEC 60519-1:2010.
---------------------- Page: 5 ----------------------
SIST EN 60519-6:2011
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SIST EN 60519-6:2011
IEC 60519-6
Edition 3.0 2011-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Safety in electroheat installations –
Part 6: Specifications for safety in industrial microwave heating equipment
Sécurité dans les installations électrothermiques –
Partie 6: Spécifications pour les installations de chauffage industriel à
hyperfréquences
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX U
ICS 25.180.10 ISBN 978-2-88912-322-3
® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 60519-6:2011
– 2 – 60519-6 © IEC:2011
CONTENTS

FOREWORD ........................................................................................................................... 3

INTRODUCTION ..................................................................................................................... 5

1 Scope ............................................................................................................................... 6

2 Normative references ....................................................................................................... 6

3 Terms and definitions ....................................................................................................... 7

4 Classification of electroheat equipment according to voltage bands .................................. 9

5 Classification of electroheat equipment according to frequency bands .............................. 9

6 General requirements ....................................................................................................... 9

7 Isolation and switching ................................................................................................... 12

8 Connection to the supply network and internal connections ............................................ 12

9 Protection against electric shock .................................................................................... 12

10 Protection against overcurrent ........................................................................................ 12

11 Equipotential bonding ..................................................................................................... 12

12 Control circuits and control functions .............................................................................. 12

13 Protection against thermal influences ............................................................................. 13

14 Risk of fire and danger of explosion ................................................................................ 13

15 Marking, labelling and technical documentation .............................................................. 14

16 Information on inspection and commissioning, and instructions for utilization and

maintenance of electroheat installations ......................................................................... 16

Annex AA (normative) Measurement of microwave leakage ................................................ 18

Annex BB (informative) Rationales for the microwave access barrier and associated

leakage tests ........................................................................................................................ 22

Bibliography .......................................................................................................................... 28

Figure 1 – Examples of warning labels .................................................................................. 15

Figure A.1 – Large microwave access barrier for conveyorised microwave heating

equipment ............................................................................................................................. 19

Figure A.2 – Small microwave access barrier for conveyorised microwave heating

equipment ............................................................................................................................. 20

Figure A.3 – Vertical-only microwave access barriers for conveyorised microwave

heating equipment ................................................................................................................ 21

Table 1 – Dimensional requirements on microwave access barriers ...................................... 11

---------------------- Page: 8 ----------------------
SIST EN 60519-6:2011
60519-6 © IEC:2011 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY IN ELECTROHEAT INSTALLATIONS –
Part 6: Specifications for safety in industrial
microwave heating equipment
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 60519-6 has been prepared by IEC technical committee 27:

Industrial electroheating.

This third edition cancels and replaces the second edition published in 2002 and constitutes

a technical revision. The significant changes with respect to the previous edition are as

follows:

– the third edition of IEC 60519-1:2003 has been taken into account (the structure of

clauses was adapted to it as far as practicable);
– some definitions are modified or brought into line with IEC 60050-841:2004;

– clauses on abnormal operation, access openings, microwave enclosure and barriers are

added;
– the microwave leakage measurements are in a normative Annex A;

– an informative Annex B on the rationales for microwave exposure and leakage limits is

added;
– Bibliography is added.
---------------------- Page: 9 ----------------------
SIST EN 60519-6:2011
– 4 – 60519-6 © IEC:2011

This part of IEC 60519 is to be used in conjunction with IEC 60519-1:2003. It is intended to

specify particular requirements for industrial microwave heating equipment. This Part 6

supplements or modifies the corresponding clauses of IEC 60519-1, so as to convert it into an

IEC standard. Where a particular subclause of Part 1 is not mentioned in this Part 6, that

subclause applies as far as is reasonable. Where this standard states "addition", modification"

or "replacement", the relevant text of Part 1 is to be adapted accordingly.

NOTE Subclauses and notes which are additional to those in Part 2 are numbered starting from 101, additional

items and annexes are lettered aa, bb or AA, BB, etc.
The text of this standard is based on the following documents:
CDV Report on voting
27/704/CDV 27/752/RVC

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.

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

The list of all parts of the IEC 60519 series, under the general title Safety in electroheat

installations, 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.
---------------------- Page: 10 ----------------------
SIST EN 60519-6:2011
60519-6 © IEC:2011 – 5 –
INTRODUCTION

This edition of IEC 60519-6 contains updates and revisions of IEC 60519-6:2002, which was

used over several years. It specifies safety requirements for industrial microwave heating

equipment and installations specially designed for specific applications, unlike household,

commercial and laboratory microwave appliances. Criteria for discrimination between these

categories are dealt with in the scope.
---------------------- Page: 11 ----------------------
SIST EN 60519-6:2011
– 6 – 60519-6 © IEC:2011
SAFETY IN ELECTROHEAT INSTALLATIONS –
Part 6: Specifications for safety in industrial
microwave heating equipment
1 Scope

This part of IEC 60519 is applicable to equipment using microwave energy alone or in

combination with other kinds of energy for industrial heating of materials.

