EN IEC 60034-30-3:2024
(Main)Rotating electrical machines - Part 30-3: Efficiency classes of high voltage AC motors (IE-code)
Rotating electrical machines - Part 30-3: Efficiency classes of high voltage AC motors (IE-code)
IEC 60034-30-3:2024 specifies efficiency classes for fixed-speed three-phase high-voltage cage induction motors in accordance with IEC 60034-1 that - have a rated voltage exceeding 1 000 V, but not exceeding 11 kV; - have a rated power from 200 kW to 2 000 kW; This document provides the global harmonization of energy-efficiency classes of three-phase cage induction motors with rated voltage above 1 000 V that are rated for direct online starting and fixed-speed operation at a 50 Hz or 60 Hz supply with sinusoidal voltage.
Drehende elektrische Maschinen - Teil 30-3: Wirkungsgradklassen von Hochspannungs-Wechselstrommotoren (IE-Code)
Machines électriques tournantes - Partie 30-3: Classes de rendement des moteurs à courant alternatif à haute tension (code IE)
IEC 60034-30-3:2024 spécifie les classes de rendement pour les moteurs triphasés à induction à cage à haute tension et à vitesse fixe conformément à l'IEC 60034-1, qui - ont une tension assignée supérieure à 1 000 V, mais qui ne dépasse pas 11 kV; - ont une puissance assignée comprise entre 200 kW et 2 000 kW; Le présent document prévoit l'harmonisation globale des classes de rendement énergétique des moteurs triphasés à induction à cage dont la tension assignée est supérieure à 1 000 V, qui sont assignés pour démarrer directement sur réseau et fonctionner à vitesse fixe sur une alimentation de 50 Hz ou 60 Hz avec une tension sinusoïdale.
Električni rotacijski stroji - 30-3. del: Razredi učinkovitosti visokonapetostnih AC motorjev (oznaka IE)
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2023
Električni rotacijski stroji - 30-3. del: Razredi učinkovitosti visokonapetostnih AC
motorjev (oznaka IE)
Rotating electrical machines - Part 30-3: Efficiency classes of high voltage AC motors (IE
code)
Ta slovenski standard je istoveten z: prEN 60034-30-3:2023
ICS:
29.160.30 Motorji Motors
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
2/2131/CDV
COMMITTEE DRAFT FOR VOTE (CDV)
PROJECT NUMBER:
IEC 60034-30-3 ED1
DATE OF CIRCULATION: CLOSING DATE FOR VOTING:
2023-04-21 2023-07-14
SUPERSEDES DOCUMENTS:
2/2117/CD, 2/2128A/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
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Vote (CDV) is
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TITLE:
Rotating electrical machines – Part 30-3: Efficiency classes of high voltage AC motors (IE code)
PROPOSED STABILITY DATE: 2025
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.
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2/2131/CDV – 2 – IEC CDV 60034-30-3 © IEC 2023
CONTENTS
1 Scope . 6
2 Normative references . 9
3 Terms, definitions and symbols . 10
Terms and definitions . 10
Symbols . 10
4 Efficiency classification . 12
Determination . 12
Efficiency rating . 12
5 Required documentation . 17
Annex A (informative) Standardized nameplate efficiency values . 18
Annex B (informative) Proposal for technology factor for starting conditions for high
voltage cage induction motors outside the scope of this standard . 19
Annex C (informative) Example for determining the nominal efficiency . 20
Bibliography . 21
IEC CDV 60034-30-3 © IEC 2023 – 3 – 2/2131/CDV
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ROTATING ELECTRICAL MACHINES –
Part 30-3: Efficiency classes of high voltage AC motors (IE-code)
FOREWORD
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This International Standard IEC 60034-30-3 has been prepared by IEC technical committee 2:
Rotating machinery.
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.
NOTE A table of cross-references of all IEC TC 2 publications can be found in the IEC TC 2 dashboard on the IEC
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2/2131/CDV – 4 – IEC CDV 60034-30-3 © IEC 2023
The committee has decided that the contents of this publication will remain unchanged until the
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The National Committees are requested to note that for this publication the stability date
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THIS TEXT IS INCLUDED FOR THE INFORMATION OF THE NATIONAL COMMITTEES AND WILL BE DELETED
AT THE PUBLICATION STAGE.
IEC CDV 60034-30-3 © IEC 2023 – 5 – 2/2131/CDV
1 INTRODUCTION
2 This IEC standard provides the global harmonization of energy-efficiency classes of three-
3 phase cage induction motors with rated voltage above 1000 V that are rated for direct online
4 starting and fixed-speed operation at a 50 Hz or 60 Hz supply with sinusoidal voltage.
