SIST EN IEC 60034-33:2022

SLOVENSKI STANDARD
oSIST prEN IEC 60034-33:2021
01-junij-2021
Električni rotacijski stroji - 33. del: Posebne tehnične zahteve za sinhrone
hidrogeneratorje, vključno z motornimi generatorji
Rotating electrical machines - Part 33: Specific technical requirements for synchronous
hydrogenerators including motor-generators
Ta slovenski standard je istoveten z: prEN IEC 60034-33:2021
ICS:
29.160.20 Generatorji Generators
oSIST prEN IEC 60034-33:2021 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN IEC 60034-33:2021

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oSIST prEN IEC 60034-33:2021
2/2041/CDV

COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60034-33 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2021-03-05 2021-05-28
SUPERSEDES DOCUMENTS:
2/2014/CD, 2/2029A/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 33: Specific technical requirements for synchronous hydrogenerators including
motor-generators

PROPOSED STABILITY DATE: 2025

NOTE FROM TC/SC OFFICERS:


Copyright © 2021 International Electrotechnical Commission, IEC. All rights reserved. It is permitted to download this
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.

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oSIST prEN IEC 60034-33:2021
– 2 – IEC CDV 60034-33  IEC 2021
CONTENTS

FOREWORD . 6
1 Scope . 8
2 Normative references . 8
3 Terms and definitions . 9
4 Site operation conditions . 10
5 Ratings and parameters . 11
5.1 Output . 11
5.1.1 Output rating of a hydrogenerator . 11
5.1.2 Output ratings of a motor-generator . 11
5.1.3 Increase in active power . 11
5.1.4 Under-excited operation . 11
5.2 Rated voltage . 11
5.3 Rated power factor . 11
5.4 Rated speed . 11
5.5 P-Q capability diagram . 12
5.6 Voltage and frequency variations during operation . 13
5.7 Efficiency and losses . 14
5.7.1 Weighted average efficiency . 14
5.7.2 Losses . 15
5.7.3 Determination of winding losses . 15
5.7.4 Windage Losses . 16
5.7.5 Determination of thrust bearing losses for vertical machines . 16
5.7.6 Tolerance of the total losses . 16
5.8 Electrical parameters and time constants . 17
5.8.1 Short-circuit ratio . 17
5.8.2 Direct axis transient and subtransient reactances . 17
5.8.3 General case . 17
5.9 Tolerances on reactance . 17
5.10 Total harmonic distortion (THD) . 18
5.11 Torques . 18
6 Temperature . 18
6.1 Temperature rise . 18
6.2 Modification due to deviation from reference operation . 20
6.3 Bearing temperature . 20
7 Operating performances and electrical connections . 20
7.1 Special operational requirements . 20
7.1.1 Stator overload current . 20
7.1.2 Rotor overload current . 20
7.1.3 Continuous unbalanced load . 21
7.1.4 Short time unbalanced load . 21
7.1.5 Mechanical output overload . 21
7.1.6 Sudden short circuit . 22
7.2 Connection to grid . 22
7.2.1 Synchronization . 22
7.2.2 Application of load . 23
7.3 Starting of motor-generator . 23

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7.4 System Earthing . 23
7.5 Neutral point leads . 24
7.6 Rotating direction and phase sequence. 24
7.7 Stator winding . 24
8 Winding insulation . 25
8.1 Winding insulation performance . 25
8.1.1 General . 25
8.1.2 Winding insulation resistance . 25
8.1.3 Dielectric dissipation factor measurements on new stator bars or coils . 26
8.1.4 Partial discharge measurements for stator winding . 26
8.1.5 Voltage withstand test for turn insulation of multi-turn coil for stator . 26
8.2 Voltage withstand tests . 26
8.2.1 Stator bars/coils . 26
8.2.2 Inserted Stator bars/coils . 26
8.2.3 Stator winding completed before rotor inserted . 26
8.2.4 Excitation winding before delivery . 26
8.2.5 Excitation winding completed . 27
8.2.6 Stator winding for completed machine . 27
8.2.7 Excitation winding for completed machine . 27
8.2.8 DC alternative tests . 27
8.2.9 Global VPI stators . 27
8.3 Breakdown test for insulation . 27
8.4 Voltage endurance test for insulation . 28
8.5 Thermal cycle test . 28
8.6 Stator winding terminals . 29
9 Mechanical performances and design . 29
9.1 Rotating part mass moment of inertia . 29
9.2 Maximum speed . 29
9.3 Structural strength . 29
9.4 Critical bending speed . 30
9.5 Start and stop of motor-generators. 30
9.6 Start and stop of hydrogenerators . 30
9.7 Over speed . 30
9.8 Fatigue verification . 30
10 Core Vibration . 31
11 Noise . 31
12 Basic structural requirements . 32
12.1 General layout . 32
12.1.1 Structure and general layout of the machines . 32
12.1.2 Machine components . 32
12.1.3 Hydraulic or pneumatic braking system . 33
12.1.4 Hydraulic jacking system . 33
12.1.5 Dynamical (Electrical) braking . 33
12.2 Stator . 33
12.2.1 Frame and core structure. 33
12.2.2 Stator frame connecting structure . 33
12.2.3 Stator end winding . 33
12.3 Rotor . 34

