EN IEC 61010-2-011:2021

Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-011: Particular requirements for refrigerating equipment

IEC 61010-2-011:2019 is available as IEC 61010-2-011:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition. IEC 61010-2-011:2019 specifies particular safety requirements for the following types a) to c) of electrical equipment and their accessories, wherever they are intended to be used, whenever that equipment incorporates refrigerating systems as an integral part of, or separate from, the equipment and the equipment is in direct control of the refrigerating system. This document details all the requirements when up to 150 g of flammable refrigerant are used per stage of a refrigerating system. Additional requirements beyond the current scope of this document apply if a refrigerant charge of flammable refrigerant exceeds this amount. a) Electrical test and measurement equipment This is equipment which by electromagnetic means tests, measures, indicates or records one or more electrical or physical quantities, also non-measuring equipment such as signal generators, measurement standards, power supplies for laboratory use, transducers, transmitters, etc. b) Electrical industrial process-control equipment This is equipment which controls one or more output quantities to specific values, with each value determined by manual setting, by local or remote programming, or by one or more input variables. c) Electrical laboratory equipment This is equipment which measures, indicates, monitors, inspects or analyses materials, or is used to prepare materials, and includes in vitro diagnostic (IVD) equipment. This second edition cancels and replaces the first edition published in 2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) alignment with changes introduced by Amendment 1 of IEC 61010-1:2010; b) introduction of new defined terms or modified terms to align with Part 2-012 and other source documents. Editorial changes to use small capitals only for defined terms. Note the difference of defined term in 4.3.2.101 and abnormal operation in 11.7.104.3 and 11.7.104.5; c) clarifications for cooling tests in 4.4.2.10; d) changes pertaining to the accurate employment of the following terms: temperature, operating temperature, application temperature, controlled temperature, room ambient and ambient temperature; e) use of defined term to replace cooling system; f) move text of 4.4.2.101 to 4.3.2.101, since the purpose of as defined, is to simulate failure of the ambient conditions of 1.4.1 but not of the of the equipment; g) use of the term equipment to replace unit, apparatus, appliance, where applicable; h) in 5.1.2 dd) for high and low sides for each stage are required only under ; i) use of defined term to replace normal operation; j) use of defined term to replace user. It has the status of a group safety publication in accordance with IEC Guide 104.

Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2-011: Besondere Anforderungen für Kühlgeräte

Exigences de sécurité pour appareils électriques de mesurage, de régulation et de laboratoire - Partie 2-011: Exigences particulières pour appareils de réfrigération

IEC 61010-2-011:2019 est disponible sous forme de IEC 61010-2-011:2019 RLV qui contient la Norme internationale et sa version Redline, illustrant les modifications du contenu technique depuis l'édition précédente. L'IEC 61010-2-011:2019 spécifie les exigences de sécurité particulières pour les types a) à c) suivants d'appareils électriques et leurs accessoires, quel que soit l'endroit dans lequel ils sont destinés à être utilisés, lorsque ces appareils comportent des systèmes frigorifiques, que ces derniers fassent partie intégrante des appareils ou qu'ils soient séparés des appareils, et que les appareils sont sous la commande directe du système frigorifique. Le présent document décrit de manière détaillée toutes les exigences correspondant à l'utilisation d'une quantité de fluide frigorigène inflammable allant jusqu'à 150 g par étage d'un système frigorifique. Lorsqu'une charge de fluide frigorigène inflammable dépasse cette quantité, des exigences supplémentaires hors du domaine d'application du présent document s'appliquent. a) Appareils électriques d'essai et de mesurage Il s'agit d'appareils qui, par des moyens d'ordre électromagnétique, mesurent, indiquent ou enregistrent une ou plusieurs grandeurs électriques ou physiques, ainsi que des appareils non-mesureurs tels que générateurs de signaux, étalons de mesure, alimentations de puissance de laboratoire, transducteurs, transmetteurs, etc. b) Appareils électriques de contrôle de procédés industriels Il s'agit d'appareils qui règlent une ou plusieurs grandeurs de sortie selon des valeurs spécifiques, chaque valeur étant déterminée par réglage manuel, par programmation locale ou à distance, ou par une ou plusieurs variables d'entrée. c) Appareils électriques de laboratoire Il s'agit d'appareils qui mesurent, indiquent, surveillent, inspectent ou analysent des matériaux, ou qui servent à préparer des matériaux, y compris les appareils de diagnostic in vitro (DIV). Cette deuxième édition annule et remplace la première édition parue en 2016. Cette édition constitue une révision technique. Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente: a) alignement sur les modifications apportées par l'Amendement 1 de l'IEC 61010-1:2010; b) introduction de nouveaux termes et définitions ou modification de termes pour s'aligner sur la Partie 2-012 et d'autres documents de base. Modifications rédactionnelles permettant d'utiliser les petites majuscules uniquement pour les termes définis. Noter la différence entre "(3.107) utilisé en 4.3.2.101 et "fonctionnement anormal" en 11.7.104.3 et 11.7.104.5; c) clarifications relatives aux essais de refroidissement en 4.4.2.10; d) modifications relatives à l'emploi précis des termes suivants: "température d'application", "", "température du local" et "température ambiante"; e) utilisation du terme défini "pour remplacer "système de refroidissement"; f) déplacement du texte de 4.4.2.101 à 4.3.2.101, en ce sens que le tel que défini consiste à simuler une défaillance des conditions ambiantes au 1.4.1, mais pas une de l'appareil; g) utilisation du terme "appareil" ("equipment" en anglais) pour remplacer le terme "unité", le cas échéant; h) les de 5.1.2 dd) des côtés haute et basse pression pour chaque étage du sont e

Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko uporabo - 2-011. del: Posebne zahteve za hladilno opremo (IEC 61010-2-011:2019)

Ta 2. del standarda IEC 61010 določa posebne varnostne zahteve za naslednje vrste od a) do c) električne opreme in pribora, kadar sta namenjena uporabi, kadar oprema zajema HLADILNE SISTEME kot sestavni del ali ločeno od opreme in kadar oprema neposredno nadzoruje HLADILNI SISTEM. Ta dokument podrobno opisuje vse zahteve, ko se v eni fazi HLADILNEGA SISTEMA uporablja do 150 g VNETLJIVEGA HLADILNEGA SREDSTVA. Dodatne zahteve, ki so zunaj področja uporabe tega dokumenta, se uporabljajo, če polnjenje VNETLJIVEGA HLADILNEGA SREDSTVA preseže to količino.

General Information

• Status: Published
• Publication Date: 18-Nov-2021
• ICS: 19.080 - Electrical and electronic testing
• Technical Committee: CLC/TC 66X - Safety of measuring, control, and laboratory equipment
• Drafting Committee: IEC/TC 66 - IEC_TC_66
• Current Stage: 6060 - Document made available - Publishing
• Start Date: 19-Nov-2021
• Completion Date: 19-Nov-2021
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Mandate: M/511 - Mandate to CEN, CENELEC and ETSI relating to harmonised standards in the field of the Low Voltage Directive
• Ref Project: SIST EN IEC 61010-2-011:2022 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-011: Particular requirements for refrigerating equipment (IEC 61010-2-011:2019)

Relations

• Replaces: EN 61010-2-011:2017 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-011: Particular requirements for refrigerating equipment
• Effective Date: 07-Jun-2022
• Amended By: EN IEC 61010-2-011:2021/A11:2021 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-011: Particular requirements for refrigerating equipment
• Effective Date: 03-Mar-2020
• Revised: prEN IEC 61010-2-011:2025 - Safety requirements for electrical equipment for measurement, control, and laboratory use - Part 2-011: Particular requirements for refrigerating equipment
• Effective Date: 20-Feb-2024

Overview

EN IEC 61010-2-011:2021 (IEC 61010-2-011:2019) specifies particular safety requirements for electrical equipment that incorporate refrigerating systems used for measurement, control and laboratory purposes. It applies to three equipment categories:

• Electrical test and measurement equipment (e.g., signal generators, measurement standards, power supplies),
• Electrical industrial process‑control equipment, and
• Electrical laboratory equipment (including in vitro diagnostic (IVD) devices).

The standard is a Part‑2 document intended to be used together with the latest edition of IEC 61010‑1 and is a group safety publication (IEC Guide 104). It covers refrigerating systems using up to 150 g of flammable refrigerant per stage; larger charges require additional requirements outside this document’s scope.

Key topics and technical requirements

The standard supplements/modifies IEC 61010‑1 and addresses practical safety measures, including:

• Tests for refrigerating performance and failure simulations (cooling tests, leakage, rupture).
• Marking and documentation requirements, including information for equipment containing flammable refrigerants.
• Protection against electric shock and mechanical hazards, plus resistance to mechanical stresses.
• Fire spread mitigation and temperature limits for components (e.g., motor‑compressors).
• Protection against fluids, foreign objects, liberated gases, explosion and implosion.
• Radiation and acoustic hazard controls where relevant.
• Component and piping requirements, interlocks and safety‑critical subassemblies.
• Risk assessment guidance and annexes that cover leakage/rupture, refrigerant hazard information (Annex BB), component piping (Annex CC) and marking for flammable refrigerants (Annex DD).

The 2nd edition aligns with changes introduced by Amendment 1 of IEC 61010‑1:2010, updates defined terms, and clarifies temperature‑related definitions and test conditions.

Practical applications and users

Who uses this standard:

• Manufacturers and designers of laboratory freezers, environmental chambers, refrigerated test equipment, incubators and benchtop refrigerated instruments.
• Safety and compliance engineers responsible for CE/UKCA conformity and product certification.
• Test laboratories, notified bodies and certification agencies verifying equipment safety.
• Procurement/specification teams in laboratories and industry selecting compliant refrigerated instruments.

