Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-012: Particular requirements for climatic and environmental testing and other temperature conditioning equipment (IEC 61010-2-012:2016)

This group safety publication is primarily intended to be used as a product safety standard for
the products mentioned in the scope, but shall also be used by technical committees in the
preparation of their publications for products similar to those mentioned in the scope of this
standard, in accordance with the principles laid down in IEC Guide 104 and lSO/lEC Guide 51.
This Part 2 of IEC 61010 specifies safety requirements for electrical equipment and their
accessories within the categories a) through c), wherever they are intended to be used,
whenever that equipment incorporates one or more of the following characteristics:
– A REFRIGERATING SYSTEM that is acted on or impacted by an integral heating function such
that the combined heating and cooling system generates additional and/or more severe
HAZARDS than those for the two systems if treated separately.
– The materials being treated in the intended application introduce significant heat into the
REFRIGERATING SYSTEM that the cooling system in the application yield additional and/or
more severe HAZARDS than those for the cooling system if operated at the maximum RATED
ambient alone.
– An irradiation function for the materials being treated presenting additional HAZARDS.
– A function to expose the materials being treated to excessive humidity, carbon dioxide,
salt mist, or other substances which may result in additional HAZARDS.
– A function of MECHANICAL MOVEMENT presenting additional HAZARDS.
– Provision for an OPERATOR to walk-in to the operating area to load or unload the materials
being treated.

Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2-012: Besondere Anforderungen an Klima- und Umwelttestgeräte und andere Temperatur-Konditionierungsgeräte (IEC 61010-2-012:2016)

Règles de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-012: Exigences particulières pour appareils d'essais climatiques et d'environnement, et autres appareils de conditionnement de température

L'IEC 61010-2-012:2016 spécifie les exigences de sécurité pour les appareils électriques et leurs accessoires relevant des catégories a) à c) quelle que soit l'utilisation à laquelle ils sont destinés, lorsque ces appareils comprennent une ou plusieurs des caractéristiques suivantes: - Un SYSTEME FRIGORIFIQUE affecté ou influencé par une fonction de chauffage intégrée de sorte que le système de chauffage et de refroidissement combiné engendre des DANGERS supplémentaires et/ou plus graves que ceux pour les deux systèmes s'ils sont traités séparément. - Les matières traitées dans l'application prévue génèrent une chaleur importante dans le SYSTEME FRIGORIFIQUE, de sorte que le système de refroidissement dans l'application engendre des DANGERS supplémentaires et/ou plus graves que ceux pour le système de refroidissement dans le cas où il est utilisé seul à la température ambiante ASSIGNEE maximale. - Une fonction d'exposition aux rayonnements pour les matières traitées qui présentent des DANGERS supplémentaires. - Une fonction dédiée à l'exposition des matières traitées à une humidité excessive, au dioxyde de carbone, au brouillard salin ou à d'autres substances qui peuvent engendrer des DANGERS supplémentaires. - Une fonction de MOUVEMENT MECANIQUE qui présente des DANGERS supplémentaires. - Un dispositif qui permet le déplacement de l'OPERATEUR vers la zone de manoeuvre afin de charger ou décharger les matières traitées. Elle a le statut d'une publication groupée de sécurité conformément au Guide IEC 104. Cette publication doit être lue conjointement avec la IEC 61010-1:2010

Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko uporabo - 2-012. del: Posebne zahteve za opremo za klimatska in okoljska preskušanja ter drugo opremo za uravnavanje temperature (IEC 61010-2-012:2016)

