GB/T 12665-2017_English: PDF (GB/T12665-2017)
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Requirements of damp-heat testing of electrical machine for service in general environmental condition
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Requirements of damp-heat testing of electrical machine for service in general environmental condition
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Standard ID | GB/T 12665-2017 (GB/T12665-2017) | Description (Translated English) | Requirements of damp-heat testing of electrical machine for service in general environmental condition | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | K26 | Classification of International Standard | 19.040 | Word Count Estimation | 11,125 | Date of Issue | 2017-11-01 | Date of Implementation | 2018-05-01 | Older Standard (superseded by this standard) | GB/T 12665-2008 | Drafting Organization | China Electric Apparatus Research Institute Co., Ltd., Zhejiang Lian Yi Motor Co., Ltd., Hangzhou Microelectronics Co., Ltd., Anhui University, Wei Kai Detection Technology Co., Ltd., Hangzhou Fusheng Electrical Co., Ltd., Guangdong Welling Motor Manufacturing Co., Ltd., Xiamen Fran home appliances Technology Co., Ltd., Xi'an Asahi Mai smart home appliances Technology Co., Ltd., Wenzhou Ang Wah New Energy Co., Ltd. | Administrative Organization | National Rotating Electrical Standardization Technical Committee (SAC/TC 26) | Regulation (derived from) | National Standard Announcement 2017 No. 29 | Proposing organization | China Electrical Equipment Industry Association | Issuing agency(ies) | People's Republic of China General Administration of Quality Supervision, Inspection and Quarantine, China National Standardization Administration | Standard ID | GB/T 12665-2008 (GB/T12665-2008) | Description (Translated English) | Requirements of damp-heat testing of electrical machine for service in general environmental condition | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | K20 | Classification of International Standard | 19.040 | Word Count Estimation | 10,149 | Date of Issue | 2008-06-13 | Date of Implementation | 2009-03-01 | Older Standard (superseded by this standard) | GB/T 12665-1990 | Quoted Standard | GB 755-2000; GB/T 2423.3-2006; GB/T 2423.4-1993 | Drafting Organization | China Electric Apparatus Research Institute | Administrative Organization | National Standardization Technical Committee rotating electrical small power motor Standardization Technical Committee | Regulation (derived from) | Announcement of Newly Approved National Standards No. 10 of 2008 (total 123) | Proposing organization | China Electrical Equipment Industry Association | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | Summary | This standard specifies the general environmental conditions in a rotating motor heat test method, technical requirements and inspection rules. This standard applies to all types of rotary motors. According to GB 755 regulations, the use of ambient relative humidity: the wettest month average maximum relative humidity of 90 %, while the monthly average minimum temperature not higher than 25��C motors shall comply with the provisions of the standard. | Standard ID | GB/T 12665-1990 (GB/T12665-1990) | Description (Translated English) | Requirements of damp-heat testing of electrical machine for service in general environmental condition | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | K20 | Classification of International Standard | 19.04 | Word Count Estimation | 7,750 | Date of Issue | 1990/12/28 | Date of Implementation | 1991/10/1 | Regulation (derived from) | Announcement of Newly Approved National Standards No. 10, 2008 (No. 123 overall) | Proposing organization | People Republic of China Ministry of Machinery and Electronics Industry | Issuing agency(ies) | State Bureau of Technical Supervision |
GB/T 12665-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.040
K 26
Replacing GB/T 12665-2008
Requirements of damp-heat testing of electrical machine
for service in general environmental condition
ISSUED ON. NOVEMBER 1, 2017
IMPLEMENTED ON. MAY 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword . 3
1 Scope .. 4
2 Normative references . 4
3 Technical requirements . 4
4 Test method . 7
5 Inspection rules .. 13
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 12665-2008 "Requirements of damp-heat testing
of electrical machine for service in general environmental condition". Compared
with GB/T 12665-2008, the main technical changes in this Standard are as
follows.
