EN 60034-22:1997

SLOVENSKI STANDARD
01-april-1999
Rotating electrical machines - Part 22: AC generators for reciprocating internal
combustion (RIC) engine driven generating sets (IEC 60034-22:1996)
Rotating electrical machines -- Part 22: AC generators for reciprocating internal
combustion (RIC) engine driven generating sets
Drehende elektrische Maschinen -- Teil 22: Wechselstromgeneratoren für
Stromerzeugungsaggregate mit Hubkolben-Verbrennungsmotoren
Machines électriques tournantes -- Partie 22: Génératrices à courant alternatif pour
moteurs à combustion interne et à pistons
Ta slovenski standard je istoveten z: EN 60034-22:1997
ICS:
27.020 Motorji z notranjim Internal combustion engines
zgorevanjem
29.160.40 (OHNWULþQLDJUHJDWL Generating sets
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

NORME
CEI
INTERNATIONALE
IEC
34-22
INTERNATIONAL
Première édition
STANDARD
First edition
1996-11
Machines électriques tournantes –
Partie 22:
Génératrices à courant alternatif
pour moteurs à combustion interne
et à pistons
Rotating electrical machines –
Part 22:
AC generators for reciprocating internal
combustion (RIC) engine driven
generating sets
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34-22  IEC:1996 − 3 −
CONTENTS
Page
FOREWORD . 5
Clause
1 Scope. 7
2 Normative references . 7
3 Definitions . 9
3.1 Rated power and speed . 9
3.2 Voltage terms . 11
3.3 Voltage regulation characteristics. 15
4 Rating . 15
5 Limits of temperature and temperature rise . 17
6 Parallel operation . 17
6.1 General . 17
6.2 Effect of electromechanical vibration and its frequency. 19
7 Special load conditions . 19
7.1 General . 19
7.2 Unbalanced current . 19
7.3 Sustained short-circuit current . 21
7.4 Occasional excess current capability. 21
7.5 Telephone harmonic factor (THF). 21
7.6 Radio interference suppression. 21
8 Asynchronous generators with excitation equipment. 21
8.1 General . 21
8.2 Rated speed and rated slip . 21
8.3 Sustained short-circuit current . 21
8.4 Range of voltage setting . 21
8.5 Parallel operation . 23
9 Operating limit values . 23
10 Rating plate. 25
Annexe A − AC generator transient voltage characteristic following a sudden change
in load. 27

34-22  IEC:1996 − 5 −
INTERNATIONAL ELECTROTECHNICAL COMMISSION
_____________
ROTATING ELECTRICAL MACHINES –
Part 22: AC generators for reciprocating internal combustion (RIC)
engine driven generating sets
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization
comprising all national electrotechnical committees (IEC National Committees). The object of the 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, the IEC publishes International Standards. 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 with the IEC also participate in this preparation. The IEC collaborates closely with the International
Organization for Standardization (ISO) in accordance with conditions determined by agreement between the
two organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the
form of standards, technical reports or guides and they are accepted by the National Committees in that
sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the
subject of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
International standard IEC 34-22 has been prepared by IEC technical committee 2: Rotating
machinery.
The text of this standard is based on the following documents:
FDIS Report on voting
2/943/FDIS 2/971/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.
Annex A is for information only.

34-22  IEC:1996 − 7 −
ROTATING ELECTRICAL MACHINES –
Part 22: AC generators for reciprocating internal combustion (RIC)
engine driven generating sets
1 Scope
This part of IEC 34 establishes the principal characteristics of a.c. generators under the control
of their voltage regulators when used for reciprocating internal combustion (RIC) engine driven
generating set applications and supplements the requirements given in IEC 34-1. It covers the
use of such generators for land and marine use, but excludes generating sets used on aircraft
or used to propel land vehicles and locomotives.
NOTES
1 For some specific applications (e.g. essential hospital supplies, high-rise buildings, etc.) supplementary
requirements may be necessary. The provisions of this standard should be regarded as a basis for such
requirements.
2 Attention is drawn to the need to take note of additional regulations or requirements imposed by various
regulatory bodies. Such regulations or requirements may form the subject of agreement between the customer
and the manufacturer when conditions of use of the end product invoke such requirements.
3 Examples of regulatory authorities:
− classification societies, for generating sets used on ships and offshore installations;
− government agencies;
− inspection agencies, local utilities, etc.
Annex A discusses the behaviour of generators covered by this standard when subjected to
sudden load changes.
2 Normative references
The following normative documents contain provisions which, through reference in this text,
constitute provisions of this part of IEC 34. At the time of publication, the editions indicated
were valid. All normative documents are subject to revision, and parties to agreements based
on this part of IEC 34 are encouraged to investigate the possibility of applying the most recent
editions of the normative documents indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
IEC 27, Letter symbols to be used in electrical technology
IEC 27-1: 1992, Letter symbols to be used in electrical technology − Part 1: General
IEC 27-4: 1985, Letter symbols to be used in electrical technology − Part 4: Symbols for
quantities to be used for rotating electrical machines

