IEC 60335-2-40:2018
(Main)Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
Household and similar electrical appliances - Safety - Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and dehumidifiers
IEC 60335-2-40:2018 is available as IEC 60335-2-40:2018 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.
IEC 60335-2-40:2018 deals with the safety of electric heat pumps, including sanitary hot water heat pumps, air conditioners, and dehumidifiers incorporating motor-compressors and hydronic fan coils units, their maximum rated voltages being not more than 250 V for single phase appliances and 600 V for all other appliances. Partial units are within the scope of this International Standard.
Appliances not intended for normal household use but which nevertheless may be a source of danger to the public, such as appliances intended to be used by laymen in shops, in light industry and on farms, are within the scope of this standard. The appliances referenced above may consist of one or more factory-made assemblies. If provided in more than one assembly, the separate assemblies are to be used together, and the requirements are based on the use of matched assemblies. This standard does not take into account refrigerants other than group A1, A2L, A2 and A3 as defined by ISO 817 classification, A2L refrigerants are limited to those of a molar mass of more than or equal to 42 kg/kmol based on WCF – Worst Case Formulation as specified in ISO 817. This standard specifies particular requirements for the use of flammable refrigerants. Unless specifications are covered by this standard, including the annexes, requirements for refrigerating safety are covered by ISO 5149. Supplementary heaters, or a provision for their separate installation, are within the scope of this standard, but only heaters which are designed as a part of the appliance package, the controls being incorporated in the appliance. For appliances intended to be used in vehicles or on board ships or aircraft, additional requirements may be necessary; for appliances subjected to pressure, additional requirements may be necessary; This standard does not apply to: humidifiers intended for use with heating and cooling equipment (IEC 60335-2-88); appliances designed exclusively for industrial processing or appliances intended to be used in locations where special conditions prevail, such as the presence of a corrosive or explosive atmosphere (dust, vapour or gas). This sixth edition cancels and replaces the fifth edition published in 2013 and its Amendment 1:2016. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- Clause 1 – limiting A2L refrigerants to those of a molar mass of more than or equal to 42 kg/kmol;
- Clause 7 – added requirements for A2L refrigerants,
- Clause 7 – added requirement for pre-charge pipe sets, detection systems, ventilation and the resulting charge;
- Clause 7 – added requirements for UV-C systems;
- Clause 7 – added requirements for transcritical refrigerating systems;
- Subclause 19.7 – amended text to match the intention of the subclause;
- Clause 21 – added requirements for transcritical refrigerating systems;
- Subclause 22 – added requirements for A2L refrigerants;
- Subclause 22– added detection systems;
- Subclause 22 – added new requirements for enhanced tightness refrigerating systems;
- Subclause 22 – added new requirements for UV-C;
- Clause 23 – added new requirements for UV-C;Clause
- Clause 24 – added requirements for transcritical refrigerating systems;
- Subclause 24 – added requirements for detection systems and airflow;
- Clause 32 added new requirements for UV-C;
- Annex BB – revised to add surface temperatures;
- Annex DD – added requirements for A2L refrigerants and amended requirements for flammable refrigerants to exempt A2L refrigerants;
- Annex GG – added requirements for A2L refrigerants;
- Annex GG.1 – amended Table GG.1 and related wording
- Annex GG.7 – added requirement to test;
- Annex GG.8 to GG.1
Appareils électrodomestiques et analogues - Sécurité - Partie 2-40 : Exigences particulières pour les pompes à chaleur électriques, les climatiseurs et les déshumidificateurs
L'IEC 60335-2-40:2018 traite de la sécurité des pompes à chaleur électriques, notamment les pompes à chaleur pour production d'eau chaude sanitaire, les climatiseurs et les déshumidificateurs qui comportent des motocompresseurs et des ventiloconvecteurs hydroniques, dont la tension assignée maximale n'est pas supérieure à 250 V pour les appareils monophasés et à 600 V pour tous les autres appareils. Les unités partielles relèvent du domaine d'application de la présente Norme internationale.
Les appareils non destinés à un usage domestique normal, mais qui néanmoins peuvent constituer une source de danger pour le public, tels que les appareils destinés à être utilisés par des usagers non avertis dans des magasins, chez des artisans et dans des fermes, sont compris dans le domaine d'application de la présente norme.
Les appareils indiqués ci-dessus peuvent consister en un ou plusieurs ensembles fabriqués en usine. Si les appareils sont fournis en plusieurs ensembles, les ensembles doivent être utilisés conjointement et les exigences correspondantes dépendent de l'utilisation des ensembles assortis.