This part is applicable to industrial microwave heating equipment operating in the frequency

range 300 MHz to 300 GHz.

NOTE 1 Since the wavelength of the high end of the microwave band at 300 GHz is very short and particular

leakage measurement instrumentation is needed in the low end of the band, the microwave leakage specification in

Annex A applies only for the ISM frequencies between 800 MHz and 6 GHz. The centre frequencies of these are

2,45 GHz and 5,8 GHz universally, and between 896 MHz and 918 MHz in some regions. For such microwave

equipment IEC 62311 applies. For other microwave frequencies, the basic restriction as addressed in informative

Annex B or the ICNIRP Guidelines (see Bibliography) may be used.
This part does not apply to appliances for household and similar use (covered by

IEC 60335-2-25), commercial use (covered by IEC 60335-2-90) or laboratory use (covered by

IEC 61010-2-010).

NOTE 2 Since microwave tunnel ovens and also some other types of microwave equipment may be either for

commercial, laboratory or industrial use, the following criteria are suitable for determination of the classification as

industrial equipment:

– commercial equipment is typically designed and planned for series production of many identical units, whereas

industrial equipment is typically produced in small series or even as single units. The processed goods are

consumed or ready for final use at the end of the heating process.

– laboratory heating equipment is for preparing material in a laboratory environment, and the processed material

is immediately available for investigations or further processing. Regular production of large quantities of

material is not foreseen.

– with industrial equipment, the processed goods are not immediately accessible to the end user, and the goods

may additionally not be in a final state from the perspective of the end user.
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 – Part 841: Industrial

electroheat
IEC 60417, Graphical symbols for use on equipment

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

IEC 61307, Industrial microwave heating installations – Test methods for the determination of

power output
---------------------- Page: 12 ----------------------
SIST EN 60519-6:2011
60519-6 © IEC:2011 – 7 –
3 Terms and definitions

For the purposes of this document, the terms and definitions given in IEC 60519-1:2003 and

IEC 60050-841, as well as the following apply.
3.1
microwave generator

source used to produce electromagnetic energy in the frequency range from 300 MHz to

300 GHz
[IEC 60050-841:2004, 841-29-16]
3.2
microwave applicator
structure which applies the microwave energy to the load
[IEC 60050-841:2004, 841-29-11]
3.3
microwave cavity

space enclosed by inner metal walls and a door or an access opening and in which the load is

placed
[IEC 60050-841:2004, 841-29-19]
3.4
microwave load
objects introduced into the microwave applicator or microwave cavity
[IEC 60050-841:2004, 841-29-12, modified]
3.5
microwave heating equipment

assembly of electric and mechanical devices intended for the transfer of microwave energy to

the microwave load and comprising in general power supplies, microwave applicators or

cavities, interconnecting cables and waveguides, control circuitry, means for transporting the

microwave load, and ventilation equipment
[IEC 60050-841:2004, 841-29-06, modified]
3.6
microwave leakage

superficial power density of microwave radiation escaping from the microwave heating

equipment
3.7
microwave access barrier

physical barrier, which has the property of microwave transparency, limiting access to the

microwave enclosure, mounted outside the microwave enclosure and can only be removed

with the aid of tools

NOTE 1 The function of the microwave access barrier is to act solely as a mechanical barrier.

NOTE 2 Microwave access barriers may be fixed to the microwave heating equipment or not, and are in the latter

case a part of the installation.

NOTE 3 Devices such as an array of metal chains or hinged metal plates at entrance and exit ports intended to

reduce microwave leakage are not considered microwave access barriers.
---------------------- Page: 13 ----------------------
SIST EN 60519-6:2011
– 8 – 60519-6 © IEC:2011
3.8
microwave enclosure
structure which is intended to confine the microwave energy to a defined region
NOTE 1 Examples are a cavity, door seals and waveguides.