Ta publikacija skupinske varnosti se uporablja predvsem kot standard o varnosti izdelka za izdelke, ki so omenjeni v okviru publikacije, vendar je namenjena tudi tehničnim odborom pri pripravi publikacij za izdelke, ki so podobni izdelkom, omenjenim v okviru tega standarda, skladno z načeli vodil IEC 104 in ISO/IEC 51
2. del standarda IEC 61010 določa varnostne zahteve za električno opremo in njene dodatke v kategorijah od a) do c), kadar so namenjeni uporabi z opremo z eno ali več spodaj navedenimi lastnostmi:
– HLADILNIM SISTEMOM, ki ga upravlja ali nanj vpliva vgrajena grelna funkcija tako, da skupni grelno-hladilni sistem ustvarja dodatne in/ali večje NEVARNOSTI, kot če bi bila sistema neodvisna;
– materiali, ki se obdelujejo pri namenski uporabi, vpeljejo znatno količino toplote v HLADILNI SISTEM, tako da hladilni sistem pri taki uporabi ustvarja dodatne in/ali večje NEVARNOSTI, kot če bi deloval le pri največji NAZIVNI temperaturi;
– funkcijo obsevanja obdelovanih materialov, ki predstavlja dodatne NEVARNOSTI;
– funkcijo, ki obdelovane materiale izpostavlja prekomerni vlažnosti, ogljikovemu dioksidu,
slani megli ali drugim snovem, ki lahko povzročijo dodatne NEVARNOSTI;
– funkcijo MEHANSKEGA GIBANJA, ki predstavlja dodatne NEVARNOSTI;
– določbo, ki UPRAVLJAVCU dovoljuje, da vstopi na območje delovanja, da naloži ali razloži obdelovane materiale.

General Information

Status
Published
Publication Date
15-May-2017
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
16-Nov-2016
Due Date
21-Jan-2017
Completion Date
16-May-2017

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SLOVENSKI STANDARD
SIST EN 61010-2-012:2017
01-junij-2017
9DUQRVWQH]DKWHYH]DHOHNWULþQRRSUHPR]DPHULWYHQDG]RULQODERUDWRULMVNR
XSRUDERGHO3RVHEQH]DKWHYH]DRSUHPR]DNOLPDWVNDLQRNROMVND
SUHVNXãDQMDWHUGUXJRRSUHPR]DXUDYQDYDQMHWHPSHUDWXUH ,(&

Safety requirements for electrical equipment for measurement, control, and laboratory

use - Part 2-012: Particular requirements for climatic and environmental testing and other

temperature conditioning equipment (IEC 61010-2-012:2016)

Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2

-012: Besondere Anforderungen an Klima- und Umwelttestgeräte und andere
Temperatur-Konditionierungsgeräte (IEC 61010-2-012:2016)
Règles de sécurité pour appareils électriques de mesurage, de régulation et de

laboratoire - Partie 2-012: Exigences particulières pour appareils d'essais climatiques et

d'environnement, et autres appareils de conditionnement de température
Ta slovenski standard je istoveten z: EN 61010-2-012:2016
ICS:
19.040 Preskušanje v zvezi z Environmental testing
okoljem
19.080 (OHNWULþQRLQHOHNWURQVNR Electrical and electronic
SUHVNXãDQMH testing
71.040.10 Kemijski laboratoriji. Chemical laboratories.
Laboratorijska oprema Laboratory equipment
SIST EN 61010-2-012:2017 en,fr,de

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

---------------------- Page: 1 ----------------------
SIST EN 61010-2-012:2017
---------------------- Page: 2 ----------------------
SIST EN 61010-2-012:2017
EUROPEAN STANDARD EN 61010-2-012
NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2016
ICS 19.080
English Version
Safety requirements for electrical equipment for measurement,
control and laboratory use - Part 2-012: Particular requirements
for climatic and environmental testing and other temperature
conditioning equipment
(IEC 61010-2-012:2016)

Règles de sécurité pour appareils électriques de mesurage, Sicherheitsbestimmungen für elektrische Mess-, Steuer-,

de régulation et de laboratoire - Partie 2-012: Exigences Regel- und Laborgeräte - Teil 2-012: Besondere

particulières pour les appareils d'essais climatiques et Anforderungen an Klima- und Umwelttestgeräte und andere

d'environnement, et autres appareils de conditionnement de Temperatur-Konditionierungsgeräte

température (IEC 61010-2-012:2016)
(IEC 61010-2-012:2016)

This European Standard was approved by CENELEC on 2016-08-16. 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.
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

© 2016 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 61010-2-012:2016 E
---------------------- Page: 3 ----------------------
SIST EN 61010-2-012:2017
EN 61010-2-012:2016
European foreword

The text of document 66/590/FDIS, future edition 1 of IEC 61010-2-012, prepared by IEC/TC 66 "Safety of

measuring, control and laboratory equipment" was submitted to the IEC-CENELEC parallel vote and

approved by CENELEC as EN 61010-2-012:2016.
The following dates are fixed:
(dop) 2017-05-16
• 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) 2019-08-19
standards conflicting with the
document have to be withdrawn

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.