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12.3.1 Damper winding . 34
12.3.2 Structure with one shaft or segmented shafts . 34
12.4 Structure tolerance . 34
12.5 Bearings . 34
12.5.1 Bearing alloy . 34
12.5.2 Bearing lubricant . 34
12.5.3 Shaft currents . 34
12.5.4 Bearing insulation resistance . 34
13 Ventilation and cooling system . 35
13.1 Cooling scheme . 35
13.1.1 General . 35
13.1.2 Air cooling system . 35
13.1.3 Evaporative cooling system . 35
13.1.4 Water cooling system . 35
13.2 Redundancy on air to water cooler design . 35
13.3 Cooling structure . 35
13.3.1 Materials . 35
13.3.2 Water supply and drainage . 35
13.3.3 Cooling water pressure . 35
14 Instrumentation required for protection and control . 36
14.1 General . 36
14.2 Stator and bearing temperature . 36
14.3 Bearing vibration and shaft displacement . 36
15 Condition monitoring of machines . 37
15.1 General . 37
15.2 Instrumentation required for condition monitoring . 37
16 Marking . 37
16.1 Following information shall be marked on machine nameplate: . 37
16.2 Repaired or refurbished machines . 38
17 Factory and site tests . 38
Annex A (informative) Special tools . 39
Annex B (informative) Correction of measured windage losses on the machines . 40
Annex C (informative) Correction of measured bearing losses for different oil bath

temperatures . 42
Annex D (informative) Scope of supply . 44
Annex E (informative) Test run and guaranteed period. 45
E.1 72 h test run . 45
E.2 15-30 day examination test run for motor-generators . 45
E.3 Handover and guarantee period . 45
Annex F (informative) Test items . 46
F.1 Inspection test for hydrogenerator and motor-generator in factory . 46
F.2 Site routine test of hydrogenerator and motor-generator . 46
F.3 Startup test run of hydrogenerator and motor-generator . 47
F.4 Performance test of hydrogenerator . 47
Annex G (informative) Condition Monitoring . 48
G.1 Air gap distance . 48
G.2 Core and frame vibration. 48
G.3 Stator end winding vibration . 48

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G.4 Partial discharge . 48
G.5 Air gap magnetic flux . 49
Bibliography . 50

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oSIST prEN IEC 60034-33:2021
– 6 – IEC CDV 60034-33  IEC 2021
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Rotating electrical machines –

Part 33: Specific technical requirements for synchronous
hydrogenerators including motor-generators

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
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preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of 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 IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
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any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
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6) All users should ensure that they have the latest edition of this publication.
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60034-33 has been prepared by working group 33: Rotating electrical
machines – Part 33: Specific technical requirements for synchronous hydrogenerators including motor-
generators, of IEC technical committee 2: Rotating Machinery.
The text of this standard is based on the following documents:
FDIS Report on voting
XX/XX/FDIS XX/XX/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 in the IEC 60034 series, published under the general title Rotating electrical
machines, can be found on the IEC website.

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oSIST prEN IEC 60034-33:2021
IEC CDV 60034-33  IEC 2021 – 7 –
The committee has decided that the contents of this publication will remain unchanged until the
stability 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.

The National Committees are requested to note that for this publication the stability date is .
THIS TEXT IS INCLUDED FOR THE INFORMATION OF THE NATIONAL COMMITTEES AND WILL BE DELETED
AT THE PUBLICATION STAGE.