Les exigences relatives à la sécurité des systèmes frigorifiques sont spécifiées dans les normes ISO 5149-1, ISO 5149-2 et ISO 5149-3. En outre, l'IEC 60335-2-21 spécifie les exigences relatives aux cuves destinées au stockage de l'eau chauffée dans les pompes à chaleur pour production d'eau chaude sanitaire.
La présente norme ne couvre pas les fluides frigorigènes qui n'appartiennent pas aux groupes A1, A2L, A2 et A3 de la classification ISO 817. Les fluides frigorigènes A2L se limitent à ceux dont la masse molaire est supérieure ou égale à 42 kg/kmol d'après la formule "la plus défavorable" (WCF, Worst Case Formula) spécifiée dans l'ISO 817.
La présente norme spécifie les exigences particulières pour l'utilisation des fluides frigorigènes inflammables. Sauf spécification contraire dans la présente norme et ses annexes, les exigences relatives à la sécurité des systèmes frigorifiques sont spécifiées dans la série ISO 5149.
Les dispositifs de chauffage supplémentaires (ou les dispositions concernant leur installation) sont couverts par le domaine d'application de la présente norme, mais uniquement les dispositifs de chauffage qui sont conçus en tant que partie de l'appareil, les commandes étant incorporées à l'appareil.
L'attention est attirée sur le fait que:
- pour les appareils destinés à être utilisés dans des véhicules ou à bord de navires ou d'avions, des exigences supplémentaires peuvent être nécessaires;
- pour les appareils à pression, des exigences supplémentaires peuvent être nécessaires;
- dans de nombreux pays, des exigences supplémentaires sont spécifiées par exemple par les organismes nationaux de la santé publique responsables de la protection des travailleurs et par les organismes nationaux responsables du stockage, du transport, de la construction des bâtiments et des installations.
La présente norme ne s'applique pas:
- aux humidificateurs destinés à être utilisés avec des appareils de chauffage et de refroidissement (IEC 60335 2-88);
- aux appareils prévus exclusivement pour des usages industriels;
- aux appareils destinés à être utilisés dans des locaux présentant des conditions particulières, telles que la présence d'une atmosphère corrosive ou explosive (poussière, vapeur ou gaz).
Cette sixième édition annule et remplace la cinquième édition parue en 2013 et son Amendement 1:2016. Cette édition constitue une révision technique.
Cette édition inclut les modifications techniques majeures suivantes par rapport à l'édition précédente:
– à l'Article 1, les fluides frigorigènes A2L se limitent à ceux dont la masse molaire est supérieure ou égale à 42 kg/kmol;
– à l'Article 7, des exigences ont été ajoutées pour les fluides frigorigènes A2L;
– à l'Article 7, une exigence a été ajoutée pour les ensembles de tuyaux de précharge, les systèmes de détection, la ventilation et la charge obtenue;
– à l'Art
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IEC 60335-2-40 ®
Edition 6.0 2018-01
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners and
dehumidifiers
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
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latest edition, a corrigenda or an amendment might have been published.
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bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
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IEC 60335-2-40 ®
Edition 6.0 2018-01
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners
and dehumidifiers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 23.120 ISBN 978-2-8322-5253-6
– 2 – IEC 60335-2-40:2018 IEC 2018
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 10
4 General requirement . 16
5 General conditions for the tests . 16
6 Classification . 17
7 Marking and instructions . 18
8 Protection against access to live parts . 23
9 Starting of motor-operated appliances . 23
10 Power input and current . 23
11 Heating . 23
12 Void . 29
13 Leakage current and electric strength at operating temperature . 29
14 Transient overvoltages . 29
15 Moisture resistance . 29
16 Leakage current and electric strength . 30
17 Overload protection of transformers and associated circuits . 31
18 Endurance . 31
19 Abnormal operation . 31
20 Stability and mechanical hazards . 36
21 Mechanical strength . 36
22 Construction . 36
23 Internal wiring . 46
24 Components . 46
25 Supply connection and external flexible cords . 47
26 Terminals for external conductors . 47
27 Provision for earthing . 47
28 Screws and connections . 47
29 Clearances, creepage distances and solid insulation . 48
30 Resistance to heat and fire . 48