34-22  IEC:1996 − 9 −
IEC 34-1: 1996, Rotating electrical machines − Part 1: Rating and performance
IEC 85: 1984, Thermal evaluation and classification of electrical insulation
CISPR 14: 1993, Limits and methods of measurement of radio disturbance characteristics of
electric motor-operated and thermal appliances for household and similar purposes, electric
tools and similar electrical apparatus
CISPR 15: 1992, Limits and methods of measurement of radio disturbance characteristics of
electrical lighting and similar equipment
ISO 8528-1: 1993, Reciprocating internal combustion engine driven alternating current
generating sets – Part 1: Application, ratings and performance
3 Definitions
For the purpose of this part of IEC 34, the following definitions apply.
NOTE – In this standard, suffix ‘N’ is used for ‘rated’ in accordance with IEC 27 whereas in ISO 8528, suffix ‘r’
is so used.
3.1 Rated power and speed
3.1.1 rated output S : The product of the rated r.m.s. voltage, the rated r.m.s. current and a
N
constant m, expressed in volt-amperes (VA) or its decimal multiples,
where
m = 1 for single-phase;
m = 2 for two-phase;
m = 3 for three-phase.
3.1.2 rated active power P : The product of the rated r.m.s. voltage, the in-phase
N
component of the rated r.m.s. current and a constant m, expressed in watts (W) or its decimal
multiples,
where
m = 1 for single-phase;
2 for two-phase;
m =
m = 3 for three-phase.
3.1.3 rated power factor cos φ : The ratio of the rated active power to the rated apparent
N
power,
P
N
cosφ=
N
S
N
34-22  IEC:1996 − 11 −
3.1.4 rated reactive power Q : The geometrical difference of the rated apparent power and
N
the rated active power expressed in volt-amperes reactive (VAr) or its decimal multiples,
2 2
Q=−SP
()
NN N
3.1.5  rated speed of rotation n :
N
a) synchronous generator: The speed of rotation necessary for voltage generation at rated
frequency,
f
N
n =
N
p
where
p is the number of pole pairs;
f is the rated frequency (according to load requirements).
N
b) asynchronous generator: The speed of rotation required to generate rated output at
rated frequency,
f
N
n=−()1s
N N
p
where
p is the number of pole pairs;
f is the rated frequency (according to load requirements);
N
s is the rated slip.
N
3.1.6 rated slip (of an asynchronous generator) s : The difference between the
N
synchronous speed and the rated speed of the rotor divided by the synchronous speed, when
the generating set is giving its rated active power,
f
N
− n
N
p
s =
N
f
N
p
3.2  Voltage terms
NOTE – These terms relate to a generator running at constant (rated) speed under the control of the normal
excitation and voltage control system.
3.2.1 rated voltage U : The line-to-line voltage at the terminals of the generator at rated
N
frequency and rated output.
NOTE – Rated voltage is the voltage assigned by the manufacturer for operating and performance
characteristics.
3.2.2 no-load voltage U : The line-to-line voltage at the terminals of the generator at rated
nl
frequency and no-load.
34-22  IEC:1996 − 13 −
3.2.3 range of voltage setting ΔU : The range of possible upward and downward
s
adjustment of voltage at generator terminals (ΔU and ΔU , where U is the upper limit of
sup sdo sup
voltage setting and U is the lower limit of voltage setting) at rated frequency, for all loads
sdo
between no-load and rated output.
ΔU = ΔU + ΔU
s sup sdo
The voltage setting range is expressed as a percentage of the rated voltage.
U
a) Upward range, Δ
sup
UU−
sup N
ΔU = × 100
sup
U
N
b) Downward range, ΔU
sdo
UU−
sdo N
ΔU = × 100
sdo
U
N
...