prEN IEC 61307:2025

SLOVENSKI STANDARD
01-julij-2025
Industrijske inštalacije za mikrovalovno segrevanje - Preskusne metode za
ugotavljanje izhodne moči
Industrial microwave heating installations - Test methods for the determination of power
output
Industrielle Mikrowellen-Erwärmungsanlagen - Messverfahren für die Bestimmung der
Ausgangsleistung
Installations industrielles de chauffage par micro-ondes - Méthodes d'essai pour la
détermination de la puissance de sortie
Ta slovenski standard je istoveten z: prEN IEC 61307:2025
ICS:
25.180.10 Električne peči Electric furnaces
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

27/1206/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 61307 ED4
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2025-06-13 2025-09-05
SUPERSEDES DOCUMENTS:
27/1200/CD, 27/1203/CC
IEC TC 27 : INDUSTRIAL ELECTROHEATING AND ELECTROMAGNETIC PROCESSING
SECRETARIAT: SECRETARY:
Poland Mrs Mariola Nowecka
OF INTEREST TO THE FOLLOWING COMMITTEES: HORIZONTAL FUNCTION(S):

ASPECTS CONCERNED:
SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for
Vote (CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they
are aware and to provide supporting documentation.
Recipients of this document are invited to submit, with their comments, notification of any relevant “In Some Countries”
clauses to be included should this proposal proceed. Recipients are reminded that the CDV stage is the final stage for
submitting ISC clauses. (SEE AC/22/2007 OR NEW GUIDANCE DOC).

TITLE:
Industrial microwave heating installations - Test methods for the determination of power output