Practical benefits: guidance for safe design, component selection, labeling, leak mitigation, interlock implementation, and documentation needed to manage risks when small quantities of flammable refrigerants are used.

Related standards

• IEC 61010‑1 (general safety requirements for measurement, control and laboratory equipment) - use in conjunction with Part 2‑011.
• Normative and informative references listed in the standard (e.g., standards for pressure vessels, electrical devices and hazardous locations) are cited for component and piping compliance.

Keywords: EN IEC 61010-2-011:2021, refrigerating equipment safety, flammable refrigerant, laboratory refrigeration standard, IEC 61010, risk assessment, equipment certification.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-2022
Nadomešča:
SIST EN 61010-2-011:2017
Varnostne zahteve za električno opremo za meritve, nadzor in laboratorijsko
uporabo - 2-011. del: Posebne zahteve za hladilno opremo (IEC 61010-2-011:2019)
Safety requirements for electrical equipment for measurement, control, and laboratory
use - Part 2-011: Particular requirements for refrigerating equipment (IEC 61010-2-
011:2019)
Sicherheitsbestimmungen für elektrische Mess-, Steuer-, Regel- und Laborgeräte - Teil 2
-011: Besondere Anforderungen für Kühlgeräte (IEC 61010-2-011:2019)
Règles de sécurité pour appareils électriques de mesurage, de régulation et de
laboratoire - Partie 2-011: Exigences particulières pour appareils de réfrigération for
(IEC 61010-2-011:2019)
Ta slovenski standard je istoveten z: EN IEC 61010-2-011:2021
ICS:
19.080 Električno in elektronsko Electrical and electronic
preskušanje testing
27.200 Hladilna tehnologija Refrigerating technology
71.040.10 Kemijski laboratoriji. Chemical laboratories.
Laboratorijska oprema Laboratory equipment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 61010-2-011

NORME EUROPÉENNE
EUROPÄISCHE NORM
November 2021
ICS 19.080 Supersedes EN 61010-2-011:2017 and all of its
amendments and corrigenda (if any)
English Version
Safety requirements for electrical equipment for measurement,
control, and laboratory use - Part 2-011: Particular requirements
for refrigerating equipment
(IEC 61010-2-011:2019)
Exigences de sécurité pour appareils électriques de Sicherheitsbestimmungen für elektrische Mess-, Steuer-,
mesurage, de régulation et de laboratoire - Partie 2-011: Regel- und Laborgeräte - Teil 2-011: Besondere
Exigences particulières pour appareils de réfrigération Anforderungen für Kühlgeräte
(IEC 61010-2-011:2019) (IEC 61010-2-011:2019)
This European Standard was approved by CENELEC on 2019-04-26. 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, 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: Rue de la Science 23, B-1040 Brussels
© 2021 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 61010-2-011:2021 E

European foreword
The text of document 66/676/CDV, future edition 2 of IEC 61010-2-011, 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 IEC 61010-2-011:2021.
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2022-05-19
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2024-11-19
document have to be withdrawn
This document supersedes EN 61010-2-011:2017 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
This document has been prepared under a Standardization Request given to CENELEC by the
European Commission and the European Free Trade Association, and supports essential
requirements of EU Directive(s) / Regulation(s).
For the relationship with EU Directive(s) / Regulation(s), see informative Annex ZZ, which is an
integral part of EN IEC 61010-2-011:2021/A11:2021.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61010-2-011:2019 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 60079-20-1 NOTE Harmonized as EN 60079-20-1
IEC 60204-1 NOTE Harmonized as EN 60204-1
IEC 61010-2-020 NOTE Harmonized as EN 61010-2-020
ISO 4126-1 NOTE Harmonized as EN ISO 4126-1
ISO 4126-2 NOTE Harmonized as EN ISO 4126-2

IEC 61010-2-011 ®
Edition 2.0 2019-03
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 2-011: Particular requirements for REFRIGERATING EQUIPMENT

Exigences de sécurité pour appareils électriques de mesurage, de régulation et

de laboratoire –
Partie 2-011: Exigences particulières pour APPAREILS DE REFRIGERATION

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 19.080 ISBN 978-2-8322-6658-8