31 Resistance to rusting . 48
32 Radiation, toxicity and similar hazards . 48
Annexes . 54
Annex D (normative) Thermal motor protectors . 54
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 54
Annex AA (informative) Examples for operating temperatures of the appliance . 55
Annex BB (normative) Selected information about refrigerants . 56
Annex CC (informative) Transportation, marking and storage for units that employ
flammable refrigerants . 58
Annex DD (normative) Requirements for operation, service and installation manuals of
appliances using flammable refrigerants . 59
Annex EE (normative) Pressure tests . 68
Annex FF (normative) Leak simulation tests . 71
Annex GG (normative) Charge limits, ventilation requirements and requirements for
secondary circuits . 73
Annex HH (informative) Competence of service personnel . 99
Annex II (Void) . 102
Annex JJ (normative) Allowable opening of relays and similar components to prevent
ignition of A2L refrigerants . 103
Annex KK (normative) Test method for hot surface ignition temperature for A2L . 105
Annex LL (normative) Refrigerant detection systems for A2L refrigerants . 109
Annex MM (normative) Refrigerant sensor location confirmation test . 111
Annex NN (normative) Flame arrest enclosure verification test for A2L refrigerants . 113
Annex OO (normative) UV radiation conditioning . 115
Bibliography . 116
Figure 101 – Example of label for field charged units . 50
Figure 102 – Arrangement for heating test of appliances with supplementary heater . 52
Figure 103 – Supply circuit for locked-rotor test of a motor of the single-phase type –
Revise as needed for three-phase test . 53
Figure GG.1 – Unventilated area. 95
Figure GG.2 – Mechanical ventilation . 96
Figure GG.3 – Isosceles triangle arrow test gauge . 96
Figure GG.4 – Measurement of vibration amplitude. 96
Figure GG.5 – Relevant heights h , h and h for calculation of A and m . 97
inst 0 rel min max
Figure GG.6 – Airflow direction . 98
Figure KK.1 – Front view of test apparatus labels . 105
Figure KK.2 – Test apparatus with dimensions . 106
Figure KK.3 – Top view of test apparatus . 107
Table 3 – Temperature limits . 27
Table 101 – UVC irradiance measurement location . 49
Table AA.1 – Examples for operating temperatures of the appliance . 55
Table BB.1 – Selected information about refrigerants. 56
Table DD.1 – Mandatory clauses in each manual . 59
Table GG.1 – Outline of Annex GG (informative). 74
Table GG.2 – Circulation airflow . 78
Table GG.3 – Appliance with packaging . 83
Table GG.4 – Appliance without packaging . 83
Table GG.5 – Minimum airflow . 94
– 4 – IEC 60335-2-40:2018 IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –
Part 2-40: Particular requirements for electrical heat pumps,
air-conditioners and dehumidifiers
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 w
...
IEC 60335-2-40 ®
Edition 6.0 2018-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners
and dehumidifiers
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
either IEC or IEC's member National Committee in the country of the requester. If you have any questions about IEC
copyright or have an enquiry about obtaining additional rights to this publication, please contact the address below or
your local IEC member National Committee for further information.
IEC Central Office Tel.: +41 22 919 02 11
3, rue de Varembé info@iec.ch
CH-1211 Geneva 20 www.iec.ch
Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigenda or an amendment might have been published.
IEC Catalogue - webstore.iec.ch/catalogue Electropedia - www.electropedia.org
The stand-alone application for consulting the entire The world's leading online dictionary of electronic and
bibliographical information on IEC International Standards, electrical terms containing 21 000 terms and definitions in
Technical Specifications, Technical Reports and other English and French, with equivalent terms in 16 additional
documents. Available for PC, Mac OS, Android Tablets and languages. Also known as the International Electrotechnical
iPad. Vocabulary (IEV) online.
IEC publications search - webstore.iec.ch/advsearchform IEC Glossary - std.iec.ch/glossary
The advanced search enables to find IEC publications by a 67 000 electrotechnical terminology entries in English and
variety of criteria (reference number, text, technical French extracted from the Terms and Definitions clause of
committee,…). It also gives information on projects, replaced IEC publications issued since 2002. Some entries have been
and withdrawn publications. collected from earlier publications of IEC TC 37, 77, 86 and
CISPR.