Endorsement notice

The text of the International Standard IEC 61010-2-012:2016 was approved by CENELEC as a European

Standard without any modification.
The Bibliography of EN 61010-1:2010 is applicable except as follows:

In the bibliography of EN 61010-1:2010, the following notes have to be added for the standards indicated:

IEC 60068-1:1988+A1:1992 NOTE Harmonized as EN 60068-1:1994 (not modified).
IEC 60068-2-1:2007 NOTE Harmonized as EN 60068-2-1:2007 (not modified).
IEC 60068-2-2:2007 NOTE Harmonized as EN 60068-2-2:2007 (not modified).
IEC 60068-2-5:2010 NOTE Harmonized as EN 60068-2-5:2011 (not modified).
IEC 60068-2-10:2005 NOTE Harmonized as EN 60068-2-10:2005 (not modified).
IEC 60068-2-11:1981 NOTE Harmonized as EN 60068-2-11:1999 (not modified).
IEC 60068-2-13:1983 NOTE Harmonized as EN 60068-2-13:1999 (not modified).
IEC 60068-2-14:2009 NOTE Harmonized as EN 60068-2-14:2009 (not modified).
IEC 60068-2-30:2005 NOTE Harmonized as EN 60068-2-30:2005 (not modified).
IEC 60068-2-38:2009 NOTE Harmonized as EN 60068-2-38:2009 (not modified).
IEC 60068-2-39:1976 NOTE Harmonized as EN 60068-2-39:1999 (not modified).

IEC 60068-2-40:1976+A1:1983 NOTE Harmonized as EN 60068-2-40:1999 (not modified).

IEC 60068-2-41:1976+A1:1983 NOTE Harmonized as EN 60068-2-41:1999 (not modified).

IEC 60068-2-53:2010 NOTE Harmonized as EN 60068-2-53:2010 (not modified).
IEC 60068-2-66:1994 NOTE Harmonized as EN 60068-2-66:1994 (not modified).
IEC 60068-2-67:1995 NOTE Harmonized as EN 60068-2-67:1996 (not modified).
IEC 60068-2-78:2001 NOTE Harmonized as EN 60068-2-78:2001 (not modified).
IEC 60068-3-5 NOTE Harmonized as EN 60068-3-5.
IEC 60335-2-41 NOTE Harmonized as EN 60335-2-41.
Superseded by EN 60068-1:2014 (IEC 60068-1:2013).
Superseded by EN 60068-2-39:2016 (IEC 60068-2-39:2015).
Superseded by EN 60068-2-78:2013 (IEC 60068-2-78:2012).
---------------------- Page: 4 ----------------------
SIST EN 61010-2-012:2017
EN 61010-2-012:2016
IEC 60335-2-73:2002 NOTE Harmonized as EN 60335-2-73:2003 (modified).

IEC 60335-2-73:2002/A1:2006 NOTE Harmonized as EN 60335-2-73:2003/A1:2006 (not modified).

IEC 60335-2-74:2002 NOTE Harmonized as EN 60335-2-74:2003 (not modified).

IEC 60335-2-74:2002/A1:2006 NOTE Harmonized as EN 60335-2-74:2003/A1:2006 (not modified).

IEC 60335-2-89 NOTE Harmonized as EN 60335-2-89.
IEC 60335-2-98:2002 NOTE Harmonized as EN 60335-2-98:2003 (not modified).

IEC 60335-2-98:2002/A1:2004 NOTE Harmonized as EN 60335-2-98:2003/A1:2005 (not modified).

IEC 61010-2-010 NOTE Harmonized as EN 61010-2-010.
IEC 61770:2008 NOTE Harmonized as EN 61770:2009 (not modified).
ISO 4126-1 NOTE Harmonized as EN ISO 4126-1.
ISO 9227 NOTE Harmonized as EN ISO 9227.
---------------------- Page: 5 ----------------------
SIST EN 61010-2-012:2017
EN 61010-2-012:2016
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 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.