– 2 – IEC 61010-2-011:2019 © IEC 2019
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope and object . 10
2 Normative references . 11
3 Terms and definitions . 11
4 Tests . 13
5 Marking and documentation . 16
6 Protection against electric shock . 19
7 Protection against mechanical HAZARDS . 19
8 Resistance to mechanical stresses . 19
9 Protection against the spread of fire . 19
10 Equipment temperature limits and resistance to heat . 20
11 Protection against HAZARDS from fluids and solid foreign objects . 21
12 Protection against radiation, including laser sources, and against sonic and
ultrasonic pressure . 32
13 Protection against liberated gases and substances, explosion and implosion . 32
14 Components and subassemblies . 32
15 Protection by interlocks . 33
16 HAZARDS resulting from application . 33
17 RISK assessment . 33
Annexes . 34
Annex G (informative) Leakage and rupture from fluids under pressure . 35
Annex L (informative) Index of defined terms . 36
Annex AA (normative) Non-sparking "n" electrical device . 37
Annex BB (informative) HAZARDS associated with REFRIGERATING SYSTEMS and
REFRIGERANTS . 38
Annex CC (informative) Safety requirements for components and piping . 40
Annex DD (informative) Equipment containing FLAMMABLE REFRIGERANTS – Information
and marking requirements. 45
Bibliography . 49

Figure 101 – Schema of a REFRIGERATING SYSTEM incorporating a condenser . 8
Figure 102 – Flow chart illustrating the selection process . 9
Figure 103 – Scratching TOOL tip details . 27

Table 1 – Symbols . 17
Table 101 – Maximum temperatures for MOTOR-COMPRESSORS . 20
Table 102 – Minimum temperature for determination of saturated vapor pressure of
REFRIGERANT . 22
Table 103 – REFRIGERANT flammability parameters . 31
Table CC.1 – Parameters of pressure vessels according to EN 14276-1 . 40
Table CC.2 – Parameters of pipping according to EN 14276-2 . 42

IEC 61010-2-011:2019 © IEC 2019 – 3 –
Table CC.3 – Component and piping requirements . 43
Table CC.4 – Minimum wall thickness for copper and steel tubing . 44
Table DD.1 – Quantity of Group A2/A3 REFRIGERANT per occupied space . 48

– 4 – IEC 61010-2-011:2019 © IEC 2019
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-011: Particular requirements for REFRIGERATING 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
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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6) All users should ensure that they have the latest edition of this publication.
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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 61010-2-011 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.
This second edition cancels and replaces the first edition published in 2016. This edition
constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) alignment with changes introduced by Amendment 1 of IEC 61010-1:2010;
b) introduction of new defined terms or modified terms to align with Part 2-012 and other
source documents. Editorial changes to use small capitals only for defined terms. Note the
difference of defined term ABNORMAL OPERATION (3.107) in 4.3.2.101 and abnormal
operation in 11.7.104.3 and 11.7.104.5;

IEC 61010-2-011:2019 © IEC 2019 – 5 –
c) clarifications for cooling tests in 4.4.2.10;
d) changes pertaining to the accurate employment of the following terms: temperature,
operating temperature, application temperature, CONTROLLED TEMPERATURE, room ambient
and ambient temperature;
e) use of defined term REFRIGERATING SYSTEM to replace cooling system;
ABNORMAL OPERATION, as defined,
f) move text of 4.4.2.101 to 4.3.2.101, since the purpose of
is to simulate failure of the ambient conditions of 1.4.1 but not of the SINGLE FAULT
CONDITION of the equipment;
g) use of the term equipment to replace unit, apparatus, appliance, where applicable;
h) in 5.1.2 dd) PS for high and low sides for each REFRIGERANT stage are required only under
NORMAL CONDITION;
NORMAL CONDITION to replace normal operation;
i) use of defined term
j) use of defined term OPERATOR to replace user.
The text of this International Standard is based on the following documents:
CDV Report on voting
66/676/CDV 66/683/RVC
Full information on the voting for the approval of this International Standard can be found in
the report on voting indicated in the above table.
This document has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of the IEC 61010 series, published under the general title Safety
requirements for electrical equipment for measurement, control, and laboratory use, can be
found on the IEC website.
This Part 2-011 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) and its Amendment 1 (2016), hereinafter
referred to as Part 1.
This Part 2-011 supplements or modifies the corresponding clauses in IEC 61010-1 so as to
convert that publication into the IEC standard: Particular requirements for REFRIGERATING
EQUIPMENT.
Where a particular subclause of Part 1 is not mentioned in this Part 2-011, that subclause
applies as far as is reasonable. Where this Part 2-011 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 and additional list
items are lettered from aa).
– 6 – IEC 61010-2-011:2019 © IEC 2019
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under "http://webstore.iec.ch" in the data related to
the specific document. At this date, the document 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.
IEC 61010-2-011:2019 © IEC 2019 – 7 –
INTRODUCTION
This Part 2-011, along with Part 2-010 and Part 2-012, taken together, address the specific
HAZARDS associated with the heating and cooling of materials by equipment and are organized
as follows:
IEC 61010-2-010 Specifically addresses the HAZARDS associated with equipment
incorporating heating systems.
IEC 61010-2-011 Specifically addresses the HAZARDS associated with equipment
incorporating REFRIGERATING SYSTEMS.
IEC 61010-2-012 Specifically addresses the HAZARDS associated with equipment
incorporating both heating and REFRIGERATING SYSTEMS that interact
with each other such that the combined heating and REFRIGERATING
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.
Guidance for the application of the correct 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
REFRIGERATING SYSTEM or the materials being treated in the intended
heating system, and a
application introduce significant heat into the REFRIGERATING SYSTEM, a determination should
be made as to whether the interaction between the two systems will generate additional or
more severe HAZARDS than if the systems were evaluated separately (CONTROLLED
TEMPERATURE, see flow chart of Figure 102 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 functions, or if 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:
MOTOR-
– The excess of temperature of the low-pressure side (return temperature) to the
COMPRESSOR is higher than admissible. 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 excess of pressure of the low-pressure side at the inlet to the MOTOR-COMPRESSOR is
higher than admissible. 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 excess of temperature of the high-pressure side to the condenser is higher than
admissible. The temperatures of the high-pressure side under the most unfavourable

