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GB/T 25301-2021: Resistance welding equipment - Transformers - General specifications applicable to all transformers
Status: Valid GB/T 25301: Evolution and historical versions
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Resistance welding equipment - Transformers - General specifications applicable to all transformers
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GB/T 25301-2021
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| GB/T 25301-2010 | English | 799 |
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Resistance welding equipment -- General specifications applicable to all transformers
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Basic data | Standard ID | GB/T 25301-2021 (GB/T25301-2021) | | Description (Translated English) | Resistance welding equipment - Transformers - General specifications applicable to all transformers | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | J64 | | Word Count Estimation | 30,379 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 25301-2021: Resistance welding equipment - Transformers - General specifications applicable to all transformers
---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Resistance welding equipment-Transformers-General specifications applicable to all transformers
ICS 25.160.30
CCSJ64
National Standards of People's Republic of China
Replace GB/T 25301-2010
Resistance welding equipment transformers are suitable for all
General technical conditions for transformers
(ISO 5826.2014, IDT)
Released on 2021-05-21
2021-12-01 implementation
State Administration of Market Supervision and Administration
Issued by the National Standardization Management Committee
Table of contents
Foreword Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Symbol 3
5 Structure and additional equipment 4
5.1 Thermal protection 4
5.2 Output current induction coil 4
6 Environment and conditions of use 4
6.1 General 4
6.2 Ambient temperature 5
6.3 Humidity 5
6.4 Height 5
6.5 Transportation and storage 5
6.6 Lifting device 5
6.7 Temperature of the cooling liquid 5
7 Test 5
7.1 Test conditions 5
7.2 Type test 6
7.3 Routine test 6
8 Protection against electric shock 6
8.1 Insulation resistance 6
8.2 Dielectric strength 6
8.3 Calibration of the output current induction coil 7
8.4 Protection against electric shock during normal use (direct contact) 7
8.5 Protection against electric shock in the event of a fault (non-direct contact) 8
8.6 Insulation requirements for class Ⅱ transformers 8
9 Thermal rating 8
9.1 General 8
9.2 Temperature rise limit 8
9.2.1 General 8
9.2.2 Winding 8
9.2.3 Accessible surface 9
9.2.4 Other components 9
9.3 Thermal performance test conditions 10
9.3.1 General 10
9.3.2 Test conditions for single-phase AC welding transformers and single-phase transformers connected to rectifiers 10
9.3.3 Test conditions for single-phase inverter welding transformer connected to rectifier 10
9.3.4 Test conditions for the three-phase transformer connected to the rectifier 10
9.3.5 Start of fever test 11
9.3.6 Duration of the fever test 11
9.4 Temperature measurement method 11
9.4.1 General 11
9.4.2 Embedded temperature sensor method 11
9.4.3 Resistance method 11
9.4.4 Surface temperature sensor method 12
9.4.5 Determination of ambient temperature 12
9.4.6 Determination of coolant temperature 12
10 Rated output voltage 12
10.1 General 12
10.2 No-load AC voltage (U20) 12
10.3 No-load DC voltage (U2d) 12
11 No-load current (I10) 13
11.1 General 13
11.2 Measurement methods 13
12 Short circuit voltage (Ucc) 13
13 Output current under load conditions 13
14 Cooling liquid circuit 14
15 Dynamic characteristics 14
16 Nameplate 14
16.1 General 14
16.2 Description 14
17 Operating Instructions 15
Appendix A (informative) Example of nameplate 17
Appendix B (Normative) Correction of high altitude and cooling medium temperature 18
Appendix C (informative) Several defined physical concepts and explanations 19
Appendix D (informative) Model code for AC single-phase transformer 23
References 24
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"
Drafting.
This document replaces GB/T 25301-2010 "General Technical Conditions for Resistance Welding Equipment Applicable to All Transformers", and is in line with GB/T 25301-2010
Compared with.2010, in addition to structural adjustments and editorial changes, the main technical changes are as follows.
---The scope of application of the standard is expanded from transformers for resistance welding machines without rectifiers to transformers with rectifiers (see Chapter 1);
---Adjusted the normative reference documents (see Chapter 2, Chapter 2 of the.2010 edition);
---Added terms and definitions other than those defined by ISO 669 (see Chapter 3);
---Added input current and other symbols (see Chapter 4);
--- Added a chapter on structure and additional equipment (see Chapter 5);
---Increase the dielectric strength test voltage value and test method (see 8.2);
---Added the calibration requirements for the output current induction coil (see 8.3);
---Insulation requirements for class II transformers have been added (see 8.6);
---Added the thermal performance test conditions of various transformers (see 9.3);
---Added no-load current requirements (see Chapter 11);
--- Increased the output current requirements under load conditions (see Chapter 13).
