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BS EN IEC 60519-6:2024

BS EN IEC 60519-6:2024

$215.11

Safety in installations for electroheating and electromagnetic processing – Particular requirements for high frequency dielectric and microwave heating and processing equipment

Published By Publication Date Number of Pages
BSI 2024 72
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This part of IEC 60519 is applicable to equipment using high frequency or microwave energy alone or in combination with other kinds of energy for industrial heating and processing of materials. It is also applicable to HF and MW generators made available to users as separate units. This part is applicable to equipment operating in the frequency range 3 MHz to 300 GHz, with the following limitations. – This document applies to only high frequency dielectric heating and processing as defined in 3.1.103. It does not apply to induction heating, which it is possible to carry out in the lower part of the specified frequency band and is covered by IEC 60519-3, with magnetic field safety aspects addressed in IEC TS 62997:2017, the latter to be replaced by a technical report (TR) or by a revised technical specification (TS). – The ISM centre frequencies for dielectric heating and processing of industrial interest are narrow bands about 6,78 MHz, 13,56 MHz, 27,12 MHz and 40,68 MHz. Different field emission measurement procedures and limiting values are applicable, depending on the processing frequency in the high frequency range 3 to 300 MHz. Specifications are in Annex BB. – This document specifies limits for microwave emission only for the ISM frequencies between 800 MHz and 6 MHz, as specified in Annex CC. For other microwave frequencies the basic restriction and IEC 62311 apply. – The foundations for compliance with emission values are the basic restrictions, referred to in the IEEE/ANSI C95.1:2019 and Directive 2013/35/EU. However, maximum HF processing frequency electric and magnetic field values are taken from the IEEE/ANSI C95.1:2019 standard, as indicated in Annex BB. – This document is not applicable to: — appliances for household and similar use (covered by e.g. IEC 60335-2-25); — commercial use (covered by IEC 60335-2-90 and IEC 60335-2-110); — laboratory use (covered by IEC 61010-2-010); — medical high frequency equipment and accessories (covered by IEC 60601-2-2). NOTE 101 Since high frequency and microwave tunnel ovens and also some other types of microwave and high frequency equipment are sometimes intended either for commercial, laboratory or industrial use, the following criteria are suitable for determination of the classification as industrial equipment: – commercial equipment is typically designed and planned for series production of many identical units, whereas industrial equipment is typically produced in small series or even as single units. The processed goods are consumed or ready for final use at the end of the heating process. – laboratory heating equipment is for preparing material in a laboratory environment, and the processed material is immediately available for investigations or further processing. Regular production of large quantities of material is not foreseen. – with industrial equipment, the processed goods are not immediately accessible to the end user, and the goods are sometimes not in a final state from the perspective of the end user.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Annex ZA (normative)Normative references to international publicationswith their corresponding European publications
6 English
CONTENTS
8 FOREWORD
11 INTRODUCTION
12 1 Scope
13 2 Normative references
3 Terms and definitions
3.1 General concepts
15 3.2 Equipment and state of equipment
17 3.3 Parts and accessories
4 Classification and subdivision of equipment and installations
4.1 Classification by processing frequency
18 5 Risk assessment
6 General provisions
19 7 Protection against hazards from electric shock
21 8 Protection against hazards from electric or magnetic fields
24 9 Protection against hazards from radiation
25 10 Protection against hazards from thermal influences
11 Protection against hazards from fire
Table 101 – Dimensional requirements for HF/MW barriers
26 12 Protection against hazards from fluids
13 Specific requirements for components and subassemblies
14 Control of the installation or equipment
27 15 Protection against mechanical hazards
16 Protection against hazards resulting from use
17 EMC
18 Verification and testing
19 Information for use
