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GB/T 755-2019 (GB/T755-2019, GBT 755-2019, GBT755-2019)
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GB/T 755-2019: PDF in English (GBT 755-2019)

GB/T 755-2019
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.160.01
K 20
GB/T 755-2019 / IEC 60034-1:2017
Replacing GB/T 755-2008
Rotating electrical machines - Rating and performance
(IEC 60034-1:2017, Rotating electrical machines -
Part 1: Rating and performance, IDT)
ISSUED ON: DECEMBER 10, 2019
IMPLEMENTED ON: JULY 01, 2020
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 3
1 Scope ... 7
2 Normative references ... 7
3 Terms and definitions ... 9
4 Duty ... 16
5 Rating ... 33
6 Site conditions... 37
7 Electrical operating conditions ... 38
8 Thermal performance and tests ... 47
9 Other performance and tests ... 66
10 Rating plates ... 76
11 Miscellaneous requirements ... 80
12 Tolerances ... 82
13 Electromagnetic compatibility (EMC) ... 84
14 Safety ... 86
Annex A (Informative) Guidance for the application of duty type S10 and for
establishing the value of relative thermal life expectancy TL ... 87
Annex B (Informative) Electromagnetic compatibility (EMC) limits... 89
Bibliography ... 90
Foreword
This Standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 755-2008 "Rotating electrical machines - Rating
and performance". Compared with GB/T 755-2008, in addition to editorial
changes, the main technical changes are as follows:
- Modify the thermal equilibrium condition as follows: The temperature rises
of the heating parts of the machine do not vary by more than a gradient of
1 K per half hour (see 3.25; 3.25 of the 2008 edition);
- ADD the term "runaway speed" (see 3.33);
- Modify the requirements of water coolant temperature (see 6.5; 6.5 of the
2008 edition);
- ADD the provision that variable-frequency machines shall meet the IVIC
requirements; ADD the requirements of bus transfer and fast reclosing (see
7.1);
- ADD Table 3, CCC symbol designation of converter supply mode (see Table
3 in 7.2.4);
- Modify item 5 of Table 4 in 7.3: Synchronous generator driven by steam
turbines or combustion gas turbines with rated output ≥10 MVA (see Table
4; Table 3 of the 2008 edition);
- ADD the provision on impulse voltage insulation class for machines
designed to operate without partial discharges (see 7.5);
- ADD a new insulation class 200(N); modify some temperature rise limits in
Table 8 (see Table 8; Table 7 of the 2008 edition);
- Modify the calculation formula of item 1b in Table 10 (see Table 10; Table 9
of the 2008 edition);
- ADD the marking of IC code, IVIC of variable-frequency machines, and of
efficiency class IE code (see 10.2);
- Modify items 1 and 2 of tolerances (see 12.2; 12.2 of the 2008 edition);
- ADD EMC requirements for excitation synchronous machines without
brushes (see 13.1).
This Standard, using translation method, is identical to IEC 60034-1:2017
"Rotating electrical machines - Part 1: Rating and performance".
