IEC 60034-12:2002

IEC 60034-12
Edition 2.1 2007-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 12: Starting performance of single-speed three-phase cage induction
motors
Machines électriques tournantes –
Partie 12: Caractéristiques de démarrage des moteurs triphasés à induction
à cage à une seule vitesse
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IEC 60034-12
Edition 2.1 2007-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Rotating electrical machines –
Part 12: Starting performance of single-speed three-phase cage induction
motors
Machines électriques tournantes –
Partie 12: Caractéristiques de démarrage des moteurs triphasés à induction
à cage à une seule vitesse
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CC
CODE PRIX
ICS 29.160.30 ISBN 2-8318-9235-X

– 2 – 60034-12 © IEC:2002+A1:2007
CONTENTS
FOREWORD.3
1 Scope.5
2 Normative references.5
3 Definitions.6
4 Symbols.6
5 Designation.7
5.1 General.7
5.2 Design N.7
5.3 Design NY.7
5.4 Design H.7
5.5 Design HY.7
6 Design N requirements .7
6.1 Torque characteristics.7
6.2 Locked rotor apparent power .7
6.3 Starting requirements .8
7 Design NY starting requirements .8
8 Design H requirements .8
8.1 Starting torque.8
8.2 Locked rotor apparent power .8
8.3 Starting requirements .8
9 Design HY requirements starting requirements.9

Table 1 – Minimum values of torques for design N .9
Table 2 – Maximum values of locked rotor apparent power for designs N and H .9
Table 3 – External inertia (J) .10
Table 4 – Minimum values of torques for design H .11
Table 5 – Minimum values of torques for design N-e motors
with type of protection 'e – increased safety' .11
Table 6 – Maximum values of locked rotor apparent power
for motors with type of protection 'e'.12
Table 7 – External inertia (J) for motors with type of protection 'e'.12

60034-12 © IEC:2002+A1:2007 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –

Part 12: Starting performance of single-speed
three-phase cage induction motors

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
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International Standard IEC 60034-12 has been prepared by IEC technical committee 2:
Rotating machinery.
This consolidated version of IEC 60034-12 consists of the second edition (2002) [documents
2/1187/FDIS and 2/1199/RVD] and its amendment 1 (2007) [documents 2/1433/FDIS and
2/1446/RVD].
The technical content is therefore identical to the base edition and its amendment(s) and has
been prepared for user convenience.
It bears the edition number 2.1.
A vertical line in the margin shows where the base publication has been modified by
amendment 1.
– 4 – 60034-12 © IEC:2002+A1:2007
The committee has decided that the contents of the base publication and its amendments will
remain unchanged until the maintenance result date indicated on the IEC web site under
"http://webstore.iec.ch" in the data related to the specific publication. At this date,
the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
60034-12 © IEC:2002+A1:2007 – 5 –
ROTATING ELECTRICAL MACHINES –

Part 12: Starting performance of single-speed
three-phase cage induction motors

1 Scope
This International standard specifies the parameters for four designs of starting performance
of single-speed three-phase 50 Hz or 60 Hz cage induction motors in accordance with
IEC 60034-1 that:
• have a rated voltage up to 1 000 V;
• are intended for direct-on-line or star-delta starting;
• are rated on the basis of duty type S1;
• are constructed to any degree of protection.
The standard also applies to dual voltage motors provided that the flux saturation level is the
same for both voltages and to motors having type of protection 'e – increased safety' with
temperature classes T1 to T3 complying with IEC 60079-0 and IEC 60079-7.
NOTE 1 It is not expected that all manufacturers will produce machines for all four designs. The selection of any
specific design in accordance with this standard will be a matter of agreement between the manufacturer and the
purchaser.
NOTE 2 Designs other than the four specified may be necessary for particular applications.
NOTE 3 The values of torque and apparent power given in this standard are limiting values (that is, minimum or
maximum without tolerance), but it should be noted that values given in manufacturers' catalogues may include
tolerances in accordance w
...