5 For these motors, the demands of the power supply and of the driven equipment in many cases
6 govern the design of the electrical machine. Due to the large size and power of high-voltage
7 (HV) motors, these demands are more complex than for low-voltage motors and often limit the
8 design. Vice versa, the properties of the electrical machine itself influence the grid considerably
9 in many cases.
10 In order to ensure an easy applicability of the standard, the scope must be limited to the most
11 relevant applications, i.e. motors for driving the vast majority of pumps, fans, or compressors,
12 which cover approximately 80% to 90% of all applications. Motors for special applications, e.g.
13 for accelerating very high load inertia, for very low supply voltage during starting, for very low
14 locked-rotor current or for accelerating against high load torque, are therefore out of the scope
15 of this standard.
16 Despite this, the motor technology, namely
17 • rated voltage,
18 • method of cooling,
19 • locked-rotor current,
20 have a significant influence on the achievable motor efficiency as well as the rated frequency,
21 the rated power and the number of poles, and must be considered when specifying the efficiency
22 class.
23 NOTE When specifying or designing a power drive system, it should be considered that low voltage motors will mostly
24 have a higher efficiency than high voltage motors with the same rated power. However, considering the losses of the
25 complete system, i. e. including cabling and transformer losses, high voltage solution might be advantageous.
2/2131/CDV – 6 – IEC CDV 60034-30-3 © IEC 2023
27 ROTATING ELECTRICAL MACHINES –
29 Part 30-3: Efficiency classes of high voltage AC motors (IE-code)
31 1 Scope
32 This part of IEC 60034 specifies efficiency classes for fixed-speed three-phase high-voltage
33 cage induction motors in accordance with IEC 60034-1 that
34 • have a rated voltage exceeding 1000 V, but not exceeding 11 kV;
35 • have a rated power from 200 kW to 2000 kW;
36 NOTE 1 Motors with rated power above 2000 kW are produced in such small numbers and are designed and
37 produced with a focus on achieving an optimum efficiency anyway even though fulfilling increasingly special
38 requirements that assigning efficiency classes would be an additional effort without the result of any countable
39 energy saving.
40 • have two, four and six poles;
41 • are line-operated single-speed;
42 • are intended for direct-on-line starting at rated or at reduced voltage and rated
43 frequency;
44 • are constructed to any degree of protection;
45 • are designed for cooling methods IC411, IC511, IC611, IC01 or IC81W;
46 • are capable of continuous operation at their rated operating point (torque/power, speed)
47 with a temperature rise within the specified insulation temperature class;
48 NOTE 2 Most motors covered by this standard are rated for duty type S1 (continuous duty). However, some
49 motors that are rated for other duty cycles are still capable of continuous operation at their rated power and
50 these motors are also covered.
51 • are rated for any ambient temperature or coolant temperature within the range of – 20 °C
52 to + 60 °C;
53 NOTE 3 Motors rated for temperatures outside the range – 20 °C and + 60 °C are considered to be of special
54 construction and are consequently excluded from this standard.
55 • are rated for an operating altitude up to 2 000 m above sea level.
56 NOTE 4 The rated efficiency and the efficiency class are based on a rating for altitudes up to 1 000 m above
57 sea level.
58 • have a locked-rotor current Il at stand-still and supply with rated voltage and frequency
59 before application of any IEC or agreed tolerance in the range I / I ≥ 4,5,
l N
60 • are designed for a customer load torque during starting not exceeding an envelope with
61 a minimum of 25% of the rated torque at low speed and a square shape T ~ n² up to a
62 maximum load torque at full speed of 60% of the rated torque in case of 2pole motors
63 or 100% of the rated torque in case of 4pole or 6pole motors, respectively, (see Figure
64 1), After starting is completed, the load torque of 2pole motors is increased to 100 % of
65 the rated torque.
66 • have to accelerate an external moment of inertia as defined by the customer
67 requirements not exceeding the values given in Table 1 considering all start up
68 conditions defined in this standard for not more than three consecutive starts from cold
69 condition or two starts from hot condition, respectively,
70 • are designed for a minimum locked-rotor steady state supply voltage of at least 80% of
71 the rated voltage during starting.
IEC CDV 60034-30-3 © IEC 2023 – 7 – 2/2131/CDV
Speed in % of rated speed
76 Figure 1 – Envelope of the load torque during starting:
77 Load torque during starting in % of rated torque over speed in % of rated speed
Load torque during starting in % of rated torque
2/2131/CDV – 8 – IEC CDV 60034-30-3 © IEC 2023
79 Table 1 – Maximum external moment of inertia
...
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