EN IEC 60034-2-1:2024

SLOVENSKI STANDARD
oSIST prEN IEC 60034-2-1:2023
01-januar-2023
Električni rotacijski stroji - 2-1. del: Standardne metode za ugotavljanje izgub in
izkoristka s preskušanjem (razen strojev za vlečna vozila)
Rotating electrical machines - Part 2-1: Standard methods for determining losses and
efficiency from tests (excluding machines for traction vehicles)
Drehende elektrische Maschinen - Teil 2-1: Standardverfahren zur Bestimmung der
Verluste und des Wirkungsgrades aus Prüfungen (ausgenommen Maschinen für
Schienen- und Straßenfahrzeuge)
Machines électriques tournantes - Partie 2-1: Méthodes normalisées pour la
détermination des pertes et du rendement à partir d'essais (à l'exclusion des machines
pour véhicules de traction)
Ta slovenski standard je istoveten z: prEN IEC 60034-2-1:2022
ICS:
29.160.01 Rotacijski stroji na splošno Rotating machinery in
general
oSIST prEN IEC 60034-2-1:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN IEC 60034-2-1:2023
oSIST prEN IEC 60034-2-1:2023
2/2108/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60034-2-1 ED3
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2022-11-18 2023-02-10
SUPERSEDES DOCUMENTS:
2/2078/CD, 2/2094A/CC
IEC TC 2 : ROTATING MACHINERY
SECRETARIAT: SECRETARY:
United Kingdom Mr Charles Whitlock
OF INTEREST TO THE FOLLOWING COMMITTEES: PROPOSED HORIZONTAL STANDARD:

Other TC/SCs are requested to indicate their interest, if any, in
this CDV to the secretary.
FUNCTIONS CONCERNED:
EMC ENVIRONMENT QUALITY ASSURANCE SAFETY

SUBMITTED FOR CENELEC PARALLEL VOTING NOT SUBMITTED FOR CENELEC PARALLEL VOTING
Attention IEC-CENELEC parallel voting
The attention of IEC National Committees, members of
CENELEC, is drawn to the fact that this Committee Draft for Vote
(CDV) is submitted for parallel voting.
The CENELEC members are invited to vote through the
CENELEC online voting system.
This document is still under study and subject to change. It should not be used for reference purposes.
Recipients of this document are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

TITLE:
Rotating electrical machines – Part 2-1: Standard methods for determining losses and efficiency from tests
(excluding machines for traction vehicles)

PROPOSED STABILITY DATE: 2026
NOTE FROM TC/SC OFFICERS:
electronic file, to make a copy and to print out the content for the sole purpose of preparing National Committee positions.
You may not copy or "mirror" the file or printed version of the document, or any part of it, for any other purpose without
permission in writing from IEC.

oSIST prEN IEC 60034-2-1:2023
– 2 – IEC CDV 60034-2-1 © IEC 2022
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references . 7
3 Terms and definitions . 8
4 Symbols and abbreviations . 12
4.1 Symbols . 12
4.2 Additional subscripts . 13
5 Basic requirements . 14
5.1 Direct and indirect efficiency determination . 14
5.2 Uncertainty . 15
5.3 Preferred methods and methods for customer-specific acceptance tests,
field-tests or routine-tests . 15
5.4 Power supply . 15
5.4.1 Voltage . 15
5.4.2 Frequency . 15
5.5 Instrumentation . 15
5.5.1 General . 15
5.5.2 Measuring instruments for electrical quantities . 16
5.5.3 Torque measurement . 16
5.5.4 Speed and frequency measurement . 16
5.5.5 Temperature measurement . 17
5.6 Units . 17
5.7 Resistance . 17
5.7.1 Test resistance . 17
5.7.2 Winding temperature . 17
5.7.3 Correction to reference coolant temperature . 18
5.8 State of the machine under test and test categories . 18
5.9 Excitation circuit measurements . 19
5.10 Ambient temperature during testing . 19
6 Test methods for the determination of the efficiency of induction machines . 20
6.1 Preferred testing methods . 20
6.1.1 General . 20
6.1.2 Method 2-1-1A – Direct measurement of input and output . 20
6.1.3 Method 2-1-1B – Summation of losses, additional load losses according
to the method of residual loss . 22
6.1.4 Method 2-1-1C – Summation of losses with additional load losses from
assigned allowance . 30
6.2 Testing methods for field or routine-testing . 34
6.2.1 General . 34
6.2.2 Method 2-1-1D – Dual supply back-to-back-test . 35
6.2.3 Method 2-1-1E – Single supply back-to-back-test . 36
6.2.4 Method 2-1-1F – Summation of losses with additional load losses
determined by test with rotor removed and reverse rotation test . 37
6.2.5 Method 2-1-1G – Summation of losses with additional load losses
determined by Eh-star method . 41
6.2.6 Method 2-1-1H – Determination of efficiency by use of the equivalent
circuit parameters . 44
7 Test methods for the determination of the efficiency of synchronous machines . 50