28 Annex A (normative)List of significant hazards
29 Annex B (normative)Limits to touch currents
30 Annex C (normative)Non coherent optical radiation – Limits and risk classes
31 Annex D (normative)Electric and magnetic fields
32 Annex E (normative)Surface temperature limits
33 Annex F (normative)EH, EPM and fire
34 Annex G (normative)Marking and warning
35 Annex H (informative)Guidelines on using this document
36 Annex I (informative)Connection with ISO 13577 (all parts)
37 Annex J (informative)Requirements specific to the EU and associated countries
38 Annex AA (normative)Information for use
AA.1 General
AA.2 Labelling
39 Figures
Figure AA.1 – Examples of warning sign and labels
Figure AA.2 – Labels at open HF applicators and handheld or open MW applicators
41 Annex BB (normative)Measurements and evaluations of the high frequencyemission and contact current
BB.1 General
BB.2 Conditions of equipment operation for measurements
BB.3 Evaluation of the HF field characteristics
42 BB.4 Electric, magnetic fields, and contact currents
BB.4.1 Electric and magnetic field measurements
BB.4.2 Evaluations of |E|/|H|
BB.4.3 Measurements of contact currents
43 BB.5 Limiting values, continuous energising of the processing frequency source
BB.6 Limiting values, intermittent energising of the processing frequency source
BB.7 Relaxation for processing frequencies up to 41 MHz
44 BB.8 Risk classes
BB.9 Instrumentation
BB.9.1 General
BB.9.2 Instruments to be used by manufacturers
BB.9.3 Minimum specifications
45 BB.9.4 Explanatory figures
46 Figure BB.1 – Large HF barrier for a conveyorised heating equipment scenario
47 Figure BB.2 – Conditions for a HF plastic welding equipment
48 Annex CC (normative)Measurements and evaluations of the microwave emission
CC.1 Conditions for measurement
CC.2 Measurement details
CC.3 Risk classes
49 CC.4 Instrumentation
CC.4.1 Primary instrumentation
CC.4.2 Microwave leakage instrument minimum specifications
50 Figure CC.1 – Large barrier for conveyorised microwave heating equipment
51 Figure CC.2 – Small microwave access barrier for conveyorisedmicrowave heating equipment
52 Figure CC.3 – Vertical-only MW barriers for conveyorised microwave heating equipment
53 Annex DD (informative)Rationales for the high frequency emission limits and measurements
DD.1 The biological effects of HF emissions from 3 MHz to 300 MHz
DD.2 Today’s agreed limits for operator safety
DD.2.1 Exposure to fields
54 DD.2.2 Contact currents
DD.3 Differences between the concepts in the cited standards and this document
55 DD.4 Field behaviour
DD.4.1 General
56 DD.4.2 Rationales for numerical modelling
DD.4.3 Modelling scenarios
57 DD.4.4 External E and H field patterns and coupling phenomena
Figure DD.1 – The overall complete scenario (left) with details
59 Figure DD.2 – Field maxima with linear scaling (six top images)and decibel scaling (six bottom images)
60 DD.4.5 Absolute E field values in relation to internal power densities (SAR)
Figure DD.3 – Quiver plots of momentary total fields at the same time phase
61 DD.4.6 Discussion – induced currents
Figure DD.4 – Power density patterns in the body-partsreceiving the highest exposure values
62 DD.4.7 Discussion – low SAR value in the hand in the extremely high E field
DD.4.8 Discussion – relationships between external E and SAR values at 30 MHz
Figure DD.5 – E field comparisons 30/100 MHz, and 100 MHz field polarisation
63 DD.4.9 Comparative E nearfield absorption for other frequencies up to 100 MHz
DD.4.10 Modelling under plane wave propagation conditions
Figure DD.6 – SAR maxima at 100 MHz in the scenario with only the body present
64 DD.5 Conclusions
DD.5.1 Distance between accessible metal parts and the E field probe
Table DD.1 – Maximum power densities in circularly cylindrical muscle objects irradiated by 100 MHz plane waves with the E field parallel to the axis
65 DD.5.2 The magnetic field and bodycurrent measurements
DD.5.3 The highest SAR and ankle current values
DD.5.4 E fields from dielectric heating and processing equipment compared to plane wave irradiation
66 Annex EE (informative)Rationales for the microwave barrier andassociated microwave leakage tests
EE.1 Standard measurement of microwave emission
67 EE.2 Microwave hazards – SAR basic restriction
EE.3 Microwave hazard evaluation – free space exposure method
68 EE.4 Microwave hazards from openings in cavities, and from exit and entrance ports
69 EE.5 Time averaging
70 EE.6 Conclusions and modifications of the standards for ovens with a cavity door
71 Bibliography

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