– 8 – IEC 61010-2-011:2019 © IEC 2019
conditions can present a temperature HAZARD if the OPERATOR is exposed, or an electrical
HAZARD if insulation is degraded.
– The excess of pressure of the high-pressure side to the condenser is higher than
REFRIGERANT components downstream of the MOTOR-COMPRESSOR up to
admissible. The
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 correct
safety margin for a pressure vessel.
CONTROLLED TEMPERATURES where the heat is being extracted from, may
– The maximum
impact the maximum temperature of the low-pressure side to the MOTOR-COMPRESSOR as
well as present a temperature HAZARD if the OPERATOR is exposed, or an electrical HAZARD
if insulation is degraded. Whether this CONTROLLED 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.
Figure 101 – Schema of a REFRIGERATING SYSTEM incorporating a condenser

IEC 61010-2-011:2019 © IEC 2019 – 9 –
The selection process is illustrated in the following flow chart (see Figure 102).

Figure 102 – Flow chart illustrating the selection process

– 10 – IEC 61010-2-011:2019 © IEC 2019
SAFETY REQUIREMENTS FOR ELECTRICAL EQUIPMENT
FOR MEASUREMENT, CONTROL, AND LABORATORY USE –

Part 2-011: Particular requirements for REFRIGERATING EQUIPMENT

1 Scope and object
This clause of Part 1 is applicable, except as follows:
1.1.1 Equipment included in scope
Replacement:
Replace the second paragraph by the following:
This Part 2 of IEC 61010 specifies particular safety requirements for the following types
a) to c) of electrical equipment and their accessories, wherever they are intended to be used,
whenever that equipment incorporates REFRIGERATING SYSTEMS as an integral part of, or
separate from, the equipment and the equipment is in direct control of the REFRIGERATING
SYSTEM.
This document details all the requirements when up to 150 g of FLAMMABLE REFRIGERANT are
used per stage of a REFRIGERATING SYSTEM. Additional requirements beyond the current scope
of this document apply if a REFRIGERANT charge of FLAMMABLE REFRIGERANT exceeds this
amount.
Addition:
Add the following text after the last paragraph:
NOTE 101 Examples for REFRIGERATING EQUIPMENT include, but are not limited to, laboratory equipment such as
laboratory refrigerators, freezers, refrigerated display cabinets.
It is possible that all or part of the equipment falls within the scope of one or more other
Part 2 standards of IEC 61010 as well as within the scope of this standard. In that case, the
requirements of those other Part 2 standards will also apply. In particular, if equipment is
intended to be used as a centrifuge, the requirements of IEC 61010-2-020 apply. However,
when the equipment incorporates a refrigerating system and a heating function where the
combination of the two introduces additional or more severe HAZARDS than if treated
separately, then it is possible that IEC 61010-2-012 is applicable instead of this Part 2-011.
See further information in the flow chart (Figure 102) for the selection process and guidance
in the Introduction.
1.1.2 Equipment excluded from scope
Addition:
Add the following new item after item j):
or equipment incorporating:
aa) a transcritical REFRIGERANT SYSTEM (system that uses CO ) or a system that uses
ammonia (NH ) as the REFRIGERANT.
IEC 61010-2-011:2019 © IEC 2019 – 11 –
1.2 Object
1.2.1 Aspects included in scope
Replacement:
Replace the first paragraph by the following:
The object of this document is to ensure that the design and methods of construction of
REFRIGERATING EQUIPMENT provide adequate protection for OPERATORS, bystanders, trained
service personnel, and the surrounding area against the specific HAZARDS that relate to
REFRIGERATING SYSTEMS.
Addition:
Add the following note after the existing note:
NOTE 101 A list of HAZARDS typically associated with REFRIGERATING SYSTEMS and REFRIGERANTS is included in
Annex BB.
2 Normative references
This clause of Part 1 is applicable, except as follows:
Addition:
Add the following references to the list:
IEC 60079-15:2010, Explosive atmospheres – Part 15: Equipment protection by type of
protection "n"
IEC 60335-2-34:2012, Household and similar electrical appliances – Safety – Part 2-34:
Particular requirements for motor-compressors
IEC 60335-2-34:2012/AMD1:2015
IEC 60335-2-34:2012/AMD2:2017
ISO 7010, Graphical symbols – Safety colours and safety signs – Registered safety signs
3 Terms and definitions
This clause of Part 1 is applicable, except as follows:
Addition:
Add the following new terms and definitions:
3.101
REFRIGERATING EQUIPMENT
test, measurement, control or laboratory equipment that incorporates a REFRIGERATING SYSTEM
either as an integral part of or separate from the equipment