PROPOSED STABILITY DATE: 2030
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
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IEC 61307 ED4 © IEC 2025 2
1 CONTENTS
3 FOREWORD . 3
4 1 Scope . 5
5 2 Normative references . 5
6 3 Terms and definitions . 5
7 4 Methods of microwave power measurements . 9
8 4.1 General . 9
9 4.2 Workload power . 9
10 4.3 Effective microwave power and efficiency . 9
11 5 Calorimetric power measurements of available microwave power . 10
12 5.1 General . 10
13 5.2 Direct liquid water power measurements . 10
14 5.3 Drying of substitute loads . 10
15 6 Dummy load power measurements . 11
16 7 Determination of effective microwave power with individual load items. 11
17 7.1 General . 11
18 7.2 The open container water test . 11
19 7.3 Tests with drying workload . 12
20 8 Electrical efficiency . 12
21 8.1 Available microwave power output. 12
22 8.2 Electrical input . 12
23 9 Cold Start, Standby and Holding Power Consumption . 13
24 9.1 General . 13
25 9.2 Some aspects . 13
26 Annex A Equipment class . 14
27 A.1 Type A equipment . 14
28 A.2 Type B equipment . 14
29 Bibliography . 15
IEC 61307 ED4 © IEC 2025 3
33 INTERNATIONAL ELECTROTECHNICAL COMMISSION
34 ____________
36 INDUSTRIAL MICROWAVE HEATING INSTALLATIONS –
37 TEST METHODS FOR THE DETERMINATION
38 OF POWER OUTPUT
41 FOREWORD
42 1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising all national
43 electrotechnical committees (IEC National Committees). The object of IEC is to promote international co-operation on all
44 questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities,
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47 National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental
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49 the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between
50 the two organizations.
51 2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international consensus
52 of opinion on the relevant subjects since each technical committee has representation from all interested IEC National
53 Committees.
54 3) IEC Publications have the form of recommendations for international use and are accepted by IEC National Committees in
55 that sense. While all reasonable efforts are made to ensure that the technical content of IEC Publications is accurate, IEC
56 cannot be held responsible for the way in which they are used or for any misinterpretation by any end user.
57 4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications transparently to
58 the maximum extent possible in their national and regional publications. Any divergence between any IEC Publication and
59 the corresponding national or regional publication shall be clearly indicated in the latter.
60 5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity assessment
61 services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any services carried out by
62 independent certification bodies.
63 6) All users should ensure that they have the latest edition of this publication.
64 7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and members of
65 its technical committees and IEC National Committees for any personal injury, property damage or other damage of any
66 nature whatsoever, whether direct or indirect, or for costs (including legal fees) and expenses arising out of the publication,
67 use of, or reliance upon, this IEC Publication or any other IEC Publications.
68 8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is indispensable
69 for the correct application of this publication.
70 9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent rights.
71 IEC shall not be held responsible for identifying any or all such patent rights.
72 International Standard IEC 61307 has been prepared by IEC technical committee 27: Industrial
73 electroheating.
74 This fourth edition cancels and replaces the second edition published in 2011. It constitutes a technical
75 revision.
76 This edition includes the following significant technical changes with respect to the previous edition:
77 a) it covers not only the standby and hibernation modes, but also start-up, standby and holding power
78 consumption, as well as other aspects of operation flexibility;
79 b) more detailed descriptions of the aspects of microwave power, and handling of the A and B types of
80 equipment.
IEC 61307 ED4 © IEC 2025 4
82 The text of this standard is based on the following documents:
CDV Report on voting
27/XXXX/CDV 27YYYY/RVC
84 Full information on the voting for the approval of this standard can be found in the report on voting
85 indicated in the above table.
86 This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
87 The committee has decided that the contents of this publication will remain unchanged until the stability
88 date indicated on the IEC web site under "http://webstore.iec.ch" in the data related to the specific
89 publication. At this date, the publication will be
90 • reconfirmed,
91 • withdrawn,
92 • replaced by a revised edition, or
93 • amended.
IEC 61307 ED4 © IEC 2025 5
95 INDUSTRIAL MICROWAVE HEATING INSTALLATIONS –
96 TEST METHODS FOR THE DETERMINATION
97 OF POWER OUTPUT, EFFICIENCY AND OPERATIONAL FLEXIBILITY
101 1 Scope
102 This document specifies test methods for the determination of the efficiency of frequency conversion
103 from the electrical input, and of the available and workload microwave output power in industrial
104 microwave heating installations, as well as operational flexibility.
105 This document is in principle applicable to industrial microwave heating equipment and installations in
106 the frequency range from 300 MHz to 300 GHz but focussed on the microwave ISM frequencies below
107 6 GHz.
108 This document relates to industrial microwave heating equipment operating as intended by the
109 manufacturer’s specifications for normal operation.
110 This document does not apply to appliances for household and similar use (covered by
111 IEC 60335-2-25:2019), commercial use (covered by IEC 60335-2-90:2015 and IEC 60335-110:2024) or
112 laboratory use (covered by IEC 161010-2-010:2019).
113 2 Normative references
114 The following referenced documents are indispensable for the application of this document. For dated
115 references, only the edition cited applies. For undated references, the latest edition of the referenced
116 document (including any amendments) applies.
117 IEC 60050-841:2004, International Electrotechnical Vocabulary – Part 841: Industrial Electroheat
118 NOTE Since chapter 841 in IEV is under revision, no references to the 2004 version are given in this standard.
119 IEC 60050-726:1982, International Electrotechnical Vocabulary – Chapter 726: Transmission lines and
120 waveguides
121 IEC 60519-6:2022, Safety in installations for electroheating and electromagnetic processing - Part 6:
122 Particular requirements for high frequency dielectric and microwave heating and processing equipment
123 IEC 60398:2015, Installations for electroheating and electromagnetic processing – General
124 performance test methods
126 3 Terms and definitions
127 For the purposes of this document, the terms and definitions of IEC 60519-6 and IEC 60050-841 as well
128 as the following applies.
129 NOTE: Some terms have the same or similar definitions in IEC 60050 (IEV). If different, those in this standard apply.
130 3.1
131 microwave heating equipment
132 assembly of electrical and mechanical devices intended for the transfer of microwave energy to the
133 workload and comprising in general, power supplies, microwave generators or microwave generator
134 assemblies with cooling arrangements and circulators if used, microwave applicators or cavities with
135 ventilation arrangements if used, interconnecting cables and waveguides, control circuitry, and means
136 for transporting the workload if used.

IEC 61307 ED4 © IEC 2025 6
137 3.2
138 equipment class
139 group within a type of equipment, using the same principle for processing of the workload
140 either type A or type B (see Annex A).
142 Note 1 to entry: An example of type is microwave equipment and a class example is such equipment
143 for wood drying heating in a specified capacity interval using the ISM frequency 2,45 GHz.
145 3.3
146 type A equipment
147 equipment with the microwave generator (frequency
...