China’s documents which have a consistent correspondence with the
international documents normatively referenced in this Standard are as follows:
- GB/T 156-2017 Standard voltages (IEC 60038:2009, MOD);
- GB/T 1971-2006 Rotating electrical machines - Terminal markings and
direction of rotation (IEC 60034-8:2002, IDT);
- GB/T 1993-1993 Cooling methods for rotating electrical machines (eqv IEC
60034-6:1991);
- GB/T 4026-2010 Basic and safety principles for man-machine interface,
marking and identification - Identification of equipment terminals and of
conductor terminations (IEC 60445:2006, IDT);
- GB 4343.1-2018 Electromagnetic compatibility requirements for household
appliances, electric tools and similar apparatus - Part 1: Emission (CISPR
14-1:2011, IDT);
- GB 4706.1-2005 Household and similar electrical appliances - Safety - Part
1: General requirements (IEC 60335-1:2004, IDT);
- GB/T 4772.1-1999 Dimensions and output series for rotating electrical
machines - Part 1: Frame numbers 56 to 400 and flange numbers 55 to
1080 (IEC 60072-1:1991, IDT);
- GB/T 4772.2-1999 Dimensions and output series for rotating electrical
machines - Part 2: Frame numbers 355 to 1000 and flange numbers 1180
to 2360 (IEC 60072-2:1990, IDT);
- GB/T 4772.3-1999 Dimensions and output series for rotating electrical
machines - Part 3: Small built-in motors - Flange numbers BF10 to BF50
(IEC 60072-3:1994, IDT);
- GB 4824-2013 Industrial, scientific and medical (ISM) radio-frequency
equipment - Disturbance characteristics - Limits and methods of
measurement (IEC/CISPR 11:2010, IDT);
- GB/T 4942.1-2006 Degrees of protection provided by the integral design of
rotating electrical machines (IP code) - Classification (IEC 60034-5:2000,
IDT);
- GB 5226.1-2008 Electrical safety of machinery - Electrical equipment of
machines - Part 1: General requirements (IEC 60204-1:2005, IDT);
- GB/T 6113.101-2016 Specification for radio disturbance and immunity
measuring apparatus and methods - Part 1-1: Radio disturbance and
immunity measuring apparatus - Measuring apparatus (CISPR 16-1-1:2010,
IDT);
- GB/T 11021-2014 Electrical insulation - Thermal evaluation and designation
(IEC 60085:2007, IDT);
- GB/T 17948 (all parts) Rotating electrical machines - Functional evaluation
of insulation systems [IEC 60034-18 (all parts)];
- GB/T 22715-2016 Impulse voltage withstand levels of form-wound stator
coils for rotating a.c. machines (IEC 60034-15:2009, IDT);
- GB/T 25442-2018 Standard methods for determining losses and efficiency
of rotation electrical machines from tests (excluding machines for traction
vehicles) (IEC 60034-2-1:2014, IDT);
- GB/T 32877-2016 Specific test methods for determining losses and
efficiency of converter-fed AC induction motors (IEC/TS 60034-2-3:2013,
IDT).
This Standard has made the following editorial changes:
- CHANGE the standard name to "Rotating electrical machines - Rating and
performance";
- CORRECT the clerical errors of the source text.
This Standard was proposed by China Electrical Equipment Industry
Association.
This Standard shall be under the jurisdiction of National Technical Committee
26 on Electric Rotating Machinery of Standardization Administration of China
(SAC/TC 26).
Drafting organizations of this Standard: Shanghai Motor System Energy-saving
Engineering Technology Research Center Co., Ltd.; Harbin Electric Power
Equipment Co., Ltd.; Shanghai Electric Machinery Co., Ltd. (SEC); Hebei
Electric Motor Co., Ltd.; Shandong Huali Electric Motor Group Co., Ltd.; Regal
Beloit (Wuxi) Co., Ltd.; Nanchang Kungfu Power Equipment Co., Ltd.; Wolong
Electric Group Co., Ltd.; Chongqing Electric Machine Federation Ltd.;
Guangdong Dongguan Electric Motor Co., Ltd.; Jiangsu Xi’anda Explosion-
proof Co., Ltd.; Shandong Qilu Motor Manufacturing Co., Ltd.; Shanghai CDQC
Electric Co., Ltd.; SEC Electric Machinery Co., Ltd.; Zhejiang Special Motor
Limited Company by Shares; Rongcheng Rongjia Power Co., Ltd.; Wolong
Rotating electrical machines - Rating and performance
1 Scope
This Standard is applicable to all rotating electrical machines except those
covered by other national standards and IEC standards, for example, IEC
60349.
Machines within the scope of this Standard may also be subject to superseding,
modifying or additional requirements in other national standards and IEC
standards, for example, IEC 60079 and IEC 60092.
Note: If particular clauses of this Standard are modified to meet special applications, for
example machines subject to radioactivity or machines for aerospace, all other
clauses apply insofar as they are compatible.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the editions with the dates indicated are
applicable to this document. For the undated references, the latest edition
(including all the amendments) are applicable to this document.