3.102
REFRIGERATING SYSTEM
combination of interconnected REFRIGERANT-containing parts constituting one closed
REFRIGERANT circuit in which the REFRIGERANT is circulated for the purpose of extracting and
rejecting heat
– 12 – IEC 61010-2-011:2019 © IEC 2019
[SOURCE: ISO 5149-1:2014, 3.1.9, modified – The term in brackets "(heat pump)", the words
"(heating and cooling)", and the note to entry, have been omitted.]
3.103
FLAMMABLE REFRIGERANT
REFRIGERANT with a flammability classification of group 2 or 3 in accordance with ISO 5149-1
and ISO 817
Note 1 to entry: For REFRIGERANT blends which have more than one flammability classification, either the most
unfavourable classification is taken for the purpose of this definition or the blend itself is evaluated for flammability
in accordance with ISO 817.
3.104
HPCO
HIGH PRESSURE CUT-OUT
pressure-actuated device that is designed to stop the operation of the pressure generator
Note 1 to entry: This note applies to the French language only.
3.105
MAXIMUM ALLOWABLE PRESSURE
PS
maximum pressure for which the equipment is designed, as specified by the manufacturer
Note 1 to entry: This note applies to the French language only.
[SOURCE: ISO 5149-1:2014, 3.3.3]
3.106
SOAKED TEMPERATURE CONDITION
environmental temperature condition when all the temperatures in the equipment under test
(EUT) equal to ±2 °C of the test ambient temperature
Note 1 to entry: This note applies to the French language only.
3.107
ABNORMAL OPERATION
operation of a REFRIGERATING EQUIPMENT with a limited RATED ambient temperature range in
ambient temperature conditions outside that limitation but within the temperature limits of
1.4.1
3.108
REFRIGERANT
fluid used for heat transfer in a REFRIGERATING SYSTEM, which absorbs heat at a low
temperature and a low pressure of the fluid and rejects heat at a higher temperature and a
higher pressure of the fluid, usually involving changes of state of the fluid
[SOURCE: ISO 5149-1:2014, 3.7.9, modified – The note has been removed.]
3.109
CONTROLLED TEMPERATURE
temperature where the evaporator is located and to which the low-pressure side of the
equipment is exposed, as a result of heat transfer either by active heating or from the
application system or specimen
Note 1 to entry: For heat pump systems, where a four-way valve is used to shift between heating and cooling, the
function of the condenser and evaporator is exchanged.

IEC 61010-2-011:2019 © IEC 2019 – 13 –
3.110
LOWER EXPLOSIVE LIMIT
LEL
concentration of flammable gas or vapour in air, below which an explosive gas atmosphere
will not be formed
Note 1 to entry: This note applies to the French language only.
[SOURCE: IEC 60050-426:2008, 426-02-09]
3.111
MOTOR-COMPRESSOR
refrigerating subassembly consisting of the mechanical mechanism of the compressor and the
motor, both of which are enclosed in the same sealed housing, with no external shaft seals,
and with the motor operating in a REFRIGERANT atmosphere with or without oil
Note 1 to entry: The housing may be permanently sealed, such as by welding or brazing (hermetic MOTOR-
COMPRESSOR), or may be sealed by gasketted joints (semi-hermetic MOTOR-COMPRESSOR). A TERMINAL box, a
TERMINAL boxcover, and other electrical components or an electronic control system may be included.
[SOURCE: IEC 60335-2-34:2012, 3.101, modified – "appliance" has been replaced by
"refrigerating subassembly" and note 2 has been removed.]
3.112
CONDENSING UNIT
specific refrigerating subassembly combination for a given REFRIGERANT, consisting of one or
more MOTOR-COMPRESSORS, condensers, liquid receivers (when required) and the regularly
furnished accessories
[SOURCE: ISO 5149-1:2014, 3.4.5, modified – The definition has been adapted for the
specific case of refrigerating equipment.]
4 Tests
This clause of Part 1 is applicable, except as follows:
4.3 Reference test conditions
4.3.1 Environmental conditions
Addition:
Add the following text after item d):
Since the temperatures, pressures and current draws for a REFRIGERATING SYSTEM are
significantly impacted by ambient temperatures in a non-linear way, linear extrapolation of
test data is not possible. Therefore tests to establish temperatures, pressures, and current
draws of a REFRIGERATING SYSTEM shall be conducted under the following environmental
conditions:
aa) an ambient temperature of 40 °C;
bb) a relative humidity not exceeding the limits of 1.4.1 d).
If the equipment is RATED by the manufacturer to operate in extended environmental
conditions as defined by 1.4.2 or a more restricted environment condition in accordance with
1.4.1, note 2, then these conditions will define the settings for 4.3.1 aa) or 4.3.1 bb).

