GB/T 10228-2023 English PDF (GBT10228-2023)

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GB/T 10228-2023: Technical parameters and requirements for dry-type power transformers
GB/T 10228-2023
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.180
CCS K 41
Replacing GB/T 10228-2015
Technical Parameters and Requirements for Dry-Type
Power Transformers
ISSUED ON: MAY 23, 2023
IMPLEMENTED ON: DECEMBER 01, 2023
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative References ... 5
3 Terms and Definitions ... 6
4 Property Parameters ... 6
5 Technical Requirements ... 13
6 Inspection Rules and Methods ... 14
7 Marking, Packaging, Transportation and Storage ... 15
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1: Rules for the Structure and Drafting of Standardizing Documents.
This Document replaced GB/T 10228-2015 Specification and Technical Requirements for Dry-
Type Power Transformers. Compared with GB/T 10228-2015, the major technical changes of
this Document are as follows besides the structural adjustments and editorial modifications:
--- Reduce the no-load loss of Level-6kV and Level-10kV non-excitation voltage regulating
distribution transformers by an average of about 20% respectively; and reduce the no-
load current (rated capacity of 250kVA and above) by an average of about 20%
respectively (see Table 1 of this Edition; Table1 of the 2015 Edition);
--- Reduce the no-load loss of Level-6kV and Level-10kV non-excitation voltage regulating
power transformers by an average of about 20% respectively; and reduce the no-load
current by an average of about 20% (see Table 2 of this Edition; Table 2 of the 2015
Edition);
--- Reduce the no-load loss of Level-6kV and Level-10kV on-load voltage regulating
distribution transformers by an average of about 20% respectively; and reduce the no-
load current by an average of about 20% (see Table 3 of this Edition; Table 3 of the 2015
Edition);
--- Reduce the no-load loss of the Level-20kV non-excitation voltage regulating distribution
transformer by an average of about 10% respectively; and reduce the no-load current by
an average of about 10% respectively (see Table 4 of this Edition; Table 4 of the 2015
Edition);
--- Reduce the no-load loss the Level-35kV non-excitation voltage regulating distribution
transformer by an average of about 10% respectively; and reduce the no-load current by
an average of about 10% respectively (see Table 5 of this Edition; Table 5 of the 2015
Edition);
--- Reduce the no-load loss of the Level-35kV non-excitation voltage regulating power
transformer by an average of about 10% respectively; and reduce the no-load current by
an average of 10% respectively (see Table 6 of this Edition; Table 6 of the 2015 Edition);
--- Reduce the no-load loss of the Level-35kV on-load voltage regulating power transformer
by an average of about 10% respectively; and reduce the no-load current by an average
of 10% respectively (see Table 7 of this Edition; Table 7 of the 2015 Edition);
--- Modify "different insulation system temperature" to "different insulation heat resistance
grades"; and change the expression (see Clause 4 of this Edition; Clause 4 of the 2015
Edition);
--- Made the corresponding adjustments to the inspection rules and methods (see Clause 6
of this Edition; Clause 6 of the 2015 Edition).
This Document was proposed by China Electrical Equipment Industry Association.
This Document shall be under the jurisdiction of National Technical Committee on Transformer
of Standardization Administration of China (SAC/TC 44).
Please note some contents of this Document may involve patents. The issuing agency of this
Document shall assume the responsibility to identify these patents.
Drafting organizations of this Document: Shenyang Transformer Research Institute Co., Ltd.;
Sunten Electric Equipment Co., Ltd.; Shanghai Huguang Transformer Co., Ltd.; Pearl Electric
Co., Ltd.; Chint Electric Co., Ltd.; China Electric Power Research Institute Co., Ltd.; Wolong
Electric Group Beijing Huatai Transformer Co., Ltd.; Haihong Electric Co., Ltd.; Guangzhou
CRRC Junfa Electric Co., Ltd.; TBEA Intelligent Electric Co., Ltd.; Xi’an High Voltage
Apparatus Research Institute Co., Ltd.; Tianjin Tebian Electric Transformer Co., Ltd.; Hainan
Jinpan Smart Technology Co., Ltd.; Guangdong Kang Dewei Electrical Co., Ltd.; Shenyang
Zhongbian Electric Co., Ltd.; Jiangsu Yawei Transformer Co., Ltd.; Baoding Tianwei Shunda
Transformer Co., Ltd.; Chenglai Electric Technology Co., Ltd.; Zhejiang Jiangshan
Transformer Co., Ltd.; Hefei Yuanzhen Power Technology Co., Ltd.; Chongqing Wangbian
Electric (Group) Corp., Ltd.; Wuhu Jinniu Electric Co., Ltd.; Wujiang Transformer Co., Ltd.;
TBEA Hunan Electrical Co., Ltd.; Shandong Dachi Electric Co., Ltd.; Tiansheng Electric Co.,
Ltd.; and Electric Power Research Institute of Guangdong Power Grid Co., Ltd.
Chief drafting staffs of this Document: Zhang Zhongguo, Yi Jiliang, Yang Miao, Long Ye, Cai
Dingguo, Li Jingbiao, Fu Chao, Qi Yingshi, Han Yu, Xu Kaixuan, Fan Jianping, Fang Yujie,
Lixuan jiannan, Zhao Wenzhong, Li Zhiguo, Wang Wenguang, Tian Guishu, Tian Zhengwen,
Qin Jinli, Zheng Guopei, Jiang Zhenjun, Xiong Shifeng, Zou Hong, Liu Chaofeng, Lin Canhua,
Xu Jianjun, Zhang Jilan, Zhou Xiaoya, and Lin Chunyao.
This Document was first-time published in 1988; first-time revised in 1997; second-time
revised in 2008; third-time revised in 2015; it is fourth-time revised hereby.
Technical Parameters and Requirements for Dry-Type
Power Transformers
1 Scope
This Document specifies the performance parameters, technical requirements, inspection rules
and methods, marking, packaging, transportation and storage of dry-type power transformers.
This Document is applicable to non-excitation and on-load voltage regulation three-phase dry-
type power transformer with rated capacity of 30kVA and above, rated frequency of 50Hz,
indoor use, electrical steel made of iron core, and voltage levels of 6kV, 10kV, 20kV and 35kV.
This Document does not apply to gas-filled transformers.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 191 Packaging – Pictorial Marking for Handling of Goods
GB/T 1094.1 Power transformers - Part 1: General
GB/T 1094.11 Power transformers - Part 11: Dry-type transformers
GB/T 1094.12 Power transformers - Part 12: Loading guide for dry-type power
transformers
GB/T 2900.95 Electrotechnical terminology - transformers, voltage regulators and reactors
GB/T 5273 Terminals for transformers, high-voltage apparatus and bushings
GB/T 5465.2 Graphical symbols for use on electrical equipment - Part 2: Graphical
symbols
JB/T 501 Test guide for power transformers
JB/T 10088 Sound level for 6kV~500kV power transformers
6.2.3 The winding resistance unbalance rate shall be calculated by taking the maximum value
minus the minimum value of the three-phase measured value as the numerator, and the three-
phase measured average value as the denominator.
6.2.4 The resistance values between all corresponding terminals shall be measured and
compared.
6.3 Insulation resistance measurement
The insulation re...