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oSIST prEN IEC 60034-33:2021
– 8 – IEC CDV 60034-33  IEC 2021
1 1 Scope
2 This part of IEC 60034 applies to three-phase salient-pole synchronous generators and synchronous
3 motor-generators for hydraulic turbine and pump-turbine applications, that have rated frequency of 50
4 Hz or 60 Hz, rated output of 10 MVA and above, pole pair number 3 and above, and rated voltage of 6
5 kV and above.
6 This document supplements basic requirements for rotating machines given in IEC 60034-1.
7 2 Normative references
8 The following documents are referred to in the text in such a way that some or all of their content
9 constitutes requirements of this document. For dated references, only the edition cited applies. For
10 undated references, the latest edition of the referenced document (including any amendments) applies.
11 IEC 60034-1, Rotating electrical machines – Part 1: Rating and performance
12 IEC 60034-2-2, Rotating electrical machines – Part 2-2: Specific methods for determining
13 separate losses of large machines from tests – Supplement to IEC 60034-2-1
14 IEC 60034-4-1, Rotating electrical machines - Part 4-1: Methods for determining electrically
15 excited synchronous machine quantities from tests
16 IEC 60034-9, Rotating electrical machines – Part 9: Noise limits
17 IEC 60034-18-1: Rotating electrical machines – Part 18-1: Functional evaluation of insulation
18 systems – General guidelines Amendment 1 (1996)
19 IEC 60034-18-32: Rotating electrical machines – Part 18-32: Functional evaluation of insulation
20 systems – Electrical endurance qualification procedures for form-wound windings
21 IEC 60034-18-33: Rotating electrical machines – Part 18-33: Functional evaluation of insulation
22 systems – Test procedures for multifunctional evaluation of form-wound windings by endurance
23 under combined thermal and electrical stresses of insulation systems used in rotating machines
24 IEC 60034-27-1, Rotating electrical machines – Part 27-1: Off-line partial discharge
25 measurements on the stator winding insulation of rotating electrical machines
26 IEC TS 60034-27-2, Rotating electrical machines – Part 27-2: On-line partial discharge
27 measurements on the stator winding insulation of rotating electrical machines
28 IEC 60034-27-3, Rotating electrical machines – Part 27-3: Dielectric dissipation factor
29 measurement on stator winding insulation of rotating electrical machines
30 IEC 60034-27-4, Rotating electrical machines – Part 27-4: Measurement of insulation
31 resistance and polarization index of winding insulation of rotating electrical machines
32 IEC TS 60034-32, Rotating electrical machines – Part 32: Measurement of stator end-winding
33 vibration at form-wound windings
34 IEC 60050-411, International Electrotechnical Vocabulary – Chapter 411: Rotating Machines
35 IEC 60060-1, High-voltage test techniques – Part 1: General definitions and test requirements
36 IEC 60085, Electrical insulation – Thermal evaluation and designation

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37 IEC 60417, Graphical symbols for use on equipment
38 IEC 60445, Basic and safety principles for man-machine interface, marking and identification –
39 Identification of equipment terminals, conductor terminations and conductors
40 IEC 63132-1, Guide for installation procedures and tolerances of hydroelectric machines – Part
41 1: Common
42 IEC 63132-2, Guide for installation procedures and tolerances of hydroelectric machines – Part
43 2: Vertical generator
44 ISO 5801, Industrial fans - Performance testing using standardized airways
45 ISO 19283, Condition monitoring and diagnostics of machines – Hydroelectric generating units
46 ISO 20816-1, Mechanical vibration — Measurement and evaluation of machine vibration —Part
47 1: General Guidelines
48 ISO 20816-5, Mechanical vibration — Measurement and evaluation of machine vibration —Part
49 5: Machine sets in hydraulic power generating and pump-storage plants
50 3 Terms and definitions
51 For the purposes of this document, the terms and definitions given in IEC 60034-1, IEC 60034-
52 2-1, IEC 60034-2-2, IEC 60050411, IEC 63132-1, some of which are repeated here for
53 convenience, and those specified below apply.
54 3.1
55 hydrogenerator
56 a synchronous machine operated as generator and driven by a hydraulic turbine
57 3.2
58 motor-generator
59 a synchronous machine which can operate in motor mode and generator mode, generally used
60 in pumped-storage power plant
61 3.3
62 stator concentricity
63 the radial distance from the reference centre to the best centre of stator bore
64 3.4
65
...