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

Annex ZA of EN 61010-1:2010 is applicable, except as follows:
Publication Year Title EN/HD Year
Additions:
IEC 60079-15 2010 Explosive atmospheres - EN 60079-15 2010
Part 15: Equipment protection by type of
protection "n"
IEC 60079-20-1 - Explosive atmospheres - EN 60079-20-1 -
Part 20-1: Material characteristics for gas and
vapour classification - Test methods and data

IEC 60335-2-24 2010 Household and similar electrical appliances - EN 60335-2-24 2010

Safety -
Part 2-24: Particular requirements for
refrigerating appliances, ice-cream appliances
and ice makers
+A1 (mod) 2012 +A1 2016

IEC 60335-2-34 2012 Household and similar electrical appliances - EN 60335-2-34 2013

Safety -
Part 2-34: Particular requirements for motor-
compressors
+A1 2015 +A1 2015
IEC 62471 - Photobiological safety of lamps and lamp EN 62471 -
systems
IEC/TR 62471-2 - Photobiological safety of lamps and lamp - -
systems -
Part 2: Guidance on manufacturing
requirements relating to non-laser optical
radiation safety
ISO 7010 2011 Graphical symbols - Safety colours EN ISO 7010 2012
and safety signs - Registered safety signs
---------------------- Page: 6 ----------------------
SIST EN 61010-2-012:2017
IEC 61010-2-012
Edition 1.0 2016-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
GROUP SAFETY PUBLICATION
PUBLICATION GROUPÉE DE SÉCURITÉ
Safety requirements for electrical equipment for measurement, control and
laboratory use –
Part 2-012: Particular requirements for climatic and environmental testing and
other temperature conditioning equipment
Règles de sécurité pour appareils électriques de mesurage, de régulation et
de laboratoire –
Partie 2-012: Exigences particulières pour les appareils d'essais climatiques et
d'environnement, et autres appareils de conditionnement de température
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.080 ISBN 978-2-8322-3504-1

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

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

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 61010-2-012:2017
– 2 – IEC 61010-2-012:2016 © IEC 2016
CONTENTS

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

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

1 Scope and object ........................................................................................................... 9

2 Normative references................................................................................................... 10

3 Terms and definitions .................................................................................................. 10

4 Tests ........................................................................................................................... 16

5 Marking and documentation ......................................................................................... 22

6 Protection against electric shock .................................................................................. 32

7 Protection against mechanical HAZARDS ........................................................................ 33

8 Resistance to mechanical stresses ............................................................................... 35

9 Protection against the spread of fire ............................................................................. 36

10 Equipment temperature limits and resistance to heat .................................................... 37

11 Protection against HAZARDS from fluids ......................................................................... 41

12 Protection against radiation, including laser sources, and against sonic and

ultrasonic pressure ...................................................................................................... 56

13 Protection against liberated gases and substances, explosion and implosion ................ 57

14 Components and subassemblies .................................................................................. 59

15 Protection by interlocks ................................................................................................ 61

16 HAZARDS resulting from application............................................................................... 63

17 RISK assessment ......................................................................................................... 64

Annex ................................................................................................................................. 65

Annex K (normative) Insulation requirements not covered by 6.7 ........................................ 65

Annex L (informative) Index of defined terms ...................................................................... 66

Annex AA (informative) Useful symbols .............................................................................. 68

Annex BB (informative) Protection for people who are inside WALK-IN EQUIPMENT ................. 71

Annex CC (informative) Safety requirements for components and piping ............................. 73

Annex DD (informative) Equipment containing FLAMMABLE REFRIGERANTS information

and marking requirements ................................................................................................... 79

Annex EE (normative) Non-sparking “n” electrical device .................................................... 82

Bibliography ....................................................................................................................... 83

Figure 101 – Schema of a REFRIGERATING SYSTEM incorporating a CONDENSER ........................ 7

Figure 102 – Flow chart illustrating the selection process ...................................................... 8

Figure 103 –Scratching TOOL tip details ............................................................................... 51

Table 1 – Symbols .............................................................................................................. 25

Table 101 – Time-temperature conditions ............................................................................ 29

Table 102 – Maximum temperatures for MOTOR-COMPRESSORS ............................................. 39

Table 103 – Minimum temperature for determination of SATURATED-VAPOUR PRESSURE

of REFRIGERANT ................................................................................................................... 46

Table 104 – REFRIGERANT flammability parameters .............................................................. 54

Table 105 – Lamp or lamp systems considered photobiologically safe .................................. 57

---------------------- Page: 8 ----------------------
SIST EN 61010-2-012:2017
IEC 61010-2-012:2016 © IEC 2016 – 3 –
Table 106 – Lamp or lamp systems considered photobiologically safe under certain

conditions ........................................................................................................................... 57

Table AA.1 – Useful symbols .............................................................................................. 68