oSIST prEN IEC 60034-2-1:2023
IEC CDV 60034-2-1 © IEC 2022 – 3 –
7.1 Preferred testing methods . 50
7.1.1 General . 50
7.1.2 Method 2-1-2A – Direct measurement of input and output . 51
7.1.3 Method 2-1-2B – Summation of separate losses with a rated load
temperature test and a short circuit test . 53
7.1.4 Method 2-1-2C – Summation of separate losses without a full load test . 59
7.2 Testing methods for field or routine testing . 61
7.2.1 General . 61
7.2.2 Method 2-1-2D – Dual supply back-to-back-test . 61
7.2.3 Method 2-1-2E – Single supply back-to-back-test . 63
7.2.4 Method 2-1-2F – Zero power factor test with excitation current from

Potier-, ASA- or Swedish-diagram . 64
7.2.5 Method 2-1-2G – Summation of separate losses with a load test without
consideration of additional load losses . 68
8 Test methods for the determination of the efficiency of d.c. machines . 69
8.1 Testing methods for field or routine testing . 69
8.1.1 General . 69
8.1.2 Method 2-1-3A – Direct measurement of input and output . 70
8.1.3 Method 2-1-3B – Summation of losses with a load test and d.c.
component of additional load losses from test. 71
8.1.4 Method 2-1-3C – Summation of losses with a load test and d.c.

component of additional load losses from assigned value . 77
8.1.5 Method 2-1-3D – Summation of losses without a load test . 80
8.1.6 Method 2-1-3E – Single supply back-to-back test . 82
Annex A (normative) Calculation of values for the Eh-star method . 85
Annex B (informative) Types of excitation systems . 88
Annex C (informative) Induction machine slip measurement. 89
Annex D (informative) Test report template for method 2-1-1B . 91
Bibliography . 93

Figure 1 – Sketch for torque measurement test . 21
Figure 2 – Efficiency determination according to method 2-1-1A . 21
Figure 3 – Efficiency determination according to method 2-1-1B . 23
Figure 4 – Smoothing of the residual loss data. 29
Figure 5 – Efficiency determination according to method 2-1-1C . 31
Figure 6 – Vector diagram for obtaining current vector from reduced voltage test . 32
Figure 7 – Assigned allowance for additional load losses P . 33
LL
Figure 8 – Efficiency determination according to method 2-1-1D . 35
Figure 9 – Sketch for dual supply back-to-back test . 35
Figure 10 – Efficiency determination according to method 2-1-1E . 36
Figure 11 – Efficiency determination according to method 2-1-1F . 38
Figure 12 – Efficiency determination according to method 2-1-1G . 41
Figure 13 – Eh-star test circuit . 42
Figure 14 – Induction machine, T-model with equivalent iron loss resistor . 45
Figure 15 – Efficiency determination according to method 2-1-1H . 45
Figure 16 – Induction machines, reduced model for calculation . 49
Figure 17 – Sketch for torque measurement test . 52

oSIST prEN IEC 60034-2-1:2023
– 4 – IEC CDV 60034-2-1 © IEC 2022
Figure 18 – Efficiency determination according to method 2-1-2A . 52
Figure 19 – Efficiency determination according to method 2-1-2B . 54
Figure 20 – Efficiency determination according to method 2-1-2C . 60
Figure 21 – Efficiency determination according to method 2-1-2D . 61
Figure 22 – Sketch for dual supply back-to-back test ( I If, f ) . 62
M GM G
Figure 23 – Efficiency determination according to method 2-1-2E . 63
Figure 24 – Single supply back-to-back test for synchronous machines . 63
Figure 25 – Efficiency determination according to method 2-1-2F . 65
Figure 26 – Efficiency determination according to method 2-1-2G . 69
Figure 27 – Sketch for torque measurement test . 70
Figure 28 – Efficiency determination according to method 2-1-3A . 71
Figure 29 – Efficiency determination according to method 2-1-3B . 72
Figure 30 – Sketch for single
...