IEC 60034-12:2016

IEC 60034-12 ®
Edition 3.0 2016-11
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 3.0 2016-11
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
INTERNATIONALE
ICS 29.160.01 ISBN 978-2-8322-3768-7

− 2 − IEC 60034-12:2016  IEC 2016
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Symbols . 7
5 Designation . 7
5.1 General . 7
5.2 Design N . 7
5.3 Design NE . 7
5.4 Designs NY and NEY . 7
5.5 Design H . 7
5.6 Design HE . 8
5.7 Designs HY and HEY . 8
6 Design N requirements . 8
6.1 Torque characteristics . 8
6.2 Locked rotor current and apparent power . 8
6.3 Starting requirements . 8
7 Design NE starting requirements . 9
8 Designs NY and NEY starting requirements . 9
9 Design H requirements . 9
9.1 Starting torque . 9
9.2 Locked rotor current and apparent power . 9
9.3 Starting requirements . 9
10 Design HE starting requirements . 10
11 Designs HY and HEY starting requirements . 10

Table 1 – Minimum values of torques for design N . 10
Table 2 – Maximum values of locked rotor apparent power for designs N and H . 11
Table 3 – Maximum values of locked rotor apparent power for designs NE and HE . 11
Table 4 – External moment of inertia (J) . 12
Table 5 – Minimum values of torques for design H . 13
Table 6 – Minimum values of torques for design N motors with type of protection 'Ex
eb – increased safety' . 13
Table 7 – External moment of inertia (J) for motors with type of protection 'Ex eb –
increased safety' . 14

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –

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

FOREWORD
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International Standard IEC 60034-12 has been prepared by IEC technical committee 2:
Rotating machinery.
This third edition cancels and replaces the second edition, published in 2002, and its
amendment 1, published in 2007. It constitutes a technical revision.

− 4 − IEC 60034-12:2016  IEC 2016
The main technical changes with regard to the previous edition are as follows:
Clause or
...