Table CC.1 – Parameters of pressure vessels according to EN 14276-1 ............................... 74

Table CC.2 – Parameters of piping according to EN 14276-2 ............................................... 75

Table CC.3 – Components and piping requirements ............................................................ 76

Table CC.4 – Minimum wall thickness for copper and steel tubing ........................................ 78

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SIST EN 61010-2-012:2017
– 4 – IEC 61010-2-012:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT FOR
MEASUREMENT, CONTROL AND LABORATORY USE –
Part 2-012: Particular requirements for climatic and environmental testing
and other temperature conditioning 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 61010-2-012 has been prepared by IEC technical committee 66:

Safety of measuring, control and laboratory equipment.

It has the status of a group safety publication in accordance with IEC Guide 104.

The text of this standard is based on the following documents:
FDIS Report on voting
66/590/FDIS 66/599/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: 10 ----------------------
SIST EN 61010-2-012:2017
IEC 61010-2-012:2016 © IEC 2016 – 5 –

A list of all parts of the IEC 61010 series, under the general title, Safety requirements for

electrical equipment for measurement, control, and laboratory use, may be found on the IEC

website.

IEC 61010-2-012 is to be used in conjunction with the latest edition of IEC 61010-1. It was

established on the basis of the third edition (2010) of IEC 61010-1

This Part 2-012 .supplements or modifies the corresponding clauses in IEC 61010-1 so as to

convert that publication into the IEC standard: Particular requirements for climatic and

environmental testing and other temperature conditioning equipment.

Where a particular subclause of Part 1 is not mentioned in this Part 2, that subclause applies

as far as is reasonable. where this part states “addition”, “modification”, “replacement”, or

“deletion”, the relevant requirement, test specification, or note in Part 1 should be adapted

accordingly.
In this standard:
1) the following print types are used:
– requirements and definitions: in roman type;
– NOTES: in smaller roman type;
– conformity and tests: in italic type;
– terms used throughout this standard which have been defined in Clause 3: SMALL
ROMAN CAPITALS.

2) subclauses, figures, tables and notes which are additional to those in Part 1 are numbered

starting from 101. Additional annexes are lettered starting from AA.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC website under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.

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 61010-2-012:2017
– 6 – IEC 61010-2-012:2016 © IEC 2016
INTRODUCTION

This standard, in conjunction with Part 2-010 and Part 2-011, addresses the specific HAZARDS

associated with the heating and cooling of materials by equipment and are segregated as

follows:

specifically addresses the HAZARDS associated with equipment incorporating heating

IEC 61010-2-010
systems.

specifically addresses the HAZARDS associated with equipment incorporating REFRIGERATING

IEC 61010-2-011
SYSTEMS.

specifically addresses the HAZARDS associated with equipment incorporating both heating

and REFRIGERATING SYSTEMS that interact with each other such that the combined heating

IEC 61010-2-012 and cooling system yield additional or more severe HAZARDS for the two systems than if

treated separately. It also addresses the HAZARDS associated with the treatment of materials

by other factors like irradiation, excessive humidity, CO and MECHANICAL MOVEMENT etc.

Guidance for the application of the appropriate Part 2 standard(s)

When the equipment includes only a material heating system, and no REFRIGERATING SYSTEM

or other environmental factors apply, then Part 2-010 applies without needing Part 2-011 or

Part 2-012. Similarly, when the equipment includes only a REFRIGERATING SYSTEM, and no

material heating system or other environmental factors apply, then Part 2-011 applies without

needing Part 2-010 or Part 2-012. However, when the equipment incorporates both a material

heating system, and a REFRIGERATING SYSTEM or the materials being treated in the intended

application introduce significant heat into the REFRIGERATING SYSTEM, a determination should

be made whether the interaction between the two systems will generate additional or more

severe HAZARDS than if the systems were evaluated separately (application temperature, see

flow chart for selection process). If the interaction of the heating and cooling functions yields

no additional or more severe HAZARDS then both Part 2-010 and Part 2-011 apply for their

respective functions. Conversely, if additional or more severe HAZARDS result from the

combining of the heating and cooling function, or the equipment incorporates additional

material treatment factors then Part 2-012 applies but not Part 2-010 or Part 2-011.

What HAZARDS are applicable for a REFRIGERATING SYSTEM?