– 14 – IEC 61010-2-011:2019 © IEC 2019
When the REFRIGERATING SYSTEM is water cooled, the temperature of the water supply shall be
the maximum as specified by the manufacturer (see 5.4.3) with the worst case water pressure
as specified by the manufacturer.
If a restricted environment condition in accordance with 1.4.1, note 2, is employed then the
test of 4.3.2.101 applies.
4.3.2 State of equipment
4.3.2.1 General
Addition:
Add the following text after the first paragraph:
When measuring temperatures, pressures and current draws of equipment incorporating a
REFRIGERATING SYSTEM the tests shall be started from a SOAKED TEMPERATURE CONDITION when
all pressures have fully equalized. Tests at the extremes of the input voltage (±10 %) shall
start under these voltage conditions and achieve a stable state but need not start from a
SOAKED TEMPERATURE CONDITION. Safety protective devices shall not operate during this test.
Addition:
Add the following new subclause:
4.3.2.101 ABNORMAL OPERATION to simulate the failure of the controlled environment
For REFRIGERATING EQUIPMENT intended to operate in a restricted environment and tested in
accordance with 4.3.1 this additional test of ABNORMAL OPERATION shall apply to simulate the
failure of the controlled environment in the installation.
Having determined the worst case test condition for the temperature and pressure tests under
10.4.1 the equipment is run under these conditions until a steady state has been achieved.
The test environment is then increased to the limits from 1.4.1 for normal environmental
conditions (40 °C, up to 50 % RH) and the equipment is allowed to stabilize, and the
maximum temperatures and pressures are recorded. The operation of protective devices is
permitted during this test. If steady state conditions are not possible due to the operation of
protective devices then the maximum values recorded for this test shall be either:
– the maximum temperatures and pressures at the point of operation of non-resettable or
manually resettable devices. The manually resettable device does not need to be reset
during this test; or
– the maximum temperatures and pressures achieved after the cycling of auto-resetting
protective devices. Cycling shall continue until it is clear that successive cycles will not
develop higher maximum values.
4.4.2 Application of fault conditions
4.4.2.10 Cooling
Replacement:
Replace the text with the following:
For cooling not associated with the cooling of the REFRIGERATING SYSTEM:
a) air-holes with filters shall be closed;
b) forced cooling by motor-driven fans shall be stopped;

IEC 61010-2-011:2019 © IEC 2019 – 15 –
c) cooling by circulation of water or other coolant shall be stopped.
For cooling associated with the cooling of the REFRIGERATING SYSTEM:
d) Condenser fan stall test – for an air cooled REFRIGERATING SYSTEM
Each condenser fan shall be stalled one at a time unless a single fault could disable all
condenser fans simultaneously, or with the condenser airflow restricted, whichever is the
worst case, until maximum stabilized pressure is attained or until representative maximum
temperatures are attained under cycling load. The temperatures and pressures shall be
monitored at short intervals throughout the test for the pressures to ensure that peak
pressures are captured. This test is conducted at an ambient temperature of 25 °C ± 3 °C.
e) Condenser water failure test – for a water cooled REFRIGERATING SYSTEM
The REFRIGERATING SYSTEM shall be operated with the condensing water shut off, or with
the condensing water restricted whichever is the worst case, until maximum stabilized
temperatures are attained or until representative maximum temperatures are attained
under cycling load. The temperatures and pressures shall be monitored at short intervals
throughout the test for the pressures to ensure that peak pressures are captured. This test
is conducted at an ambient temperature of 25 °C ± 3 °C.
If a manual reset HPCO is relied upon to limit the peak pressure during tests d) or e), then it
shall be reset manually within 6 s of operation for 10 cycles.
If an automatic reset HPCO is relied upon to limit the peak pressure during tests d) or e), then
it shall be permitted to cycle automatically until it can be demonstrated that peak
temperatures and pressures have been achieved.
If it can be demonstrated that an HPCO will operate during tests d) or e), the manufacturer can
elect to waive this test, but will set the PS for the high and low side of the MOTOR-COMPRESSOR
RATING of the HPCO.
to the
For equipment with both air-cooled and water-cooled condensers, only one can be faulted at a
time unless the customer is permitted to run either the air-cooled or water-cooled condenser
(the design incorporates a redundant cooling option for the condenser).
For a cascade REFRIGERATING SYSTEM, if a heat exchanger from the first stage system acts as
a condenser to the second stage system, then the manufacturer can elect to run each
condenser stage individually under the tests of d) or e) accordingly. In this case, disabling the
first stage system is considered to simulate the second stage running under a test condition
of d) or e).
Addition:
Add the following new subclause:
4.4.2.101 Uncontrolled cooling test
Temperature controllers shall be overridden to produce uncontrolled cooling. This applies
regardless of whether the controller controls the temperature of the equipment, heat transfer
medium or material being processed.
4.4.3.1 General
Addition:
Add the following paragraph after the first paragraph:

– 16 – IEC 61010-2-011:2019 © IEC 2019
Owing to the time it can take to achieve stable conditions for a REFRIGERATING SYSTEM, the
duration of single fault tests can be longer than 4 h unless it is clear that stable conditions
have been maintained for at least 1 h.
5 Marking and documentation
This clause of Part 1 is applicable, except as follows:
5.1.2 Identification
Addition:
Add the following new items after the note following item b):
aa) the total mass of REFRIGERANT for each separate REFRIGERANT circuit;
bb) for a single component REFRIGERANT, at least one of the following:
– the chemical name,
– the chemical formula,
– the REFRIGERANT number,
cc) for a blended REFRIGERANT, at least one of the following:
– the chemical name and nominal proportion of each of its components,
– the chemical formula and nominal proportion of each of its components,
– the REFRIGERANT number and nominal proportion of each of its components,
– the REFRIGERANT number of the REFRIGERANT blend,
NOTE 101 REFRIGERANT numbers are quoted in accordance with ISO 817 or other REFRIGERANT classification
standard, for example ANSI/ASHRAE 34.
dd) MAXIMUM ALLOWABLE PRESSURE (PS) under NORMAL CONDITION, high- and low-pressure
sides for each REFRIGERANT stage.
NOTE 102 The collation of the test results that define PS is detailed in 11.7.101.
5.1.3 MAINS supply
Replacement:
Replace the conformity statement as follows:
Conformity is checked by inspection and by measurement of the power or input current to
check the marking of 5.1.3 c). The measurement is made with the equipment in the condition
of maximum power consumption, but to exclude any initial inrush current, it is not made until
the current has stabilized (usually after 1 min). Transients are ignored. For REFRIGERATING
EQUIPMENT, the impact of extreme ambient temperatures and the interaction of any defrost
mode need to be evaluated in determining the condition of maximum power consumption.
Addition:
Add the following new symbols to Table 1:

IEC 61010-2-011:2019 © IEC 2019 – 17 –
Table 1 – Symbols
Number Symbol Reference Description
ISO 7010-W010 Warning; low temperature/freezing conditions, frostbite
(2011-05) HAZARD (MOD)
ISO 7010-W021
102 Warning; flammable material
(2011-05)
ISO 7010-W011
103 Warning; slippery surface
(2011-05)
ISO 7010-W024
104 Warning; crushing of hands
(2011-05)
5.2 Warning markings
Replacement:
Replace item a) by the following:
a) the perpendicular height of the triangle for all warning symbols shall be at least 15 mm.
The height of text shall be at least 1,8 mm, depending on the size of the equipment, the
legibility during NORMAL USE and the space available for the symbol. Symbols and text
shall have clear contrast in colour with the background.
Addition:
Add the following new paragraph before the conformity statement:
Warning markings or symbols for particular HAZARDS, which exist or develop only when
performing installation or maintenance of the equipment, shall be marked and visible only
when executing this particular maintenance. For example, the marking of the type of
FLAMMABLE REFRIGERANT and of the flammable insulation blowing gas, shall be visible when
gaining access to the MOTOR-COMPRESSORs, and, in the case of equipment with a remote
REFRIGERANT CONDENSING UNIT, the pipe connections. Symbol 102 of Table 1 shall be placed
on the nameplate of the equipment near the declaration of the REFRIGERANT type and charge
information. It shall be visible after installation of the REFRIGERATING EQUIPMENT.
5.4.1 General
Replacement:
Replace item d) by the following:
d) the information specified in 5.4.2 to 5.4.6, 5.4.101 and 5.4.102;
5.4.3 Equipment Installation
Replacement:
Replace the note with the following text:

– 18 – IEC 61010-2-011:2019 © IEC 2019
NOTE A statement in the documentation for the installation can be added to indicate that the safety of any system
incorporating the equipment is the responsibility of the assembler of the system.
Add the following new note:
NOTE 101 In the US, equipment containing FLAMMABLE REFRIGERANT is required to have additional instructions –
see informative Annex DD.
5.4.4 Equipment operation
Addition:
Add the following new item after 5.4.4 j):
aa) information to allow safe access during use, including identification of trip and slip
HAZARDS (see also 7.3.101 and 16.101).
Addition:
Add the following new subclauses:
5.4.101 Additional instructi
...