- updated Clause 2 Normative references;
- modified "voltage resistance" to "electrical strength" (see 3.3 of this
Edition);
- modified alternating humidity test method, added Method 2 (see 4.2 of
this Edition);
- added Figure 2;
- deleted moisture-proof humidifier, added NOTE 1 (see 4.3 of Edition
2008);
- added test method for leakage current after damp-heat (see 4.4 of this
Edition).
This Standard was proposed by China Electrical Appliance Industry Association.
This Standard shall be under the jurisdiction of National Technical Committee
on Rotary Motor of Standardization Administration of China (SAC/TC 26).
The drafting organizations of this Standard. China Electric Apparatus Research
Institute Co., Ltd., Zhejiang Lianyi Motor Co., Ltd., Hangzhou Weiguang
Electronics Co., Ltd., Anhui University, Weikai Detection Technology Co., Ltd.,
Hangzhou Fusheng Electric Appliance Co., Ltd., Guangdong Welling Motor
Manufacturing Co., Ltd., Zhejiang Jiuke Electric Co., Ltd., Xiamen Fran
Appliances Technology Co., Ltd., Xi'an Xumai Intelligent Household Appliance
Technology Co., Ltd., Wenzhou Anghua New Energy Co., Ltd.
Main drafters of this Standard. Zheng Ziying, Huang Haiyan, Li Guoli, He Ping,
Liu Mingtao, Zhang Yunchang, Zhang Bing, Wang Jianchi, Long Xinhua, Chen
Feng, Bao Yikai.
Versions of standard substituted by this Standard are.
- GB/T 12665-1990, GB/T 12665-2008.
Requirements of damp-heat testing of electrical machine
for service in general environmental condition
1 Scope
This Standard specifies the damp-heat test method, technical requirements and
inspection rules of rotary electrical machine in general environmental condition.
This Standard applies to all types of rotary electrical machines (except micro-
control electrical machine, hereinafter referred to as the electrical machine).
2 Normative references
The following referenced documents are indispensable for the application of
this document. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any
amendments) applies.
GB/T 755, Rotating electrical machines - Rating and performance
GB/T 2423.3-2006, Environmental testing for electric and electronic products
- Part 2. Testing method test Cab. Damp heat Steady state
GB/T 2423.4-2008, Environmental testing for electric and electronic products
- Part 2. Test method - Test Db. Damp heat, cyclic (12h+12h cycle)
GB/T 12113-2003, Methods of measurement of touch current and protective
conductor current
3 Technical requirements
3.1 Insulation resistance
3.1.1 The insulation resistance value between the windings of the whole
machine to the casing and the winding shall not be lower than the following
values.
a) for the electrical machine with rated voltage of 220V and above, determine
according to equation (1).
4.1.3 Pre-treatment of test specimen
Before the damp-heat test, the test specimen shall be placed in a hot and humid
test chamber for preheating. The preheating temperature is 25°C ~ 35°C. From
the time when the temperature of the damp-heat test chamber reaches 25°C,
the time is not less than 8h.
4.2 Damp-heat test method
According to GB/T 2423.4-2008, perform the alternating damp-heat test. High
temperature is generally 40°C. According to the severity of the use of occasions,
it can choose 55°C. There are two ways to reduce the temperature (see Figure
1 and Figure 2). Choose one of them to test. The conditions for each test cycle
are shown in Figure 1 and Figure 2. Carry out 6 cycles in total. The entire
machine or component (only for large electrical machine) shall meet the
requirements of 3.2~3.5 after the damp-heat test specified in this sub-clause.
Method 1 (see Figure 1)
The temperature shall be reduced to 25°C±3°C within 3h~6h. At the
temperature drop rate in the initial 1.5h, it shall be as shown in Figure 1, the
temperature reaches 25°C ± 3°C within 3h ± 15min. The relative humidity in the
first 15 minutes shall not be less than 90%, and the relative humidity in other
time shall not be less than 95%.
