IEC 60034-22:2009

IEC 60034-22 ®
Edition 2.0 2009-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 22: AC generators for reciprocating internal combustion (RIC) engine driven
generating sets
Machines électriques tournantes –
Partie 22: Génératrices à courant alternatif pour groupes électrogènes entraînés
par un moteur à combustion interne

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IEC 60034-22 ®
Edition 2.0 2009-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 22: AC generators for reciprocating internal combustion (RIC) engine driven
generating sets
Machines électriques tournantes –
Partie 22: Génératrices à courant alternatif pour groupes électrogènes entraînés
par un moteur à combustion interne

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
R
CODE PRIX
ICS 29.160 ISBN 978-2-88910-020-0
– 2 – 60034-22 © IEC:2009
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references.5
3 Terms and definitions .5
4 Rating.9
5 Limits of temperature and temperature rise .10
5.1 Base continuous rating .10
5.2 Peak continuous rating .10
6 Parallel operation.10
6.1 General .10
6.2 Effect of electromechanical vibration and its frequency.11
7 Special load conditions .11
7.1 General .11
7.2 Unbalanced load current .11
7.3 Sustained short-circuit current (see also 8.3) .11
7.4 Occasional excess current capability.11
7.5 Total harmonic distortion (THD) .11
7.6 Radio interference suppression.12
8 Asynchronous generators with excitation equipment.12
8.1 General .12
8.2 Rated speed and rated slip .12
8.3 Sustained short-circuit current .12
8.4 Range of voltage setting (see also 3.9) .12
8.5 Parallel operation (see also Clause 6).12
9 Operating limit values .12
10 Rating plate .13
Annex A (informative) AC generator transient voltage characteristic following a sudden
change in load .15
Bibliography .20

Figure A.1 – Generator transient voltage versus time for sudden load application and
removal: r.m.s. voltage versus time .17
Figure A.2 – Generator transient voltage versus time for sudden load applications:
instantaneous voltage versus time.18
Figure A.3 – Performance curves (step loading) (cos φ ≤ 0,4) .19

Table 1 − Operating limit values .13

60034-22 © IEC:2009 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –

Part 22: AC generators for reciprocating internal combustion (RIC)
engine driven generating sets
FOREWORD
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International Standard IEC 60034-22 has been prepared by IEC technical committee 2:
Rotating machinery.
This second edition cancels and replaces the first edition published in 1996 and constitutes a
technical revision.
The technical changes with regard to the previous edition include:
– Clause 2: The standards which were not referenced in the text have been deleted.
– Clause 3: Technical and editorial changes to many of the definitions have been made.
– Clause 4: In the NOTE, the quantity T has been replaced by TL.

L
– Clause 7: Technical and editorial changes to many clauses have been made.
– Clause 9: Table 1 has been revised.
– Annex A: This annex has been revised.

– 4 – 60034-22 © IEC:2009
The text of this standard is based on the following documents:
FDIS Report on voting
2/1568/FDIS 2/1573/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all parts of IEC 60034 series, under the general title, Rotating electrical machines, can
be found on the IEC website.
NOTE A table of cross-references of all IEC TC 2 publications can be found in the IEC TC 2 dashboard on the IEC
website.
The committee has decided that the contents of this publication will remain unchanged until the
maintenance result date indicated on the IEC web site under "http://webstore.iec.ch"
...