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IEC 60335-2-40 ®
Edition 6.0 2018-01
REDLINE VERSION
INTERNATIONAL
STANDARD
colour
inside
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners
and dehumidifiers
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 23.120 ISBN 978-2-8322-5333-5
– 2 – IEC 60335-2-40:2018 RLV IEC 2018
CONTENTS
FOREWORD . 5
INTRODUCTION . 9
1 Scope . 10
2 Normative references . 11
3 Terms and definitions . 12
4 General requirement . 19
5 General conditions for the tests . 19
6 Classification . 20
7 Marking and instructions . 20
8 Protection against access to live parts . 26
9 Starting of motor-operated appliances . 26
10 Power input and current . 26
11 Heating . 27
12 Void . 32
13 Leakage current and electric strength at operating temperature . 32
14 Transient overvoltages . 32
15 Moisture resistance . 32
16 Leakage current and electric strength . 34
17 Overload protection of transformers and associated circuits . 34
18 Endurance . 34
19 Abnormal operation . 34
20 Stability and mechanical hazards . 39
21 Mechanical strength . 39
22 Construction . 39
23 Internal wiring . 49
24 Components . 49
25 Supply connection and external flexible cords . 50
26 Terminals for external conductors . 51
27 Provision for earthing . 51
28 Screws and connections . 51
29 Clearances, creepage distances and solid insulation . 51
30 Resistance to heat and fire . 51
31 Resistance to rusting . 51
32 Radiation, toxicity and similar hazards . 52
Annexes . 57
Annex D (normative) Thermal motor protectors . 57
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 57
Annex AA (informative) Examples for operating temperatures of the appliance . 58
Annex BB (normative) Selected information about refrigerants . 59
Annex CC (informative) Transportation, marking and storage for units that employ
flammable refrigerants . 62
Annex DD (normative) Instruction manual for servicing refrigerant containing
appliances Requirements for operation, service and installation manuals
of appliances using flammable refrigerants . 63
Annex EE (normative) Pressure tests . 72
Annex FF (normative) Leak simulation tests . 75
Annex GG (normative) Charge limits, ventilation requirements and requirements for
secondary circuits . 77
Annex HH (informative) Competence of service personnel . 106
Annex II (Void) . 109
Annex JJ (normative) Allowable opening of relays and similar components to prevent
ignition of A2L refrigerants . 110
Annex KK (normative) Test method for hot surface ignition temperature for A2L . 112
Annex LL (normative) Refrigerant detection systems for A2L refrigerants . 116
Annex MM (normative) Refrigerant sensor location confirmation test . 118
Annex NN (normative) Flame arrest enclosure verification test for A2L refrigerants . 120
Annex OO (normative) UV radiation conditioning . 122
Bibliography . 123
Figure 101 – Example of label for field charged units . 53
Figure 101 102 – Arrangement for heating test of appliances with supplementary
heater . 55
Figure 102 103 – Supply circuit for locked-rotor test of a motor of the single-phase
type – Revise as needed for three-phase test . 56
Figure GG.1 – Unventilated area. 102
Figure GG.2 – Mechanical ventilation . 103
Figure GG.3 – Isosceles triangle arrow test gauge . 103
Figure GG.4 – Measurement of vibration amplitude. 103
Figure GG.5 – Relevant heights h , h and h for calculation of A and m . 104
inst 0 rel min max
Figure GG.6 – Airflow direction . 105
Figure KK.1 – Front view of test apparatus labels . 112
Figure KK.2 – Test apparatus with dimensions . 113
Figure KK.3 – Top view of test apparatus . 114
Table – Minimum room area (m ) (see Note 2 of Clause GG.2) .
Table – Maximum charge (kg) (see Note 2 of Clause GG.2) .
Table – Mass of refrigerants .
Table 3 – Temperature limits . 30
Table 101 – UVC irradiance measurement location . 52
Table AA.1 – Examples for operating temperatures of the appliance . 58
Table BB.1 – Selected information about refrigerants. 59
Table DD.1 – Mandatory clauses in each manual . 63
Table GG.1 – Outline of Annex GG (informative). 78
Table GG.2 – Circulation airflow . 83
– 4 – IEC 60335-2-40:2018 RLV IEC 2018
Table GG.3 – Appliance with packaging . 88
Table GG.4 – Appliance without packaging . 89
Table GG.5 – Minimum airflow . 101
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
HOUSEHOLD AND SIMILAR ELECTRICAL APPLIANCES – SAFETY –
Part 2-40: Particular requirements for electrical heat pumps,
air-conditioners and dehumidifiers
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardizati
...
IEC 60335-2-40 ®
Edition 6.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners
and dehumidifiers
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-40: Exigences particulières pour les pompes à chaleur électriques,
les climatiseurs et les déshumidificateurs
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form
or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from
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Switzerland
About the IEC
The International Electrotechnical Commission (IEC) is the leading global organization that prepares and publishes
International Standards for all electrical, electronic and related technologies.
