GB/T 755-2019 English PDF (GBT755-2019)

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GB/T 755-2019: Rotating electrical machines -- Rating and performance
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. ...