The typical HAZARDS for a REFRIGERATING SYSTEM (see Figure 101) consisting of a MOTOR-

COMPRESSOR, a CONDENSER, an expansion device and an EVAPORATOR include but are not

limited to:

– The maximum temperature of LOW-PRESSURE SIDE (return temperature) to the MOTOR-

COMPRESSOR. A MOTOR-COMPRESSOR incorporates a REFRIGERANT cooled motor and it

should be established that the maximum temperatures of LOW-PRESSURE SIDE under least

favourable condition do not exceed the insulation RATINGS within the motor.

– The maximum pressure of LOW-PRESSURE SIDE at the inlet to the MOTOR-COMPRESSOR. The

housing of the MOTOR-COMPRESSOR is exposed to this pressure and so the design RATING

of the MOTOR-COMPRESSOR housing should accommodate the worst case pressures whilst

providing the correct safety margin for a pressure vessel.

– The maximum temperature of HIGH-PRESSURE SIDE to the CONDENSER. The temperatures of

HIGH-PRESSURE SIDE under most unfavourable conditions may present a temperature
HAZARD if the OPERATOR is exposed to or electrical insulation is degraded.

– The maximum pressure of HIGH-PRESSURE SIDE at the outlet to the MOTOR-COMPRESSOR.

The REFRIGERANT components downstream of the MOTOR-COMPRESSOR up to the expansion

device are exposed to this pressure and so the design RATING of these components should

accommodate the worst case pressures whilst providing the appropriate safety margin for

a pressure vessel.

– The maximum application temperatures, namely, the SOAKED TEMPERATURE CONDITIONS,

where the heat is being extracted from, may impact the maximum temperature of LOW-

PRESSURE SIDE to the MOTOR-COMPRESSOR as well as present a temperature HAZARD if the

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SIST EN 61010-2-012:2017
IEC 61010-2-012:2016 © IEC 2016 – 7 –

OPERATOR is exposed to or electrical insulation is degraded. Whether this application

temperature is derived from an integral heating function of the device or from the heat

dissipated from the material being cooled the impact under worst case conditions should

be evaluated.

– The current draw of the equipment should be established when including the worst case

running conditions of the REFRIGERATING SYSTEM including any defrost cycles that may

apply.

The worst case conditions should be determined for the equipment and will include both the

least favourable NORMAL USE conditions as well as the most unfavourable testing results under

SINGLE FAULT CONDITIONS.
Maximum temperature
and pressure at
HIGH-PRESSURE SIDE
CONDENSER
MOTOR-
Expansion
COMPRESSOR
device
EVAPORATOR
Application
under SOAKED
Maximum temperature TEMPERATURE
and pressure at CONDITIONS
LOW-PRESSURE SIDE
IEC
Figure 101 – Schema of a REFRIGERATING SYSTEM incorporating a CONDENSER
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SIST EN 61010-2-012:2017
– 8 – IEC 61010-2-012:2016 © IEC 2016

The selection process is illustrated in the following flow chart (see Figure 102).

Which Part 2 standard applies for equipment
under the scope of IEC 61010 that incorporates
heating and/or cooling?
Additional material treatment factors may
include irradiation, excessive humidity, CO ,
salt mist and chemicals etc.
Does the equipment
YES NO
Part 2-012 applies
incorporate additional material
alone
treatment factors?
YES NO
Does the equipment include a
REFRIGERATING SYSTEM?
Part 2-010 applies
alone
YES NO
Does the equipment include Part 2-011 applies
the heating of materials? alone
The application temperature could
be derived from the resultant heat
of the material being treated or an
integral heating function
Does the application
YES NO
Part 2-012 applies Both Part 2-010 and
temperature adversely impact
alone Part 2-011 apply
the REFRIGERATING SYSTEM?
The equipment shall be evaluated The equipment may take
to ensure the HAZARDS from the measures to reliably mitigate the
application temperature have impact of the application
been mitigated temperature
IEC
Figure 102 – Flow chart illustrating the selection process
---------------------- Page: 14 ----------------------
SIST EN 61010-2-012:2017
IEC 61010-2-012:2016 © IEC 2016 – 9 –
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT FOR
MEASUREMENT, CONTROL AND LABORATORY USE –
Part 2-012: Particular requirements for climatic and environmental testing
and other temperature conditioning equipment
1 Scope and object
This clause of Part 1 is applicable except as follows:
1.1.1 Equipment included in scope
Repl
...

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