Method 2 (see Figure 2)
The temperature shall be reduced to 25°C±3°C within 3h~6h. But there is no
additional requirement for the first 1.5h in Method 1. The relative humidity shall
not be less than 80%.
NOTE. The selection of Method 1 and Method 2 can refer to GB/T 2423.4-2008.
According to the situation of motor use, the product can also be subject
according to GB/T 2423.3-2006 to the constant damp-heat test. A constant
damp-heat test is conducted under the conditions of a test temperature of 40°C
± 2°C, a humidity of 90%~95%, and a duration of 48h.
voltage electrical machine or components can be removed from the test
chamber for testing, but shall be completed within 6h. If there is any doubt about
the insulation breakdown, it is permissible to retest immediately without
changing the test state. The test voltage is still in accordance with the provisions
of Clause 3.
4.6 Running performance check
The check of running performance of the electrical machine shall be completed
within 48h after the test specimen is removed from the chamber. The check of
running performance shall be carried out in the way of power running. The
performance requirements of electrical machine are specified by various
professional product standards.
5 Inspection rules
5.1 General
The damp-heat test shall be carried out when the product design stereotype or
design, process and material used changes affect the damp-heat resistance of
the product.
Whether the product is subjected to regular sampling test and its deadline are
regulated by various professional product standards.
5.2 Sampling method of sample
The damp-heat test of the electrical machine allows a representative product to
be sampled by a random sampling method in a series of products of the same
structure, the same process, and the same material. If the test is qualified, the
products with the same structure, the same process, and the same material
(including the derived series and the same product with the same high range of
the center) are all qualified.
5.3 Number of test specimen
For the electrical machine for damp-heat test, the number of parts and
components shall follow the provisions.
- for the electrical machine with center height of 315mm and below, test 2
pieces each time;
- for the large electrical machine with center height above 315mm, test 1
piece each time;
- for large AC electrical machine with center height above 630mm and large
DC electrical machine with armature outer diameter of 990mm or more,
......
GB/T 12665-2008
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.040
K 20
Replacing GB/T 12665-1990
Requirements of damp-heat testing of electrical machine
for service in general environmental condition
ISSUED ON. JUNE 13, 2008
IMPLEMENTED ON. MARCH 01, 2009
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 4
2 Normative References ... 4
3 Test method ... 4
4 Technical requirements ... 7
5 Inspection rules ... 10
Foreword
This Standard replaces GB/T 12665-1990 Requirements of damp-heat testing of electrical
machine for service in general environmental condition.
Compared with GB/T 12665-1990, the main changes of this Standard are as follows.
— Update the reference standards;
— Add the severity condition 55°C to damp-heat test in 3.2;
— Update figure 1;
— Add the article “3.4 Measurement of leakage current”;
— Change the “alternate damp-heat test” to be “damp-heat test” in 4.1.
This Standard was proposed by China Electrical Equipment Industrial Association
(CEEIA).
This Standard shall be under the jurisdiction of Subcommittee 1 of Low-power Electric
Machine of National Technical Committee 26 on Electric Rotating Machinery of
Standardization Administration of China.
Drafting organizations of this Standard. China National Electric Apparatus Research
Institute (CEI), and Hengdian Group Lianyi Electrical Machine Co., Ltd.
Main drafting staffs of this Standard. Yan Jinglian, Liao Guoqing, and Shen Tujun.
This Standard replaces the following historical edition.
— GB/T 12665-1990.
Requirements of damp-heat testing of electrical machine
for service in general environmental condition
1 Scope
This Standard specifies the damp heat test method, technical requirements and inspection
rules of the rotating electrical machine for service in general environmental condition.
This Standard is applicable to all kinds of rotating electrical machines (except mini-type
control machine, hereinafter referred to as electrical machine). According to provisions of
GB 755, the relative humidity of service environment is. the average maximum relative
humidity in the wettest month is 90%; and the average lowest temperature in that month is
not higher than 25°C; it shall meet the requirements of this Standard.