GB/T 2900.25-2008 Electrotechnical terminology - Rotating electrical
machines (IEC 60050-411:1996, IDT)
GB/T 21210-2016 Starting performance of single-speed three-phase cage
induction motors (IEC 60034-12:2016, IDT)
IEC 60027-1 Letter symbols to be used in electrical technology - Part 1:
General
IEC 60027-4 Letter symbols to be used in electrical technology - Part 4:
Rotating electric machines
IEC 60034-2 (all parts) Rotating electrical machines - Part 2: Standard
methods for determining losses and efficiency from tests (excluding
machines for traction vehicles)
IEC 60034-3 Rotating electrical machines - Part 3: Specific requirements for
synchronous generators driven by steam turbines or combustion gas
turbines
IEC 60034-5 Rotating electrical machines - Part 5: Degrees of protection
provided by the integral design of rotating electrical machines (IP code) -
Classification
IEC 60034-6 Rotating electrical machines - Part 6: Methods of cooling (IC
code)
IEC 60034-8 Rotating electrical machines - Part 8: Terminal markings and
direction of rotation
IEC 60034-15 Rotating electrical machines - Part 15: Impulse voltage
withstand levels of form-wound stator coils for rotating a.c. machines
IEC 60034-18 (all parts) Rotating electrical machines - Part 18: Functional
evaluation of insulation systems
IEC 60034-18-41 Rotating electrical machines - Part 18-41: Partial discharge
free electrical insulation systems (Type I) used in rotating electrical machines
fed from voltage converters - Qualification and quality control tests
IEC TS 60034-25 Rotating electrical machines - Part 25: AC electrical
machines used in power drive systems - Application guide
IEC 60034-29 Rotating electrical machines - Part 29: Equivalent loading and
superposition techniques - Indirect testing to determine temperature rise
IEC 60034-30 (all parts) Rotating electrical machines - Part 30: Efficiency
classes of A.C. motors (IE-code)
IEC 60038 IEC standard voltages
IEC 60060-1 High-voltage test techniques - Part 1: General definitions and
test requirements
IEC 60072 (all parts) Dimensions and output series for rotating electrical
machines
IEC 60085 Electrical insulation - Thermal evaluation and designation
IEC 60204-1 Safety of machinery - Electrical equipment of machines - Part
1: General requirements
IEC 60204-11 Safety of machinery - Electrical equipment of machines - Part
11: Requirements for HV equipment for voltages above 1000 V a.c. or 1500
V d.c. and not exceeding 36 kV
IEC 60335-1:2010 Household and similar electrical appliances - Safety - Part
1: General requirements
IEC 60445 Basic and safety principles for man-machine interface, marking
and identification - Identification of equipment terminals, conductor
terminations and conductors
IEC 60664-1 Insulation coordination for equipment within low-voltage
systems - Part 1: Principles, requirements and tests
IEC 61148 Terminal markings for valve device stacks and assemblies and
for power conversion equipment
IEC 61293 Marking of electrical equipment with ratings related to electrical
supply - Safety requirements
CISPR 11 Industrial, scientific and medical equipment - Radiofrequency
disturbance characteristics - Limits and methods of measurement
CISPR 14 (all parts) Electromagnetic compatibility - Requirements for
household appliances, electric tools and similar apparatus
CISPR 16 (all parts) Specification for radio disturbance and immunity
measuring apparatus and methods
3 Terms and definitions
For the purposes of this document, the terms and definitions in GB/T 2900.25-
2008, and the following apply.
Note 1: For definitions concerning cooling and coolants, other than those in 3.17 to 3.22,
see IEC 60034-6.
Note 2: For the purposes of this document, the term ‘agreement’ means ‘agreement
between the manufacturer and purchaser’.
3.1
Rated value
Quantity value assigned, generally by a manufacturer, for a specified operating
condition of a machine.
Note: The rated voltage or voltage range is the rated voltage or voltage range between
lines at the terminals.
[GB/T 2900.25-2008, definition 411-51-23]
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.