About IEC publications
The technical content of IEC publications is kept under constant review by the IEC. Please make sure that you have the
latest edition, a corrigendum or an amendment might have been published.
IEC publications search - webstore.iec.ch/advsearchform Electropedia - www.electropedia.org
The advanced search enables to find IEC publications by a The world's leading online dictionary on electrotechnology,
variety of criteria (reference number, text, technical containing more than 22 000 terminological entries in English
committee,…). It also gives information on projects, replaced and French, with equivalent terms in 16 additional languages.
and withdrawn publications. Also known as the International Electrotechnical Vocabulary
(IEV) online.
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IEC 60335-2-40 ®
Edition 6.0 2018-01
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Household and similar electrical appliances – Safety –
Part 2-40: Particular requirements for electrical heat pumps, air-conditioners
and dehumidifiers
Appareils électrodomestiques et analogues – Sécurité –
Partie 2-40: Exigences particulières pour les pompes à chaleur électriques,
les climatiseurs et les déshumidificateurs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 23.120 ISBN 978-2-8322-7980-9
– 2 – IEC 60335-2-40:2018 IEC 2018
CONTENTS
FOREWORD . 4
INTRODUCTION . 7
1 Scope . 8
2 Normative references . 9
3 Terms and definitions . 10
4 General requirement . 16
5 General conditions for the tests . 16
6 Classification . 17
7 Marking and instructions . 18
8 Protection against access to live parts . 23
9 Starting of motor-operated appliances . 23
10 Power input and current . 23
11 Heating . 23
12 Void . 29
13 Leakage current and electric strength at operating temperature . 29
14 Transient overvoltages . 29
15 Moisture resistance . 29
16 Leakage current and electric strength . 30
17 Overload protection of transformers and associated circuits . 31
18 Endurance . 31
19 Abnormal operation . 31
20 Stability and mechanical hazards . 36
21 Mechanical strength . 36
22 Construction . 36
23 Internal wiring . 46
24 Components . 46
25 Supply connection and external flexible cords . 47
26 Terminals for external conductors . 47
27 Provision for earthing . 47
28 Screws and connections . 47
29 Clearances, creepage distances and solid insulation . 48
30 Resistance to heat and fire . 48
31 Resistance to rusting . 48
32 Radiation, toxicity and similar hazards . 48
Annexes . 54
Annex D (normative) Thermal motor protectors . 54
Annex I (normative) Motors having basic insulation that is inadequate for the rated
voltage of the appliance . 54
Annex AA (informative) Examples for operating temperatures of the appliance . 55
Annex BB (normative) Selected information about refrigerants . 56
Annex CC (informative) Transportation, marking and storage for units that employ
flammable refrigerants . 58
Annex DD (normative) Requirements for operation, service and installation manuals of
appliances using flammable refrigerants . 59
Annex EE (normative) Pressure tests . 68
Annex FF (normative) Leak simulation tests . 71
Annex GG (normative) Charge limits, ventilation requirements and requirements for
secondary circuits . 73
Annex HH (informative) Competence of service personnel . 99
Annex II (Void) . 102
Annex JJ (normative) Allowable opening of relays and similar components to prevent
ignition of A2L refrigerants . 103
Annex KK (normative) Test method for hot surface ignition temperature for A2L . 105
Annex LL (normative) Refrigerant detection systems for A2L refrigerants . 109
Annex MM (normative) Refrigerant sensor location confirmation test . 111
Annex NN (normative) Flame arrest enclosure verification test for A2L refrigerants . 113
Annex OO (normative) UV radiation conditioning . 115
Bibliography . 116
Figure 101 – Example of label for field charged units . 50
Figure 102 – Arrangement for heating test of appliances with supplementary heater . 52
Figure 103 – Supply circuit for locked-rotor test of a motor of the single-phase type –
Revise as needed for three-phase test . 53
Figure GG.1 – Unventilated area. 95
Figure GG.2 – Mechanical ventilation . 96
Figure GG.3 – Isosceles triangle arrow test gauge . 96
Figure GG.4 – Measurement of vibration amplitude. 96
Figure GG.5 – Relevant heights h , h and h for calculation of A and m . 97
inst 0 rel min max
Figure GG.6 – Airflow direction . 98
Figure KK.1 – Front view of test apparatus labels . 105
Figure KK.2 – Test apparatu
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