NOTE 2 Microwave access barriers mounted outside the microwave enclosure are not considered as a part of the

microwave enclosure.
[IEC 60050-841:2004, 841-29-20, modified]
3.9
means of access

all structural features of the microwave heating equipment which can be opened or removed

without the use of a tool to provide access to the interior of the microwave applicator or

microwave cavity
3.10
maintenance door

all structural features of any part of the microwave heating equipment which can be opened or

removed without the use of a tool to provide access to other locations than the microwave

applicator or microwave cavity
3.11
cover

structural feature of any part of the microwave heating equipment which can be opened or

removed by the use of a tool to provide access for routine maintenance, service, replacement

of expendable parts, etc.
3.12
entrance or exit port
openings in the microwave enclosure through which the microwave load moves
3.13
microwave transparency
property of a material having negligible absorption and reflection of microwaves

NOTE The relative permittivity of a microwave transparent material is usually less than 7 and the loss factor is

usually less than 0,015.
[IEC 60050-841:2004, 841-29-14]
3.14
interlock

mechanical or electrical safety device or system, the function of which is to prohibit one class

of events if another class of condition does not exist

NOTE For example, a microwave interlock prohibits the operation of a microwave generator, if the means of

access are not closed.
3.15
microwave output power
microwave power as defined and measured according to IEC 61307
3.16
normal load

nominal microwave load at full microwave output power as specified by the manufacturer’s

documentation
---------------------- Page: 14 ----------------------
SIST EN 60519-6:2011
60519-6 © IEC:2011 – 9 –
3.17
normal operation

range of microwave output power and normal loads in allowable working conditions of the

microwave heating equipment, as agreed between the manufacturer and user
3.18
reference surface

fictitious surface in the vicinity of mainly entrance and exit ports, located as a consequence of

microwave leakage measurements

NOTE 1 If the microwave leakage reading without microwave access barrier is less or equal to the limits of

Annex A, the reference surface is the surface of the geometric opening of the microwave enclosure.

NOTE 2 See 6.3 and Figures A.1, A.2 and A.3 for further explanations.
4 Classification of electroheat equipment according to voltage bands
Clause 4 of IEC 60519-1:2003 applies.
5 Classification of electroheat equipment according to frequency bands
Clause 5 of IEC 60519-1:2003 applies.
6 General requirements
Clause 6 of IEC 60519-1:2003 applies except as follows.
6.1 Electroheating equipment
Additional subclause:
6.1.101 Abnormal operation

Any single electrical or mechanical fault in the microwave heating equipment shall not result

in energising of a microwave generator under normal operation.

NOTE 1 A mechanical fault in an array of metal chains or hinged metal plates at entrance and exit ports intended

to reduce microwave leakage, is a single fault condition.

NOTE 2 Compliance with this requirement may be checked by inspection of the circuit diagrams and/or with the

microwave leakage measurement as specified in Annex A.

For the purpose of testing, all maintenance doors, means of access and microwave access

barriers are removed or opened, except those which incorporate microwave interlocks which

prohibit generation of microwave power when removed or open. Attempts of normal operation

are then made and shall not result in microwave leakage exceeding the limit in Annex A.

Operation of microwave heating equipment for continuous processing under conditions of

interruption of the flow of microwave load(s) shall not result in a temporary microwave

leakage exceeding the limit specified in Annex A, but with a limit of 100 W/m .

Attempts to operate the microwave heating equipment without microwave load shall not result

in microwave leakage exceeding the limit specified in Annex A, but with a limit of 100 W/m .

NOTE 3 Compliance with this requirement can be checked by detecting microwave emission by an active

microwave leakage monitor which switches off the microwave generator in order for the requirements of Annex A to

be fulfilled. Defeating the sensor circuit is considered a single fault condition, as is interruption of the flow of

microwave load(s).
---------------------- Page: 15 ----------------------
SIST EN 60519-6:2011
– 10 – 60519-6 © IEC:2011
6.3 Static charges – stray fields – electric and/or magnetic fields
Additional subclauses:
6.3.101 Microwave leakage

Compliance for microwave leakage with the safety requirements is checked by measurements

according to Annex A.
6.3.102 Protection against microwave leakage

Microwave heating equipment shall be designed, constructed and operated as to provide

adequate protection against radiation hazards due to microwave leakage.

The microwave heating equipment shall be provided with a device giving adequate indication

when the microwave power is switched on and which is clearly visible to anyone entering the

general area of the installation.

Where the microwave power can be or is varied by a user control, an indicator shall show the

operator the level of microwave power applied.

There shall be a key switch, code panel, card reader or similar device on the control panel

requiring the insertion of a key, input of a code or card or similar before microwave power can

be generated.
6.3.103 Protection against access to microwave containing regions

Microwave heating equipment including microwave access barriers installed in order to limit

access of personnel to a distance from the microwave enclosure are either enclosing the

entrance or exit port and mounted on the microwave heating equipment, or not a part of it but

of the installation and may then be essentially only vertical. Both types shall comply with the

following:

• the microwave access barrier shall not be constructed of metal or microwave-absorbing

material in such a way that it can guide or absorb microwaves;

• dimensions of the accessible opening of the microwave access barrier as such shall not

be larger than the openings of the microwave enclosure which they protect, with a

maximum of 65 mm × 65 mm; the requirement of maximum dimensions 65 mm × 65 mm is
not applicable for any openings in microwave access ba
...

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