IEC 63078:2019

IEC 63078 ®
Edition 1.0 2019-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Installations for electroheating and electromagnetic processing – Test methods
for induction through-heating installations

Installations pour traitement électrothermique et électromagnétique – Méthodes
d'essai pour les installations de chauffage par induction

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IEC 63078 ®
Edition 1.0 2019-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Installations for electroheating and electromagnetic processing – Test methods

for induction through-heating installations

Installations pour traitement électrothermique et électromagnétique – Méthodes

d'essai pour les installations de chauffage par induction

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 25.180.10 ISBN 978-2-8322-7583-2

– 2 – IEC 63078:2019 © IEC 2019
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 7
4 Basic provisions for testing and test conditions . 11
5 Comparing equipment or installations . 13
6 Measurements and workloads . 13
7 Numerical modelling . 14
8 List of tests . 14
9 Technical tests and efficiency of the installation . 15
Annex A (informative) Energy efficiency assessment . 19
Annex B (informative) Visual display of energy efficiency related information . 20
Annex C (informative) Estimating energy use . 21
Annex D (informative) Energy recoverability . 22
Annex AA (normative) Explanatory diagrams for symbols and definitions relating to the
power circuit of induction through-heating equipment . 23
Annex BB (informative) List of symbols used in this document . 27
Annex CC (normative) Determination of billet temperature homogeneity Δθ . 29
b
Annex DD (informative) Methods for safety tests . 34
Bibliography . 35

Figure AA.1 – Basic power circuit of the induction through-heating equipment . 23
Figure AA.2 – Power circuit of the induction through-heating equipment having one
rectifier transformer as well as several semiconductor frequency converters and
compensated circuits/loads . 24
Figure AA.3 – Power circuit of the induction through-heating equipment having one
rectifier transformer, one rectifier as well as several series type inverters and
compensated circuits/loads . 25
Figure AA.4 – Examples of compensated circuits . 26

Table CC.1 – Arrangement of temperature measuring points of the billets . 31

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
INSTALLATIONS FOR ELECTROHEATING AND ELECTROMAGNETIC
PROCESSING – TEST METHODS FOR INDUCTION
THROUGH-HEATING INSTALLATIONS
FOREWORD
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International Standard IEC 63078 has been prepared by IEC technical committee 27:
Industrial electroheating and electromagnetic processing.
The text of this International Standard is based on the following documents:
FDIS Report on voting
27/1118/FDIS 27/1119/RVD
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.
This International Standard is to be used in conjunction with IEC 60398:2015.

– 4 – IEC 63078:2019 © IEC 2019
The clauses of this document supplement, modify or replace clauses of IEC 60398. When this
document states “addition”, "modification" or “replacement”, the relevant text in IEC 60398 is
to be adapted accordingly.
Subclauses which are additional to those in IEC 60398 are numbered starting from 101.
Additional annexes are numbered AA, BB, etc.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC web site 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.
INTRODUCTION
Induction through-heating and induction melting are very important applications of induction
heating. However, an induction through-heating installation is more complex than an induction
melting furnace, as it includes more heating mann
...