The translation method used in this document is equivalent to ISO 5826.2014 "General technology for resistance welding equipment transformers applicable to all transformers"
Technical Conditions.
The Chinese documents that have consistent correspondence with the normatively cited international documents in this document are as follows.
---GB/T 4208-2017 enclosure protection class (IP code) (IEC 60529.2013, IDT);
---GB/T 8366-2021 Mechanical and electrical requirements for resistance welding resistance welding equipment (ISO 669.2016, IDT);
---GB/T 11021-2014 Electrical insulation heat resistance and representation method (IEC 60085.2007, IDT);
---GB/T 17045-2020 Electric shock protection devices and general parts of equipment (IEC 61140.2016, IDT);
---GB/T 32514.3-2016 Measurement of resistance welding welding current Part 3.Current induction coil (ISO 17657-3.
2005, IDT);
---GB/T 32514.4-2016 Measurement of resistance welding welding current Part 4.Calibration system (ISO 17657-4.2005,
IDT).
Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents.
This document was proposed by the China Electrical Equipment Industry Association.
This document is under the jurisdiction of the National Electric Welding Machine Standardization Technical Committee (SAC/TC70).
Drafting organizations of this document. Hangzhou Kaierda Electric Welding Machine Co., Ltd., Chongqing University of Science and Technology, Tianjin Seven High-Tech Co., Ltd., Shenzhen Hong
Bai Technology Industrial Co., Ltd., Dongguan Pengyuwei Technology Co., Ltd., Yongkang Jiaxiao Welding Automation Equipment Co., Ltd., Shenzhen Meg
Mite Welding Technology Co., Ltd., Shenzhen Ruiling Industrial Co., Ltd., Chengdu Xinwei Welding Technology Co., Ltd., Gaobeidian Chengtai Welding
Equipment Co., Ltd., Chengdu Sanfang Electric Co., Ltd.
The main drafters of this document. Hou Runshi, Yin Limeng, Zhang Haiyong, Han Peiwen, Jin Jianguo, Cheng Haojian, He Zhijun, Wang Wei, Peng Tairan, Shi Xuemin,
Yang Yijun and Wang Gang.
The previous versions of this document and the documents replaced are as follows.
---First published as GB/T 25301-2010 in.2010;
---This is the first revision.
Resistance welding equipment transformers are suitable for all
General technical conditions for transformers
1 Scope
This document specifies the technical conditions for the following types of transformers applicable to resistance welding equipment.
---Single-phase transformer for AC welding, usually working at 50Hz or 60Hz;
---Single-phase transformer connected to rectifier for DC welding, usually working at 50Hz or 60Hz;
---Single-phase inverter transformer connected to rectifier for DC welding, usually working at 400Hz~2kHz;
---Three-phase transformer connected to rectifier used for DC welding, usually working at 50Hz or 60Hz.
For the purposes of this document, the term transformer can refer to a transformer alone or connected to a rectifier (transformer-rectifier unit).
This document is applicable to Type I or Type II protective transformers that comply with IEC 61140.
Note. The requirements of this document can be supplemented by other resistance welding transformer standards, such as ISO 22829 and ISO 10656.
2 Normative references
The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations
Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to
This document.
ISO 669 Resistance welding Resistance welding equipment mechanical and electrical requirements (Resistancewelding-Resistancewelding
equipment-Mechanicalandelectricalrequirements)
ISO 17657-3 Resistance welding welding current measurement Part 3.Current induction coil (Resistance welding-Welding
currentmeasurementforresistancewelding-Part 3.Currentsensingcoil)
ISO 17657-4 Resistance welding welding current measurement Part 4.Calibration system (Resistancewelding-Weldingcur-
rentmeasurementforresistancewelding-Part 4.Calibrationsystem)
ISO 17677-1 Resistance Welding Vocabulary Part 1.Spot Welding, Projection Welding and Seam Welding (Resistancewelding-Vocabulary-
Part 1.Spot,projectionandseamwelding)
IEC 60085 Electrical insulation heat resistance and representation method (Electricalinsulation-Thermalevaluationanddesig-
nation)
IEC 60529 enclosure protection level (IP code) [Degrees of protection provided by enclosures (IP code)]
IEC 61140 Electric shock protection devices and common parts of equipment (Protection against electricshock-Commonas-
pectsforinstalationandequipment)
3 Terms and definitions
The following terms and definitions defined by ISO 669 and ISO 17677-1 apply to this document.
3.1
Transformer-rectifierunit
Connect the transformer to the rectifier.
The output circuit of the transformer contains a full-wave rectifier.
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