2 Normative References
The articles contained in the following documents have become part of this Standard
when they are quoted herein. For the dated documents so quoted, all the modifications
(excluding corrections) or revisions made thereafter shall not be applicable to this
Standard. For the undated documents so quoted, the latest editions shall be applicable to
this Standard.
GB 755-2000 Rotating electrical machines - Rating and performance (idt IEC
60034-1.1996)
GB/T 2423.3-2006 Environmental testing for electric and electronic products - Part 2.
Testing method test Cab. Damp heat Steady state (idt IEC 60068-2-78.2001)
GB/T 2423.4-1993 Basic environmental testing procedures for electric and electronic
products-Test Db. Damp heat, cyclic (eqv IEC 60068-2-78.1985)
3 Test method
3.1 Preparation before the test
3.1.1 Test equipment and instruments
Damp heat test chamber shall meet the requirements in Chapter 3 of GB/T 2423.4-1993.
The voltage class of megameter for measuring insulation resistance shall meet the
provisions in Table 1.
3.4 Leakage current measurement
After damp heat test, the leakage current of the electrical machine shall comply with the
provisions of the relevant product standards.
3.5 Withstand-voltage test
After measuring insulation resistance and leakage current of test samples, the insulation
withstand-voltage test shall be immediately carried out, which shall be generally in the test
chamber; when conditions do not permit, the high-voltage electrical machines or
components and parts can be removed from the test chamber for testing, however, it must
be completed within 6 h. If there is doubt on the insulation breakdown, it allows re-testing
immediately without changing the test status, and the test voltage shall be still based on
the provisions of Chapter 4.
3.6 Operating performance inspection
The inspection on the operating performance of electrical machine shall be completed
within 48h after being removed from the test chamber; the operating performance
inspection shall be carried out in energizing and operation; and the performance
requirements of electrical machine shall be specified by the various professional product
standards.
4 Technical requirements
4.1 Insulation performance
The complete electrical machine or components and parts (only for large electrical
machines) shall meet the following conditions after damp heat test specified in Article 3.2.
4.1.1 The insulation requirements of complete electrical machine after damp
heat test
The complete electrical machine shall meet the following requirements after damp heat
test.
a) The insulation resistance of the electrical machine windings against shell and the
windings shall not be less than the following values.
The electrical machine with the rated voltage of 220 V and above shall be
determined according to formula (1).
R P
... (1)
Where.
R — the insulation resistance of the electrical machine windings, in megaohms
The middle-large electrical machine can be installed with anti-damp heater; the heater
power shall be able to make the temperature inside the shell 5 °C higher than room
temperature, and ensure that the heating temperature cannot cause its nearby insulation
more than the allowable temperature of this insulation.
The damp heat test can not be carried out on the electrical machine installed with heater.
4.4 Others
When the constant damp heat test is carried out on the relevant professional products
according to 3.2, it shall be according to the specified corresponding test cycles and the
technical requirements after damp heat test, but shall not be less than the requirements
specified in this Standard.
The damp heat test cannot be carried out on the large steam turbine generator and
hydraulic generator and whether to install heater shall be consulted and determined by the
user with the manufacturer.
5 Inspection rules
5.1 Overview
Damp heat test shall be carried out under the following conditions.
When the damp heat resistance performance affecting product is changed by the
product design finalizing or design, process and materials are used.
Whether to carry out regular sampling test on products and its deadline shall be
specified by various professional product standards.
5.2 Sampling method
The damp heat test of the electrical machine allows to sample the representative products
for testing in a random sampling method in the same series of products with
same-structure, same-process and same-material; if passing the test, it shall be accepted
that the products with same-structure, same-process and same-materials (including the
derived series and the similar products with the same center height range) are qualified.
5.3 Number of test samples
For the electrical machine under damp heat test, the number of components and parts
shall be according to the following provisions.
For the electrical machine with the center height of 315 mm and below, 2 sets shall be
tested for each time.
For the medium and large electrical machine with the center height of above 315 mm,
1 set shall be tested for each time.
......
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