GB/T 6451-2008 in English

《GB/T 6451-2008油浸式电力变压器技术参数和要求》由TC44（全国变压器标准化技术委员会）归口，主管部门为中国电器工业协会。
本标准适用于电压等级为6kV~500kV、额定容量为30kVA及以上、额定频率为50Hz的油浸式电力变压器。本标准规定了额定容量为30kVA及以上，电压等级为6kV、10kV、20kV、35kV、66kV、110kV、220kV、330kV和500kV三相及500kV单相油浸式电力变压器的性能参数、技术要求、测试项目及标志、起吊、安装、运输和贮存。 本标准代替ＧＢ／Ｔ６４５１―１９９９《三相油浸式电力变压器技术参数和要求》和ＧＢ／Ｔ１６２７４―１９９６《油浸式电力变压器技术参数和要求５００ｋＶ 级》。 本标准与ＧＢ／Ｔ６４５１―１９９９相比主要变化如下：
―――编写格式按ＧＢ／Ｔ１．１―２０００《标准化工作导则　第１部分：标准的结构和编写规则》的规定进
行了修改；
―――标准名称改为《油浸式电力变压器技术参数和要求》；
―――增加了有关２０ｋＶ 级油浸式变压器技术参数和要求的内容；
―――增加了有关５００ｋＶ 级油浸式变压器技术参数和要求的内容，并对５００ｋＶ 级变压器的原有容量规格进行了调整和增补；
―――取消了３５ｋＶ、６６ｋＶ 和１１０ｋＶ 级变压器性能参数表中组ＩＩ的空载损耗和空载电流值；
―――在１１０ｋＶ、２２０ｋＶ 和３３０ｋＶ 级变压器原有容量规格的基础上增补了一些容量规格；
―――对６ｋＶ、１０ｋＶ、３５ｋＶ、６６ｋＶ、１１０ｋＶ、２２０ｋＶ 和３３０ｋＶ 级变压器的性能参数进行了调整。其中６ｋＶ、１０ｋＶ 和３５ｋＶ 级的空载损耗和负载损耗约分别平均下降１０％；６６ｋＶ、１１０ｋＶ 和２２０ｋＶ 级的空载损耗约平均下降５％，负载损耗约平均下降１０％；３３０ｋＶ 级的空载损耗约平均下降１０％，负载损耗约平均下降５％。此外，对各电压等级的空载电流也分别进行了相应的降低；
―――对各电压等级变压器的技术要求均统一进行了增减和修改。

This standard specifies the performance parameters, technical requirements, testing items as well as marking, lifting, installation, transportation and storage of three-phase oil-immersed power transformers with rated capacity of 30 kVA or above and voltage class of 6 kV, 10 kV, 20 kV, 35 kV, 66 kV, 110 kV, 220 kV, 330 kV and 500 kV and those single-phase ones with voltage class of 500 kV.
This standard is applicable to the oil-immersed power transformers with voltage class of 6 kV~ 500 kV, rated capacity of 30 kVA or above and rated frequency of 50 Hz.

Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 6 kV and 10 kV Voltage Classes
4.1 Performance Parameters
4.2 Technical Requirements
4.3 Testing Items
4.4 Marking, Lifting, Installation, Transportation and Storage
5 20 kV Voltage Class
6 35 kV Voltage Class
6.1 Performance Parameters
6.2 Technical Requirements
6.3 Testing Items
6.4 Marking, Lifting, Installation, Transportation and Storage
7 66 kV Voltage Class
7.1 Performance Parameters
7.2 Technical Requirements
7.3 Testing Items
7.4 Marking, Lifting, Installation, Transportation and Storage
8 110 kV Voltage Class
8.1 Performance Parameters
8.2 Technical Requirements
8.3 Testing Items
8.4 Marking, Lifting, Installation, Transportation and Storage
9 220 kV Voltage Class
9.1 Performance Parameters
9.2 Technical Requirements
9.3 Testing Items
9.4 Marking, Lifting, Installation, Transportation and Storage
10 330 kV Voltage Class
10.1 Performance Parameters
10.2 Technical Requirements
10.3 Testing Items
10.4 Marking, Lifting, Installation, Transportation and Storage
11 500 kV Voltage Class
11.1 Performance Parameters
11.2 Technical Requirements
11.3 Testing Items
11.4 Marking, Lifting, Installation, Transportation and Storage
Appendix A (Normative) Tests Negotiated by the Using Unit and Manufacturing Unit
A.1 Long-time No-Load Test
A.2 Oil Flow Electrostatic Test
A.3 Partial Discharge Measurement When Rotating Oil Pump
Figure 1 Welding Position of the Support at the Tank Bottom (Facing to the Long Shaft Direction)
Figure 2 Level 10 kV Double-winding Transformer with Connection Symbols of Dyn11, Yznll or Yyn0
Figure 3 Level 10 kV Double-winding Transformer with Connection Symbol of Ydll
Figure 4 Welding Position of the Support at the Tank Bottom (Facing to the Long Shaft Direction)
Figure 5 Welding Position of the Support at the Tank Bottom (Facing to the Long Shaft Direction)
Figure 6 Level 35 kV Double-winding Transformer with Connection Symbols of Dyn11 or Yyn0
Figure 7 Level 35 kV Double-winding Transformer with Connection Symbol of Yd11
Figure 8 Level 35 kV Double-winding Transformer with Connection Symbol of YNd11
Figure 9 Welding Position of the Support at the Tank Bottom (Facing to the Long Shaft Direction)
Figure 10 Welding Position of the Support at the Tank Bottom (Facing to the Long Shaft Direction)
Figure 11 Level 66 kV Double-winding Transformer with Connection Symbol of YNd11
Figure 12 Level 66 kV Double-winding Transformer with Connection Symbol of Yd11
Figure 13 Welding Position of the Support at the Tank Bottom (Facing to the Long Shaft Direction)
Figure 14 Welding Position of the Support at the Tank Bottom (Facing to the Long Shaft Direction)
Figure 15 Level 110 kV Double-winding Transformer with Connection Symbol of YNd11
Figure 16 Level 110 kV Three-winding Transformer with Connection Symbol of YNyn0d11
Figure 17 Level 220 kV Double-winding Transformer with Low-voltage of 6.3 kV~ 20 kV and Connection Symbol of YNd11
Figure 18 Level 220 kV Double-winding Transformer with Low-voltage of 35 kV~69 kV and Connection Symbol of YNd11
Figure 19 Level 220 kV Three-winding Transformer with Connection Symbol of YNyn0d11
Figure 20 Level 220 kV Three-winding Auto-transformer with Connection Symbol of YNa0dll
Figure 21 Level 330 kV Double-winding Transformer with Connection Symbol of YNd11
Figure 22 Level 330 kV Three-winding Auto-transformer with Connection Symbol of YNa0d11
Figure 23 Level 330 kV Three-winding Transformer with Connection Symbol of YYNyn0d11
Table 1 30 kVA ~ 1,600 kVA Three-phase Double-winding off-circuit-tap-changing Distribution Transformer
Table 2 630 kVA ~ 6,300 kVA Three-phase Double-winding off-circuit-tap-changing Power Transformer
Table 3 200 KVA~ 1,600 KVA Three-phase Double-winding On-load-tap-changing Distribution Transformer
Table 4 50 kVA ~ 1,600 kVA Three-phase Double-winding off-circuit-tap-changing Distribution Transformer
Table 5 800 kVA ~ 31,500 kVA Three-phase Double-winding off-circuit-tap-changing Power Transformer
Table 6 2,000 kVA ~ 20,000 kVA Three-phase Double-winding off-circuit-tap-changing Power Transformer
Table 7 Values of the Vacuum Degree and Positive Pressure of Oil Tank
Table 8 630 kVA~63,000 kVA Three-phase Double-winding off-circuit-tap-changing Power Transformer
Table 9 6,300 kVA~63,000 kVA Three-phase Double-winding on-load-tap-changing Power Transformer
Table 10 Values of the Vacuum Degree and Positive Pressure of Oil Tank
Table 11 6,300 kVA~180,000 kVA Three-phase Double-winding off-circuit-tap-changing Power Transformer
Table 12 6,300 kVA~63,000 kVA Three-phase Three-winding off-circuit-tap-changing Power Transformer
Table 13 6,300 kVA~63,000 kVA Three-phase Double-winding on-load-tap-changing Power Transformer
Table 14 6,300 kVA~63,000 kVA Three-phase Three-winding on-load-tap-changing Power Transformer
Table 15 6,300 kVA~63,000 kVA Three-phase Double-winding off-circuit-tap-changing Power Transformer, with Low Voltage of 35 kV
Table 16 31,500 kVA~420,000 kVA Three-phase Double-winding off-circuit-tap-changing Power Transformer
Table 17 31,500 kVA~300,000 kVA Three-phase Three-winding off-circuit-tap-changing Power Transformer
Table 18 31,500 kVA~240,000 kVA Three-phase Double-winding off-circuit-tap-changing Power Transformer with Low Voltage of 66 kV
Table 19 31,500 kVA~240,000 kVA Three-phase Three-winding off-circuit-tap-changing Auto-power Transformer
Table 20 31,500 kVA~180,000 kVA Three-phase Double-winding on-load-tap-changing Power Transformer
Table 21 31,500 kVA~240,000 kVA Three-phase Three-winding on-load-tap-changing Power Transformer
Table 22 31,500 kVA~240,000 kVA Three-phase Three-winding on-load-tap-changing Auto-power Transformer
Table 23 90,000 kVA~720,000 kVA Three-phase Double-winding off-circuit-tap-changing Power Transformer
Table 24 90,000 kVA~240,000 kVA Three-phase Three-winding off-circuit-tap-changing Power Transformer
Table 25 90,000 kVA~360,000 kVA Three-phase Three-winding off-circuit-tap-changing Auto-power Transformer (Regulating Voltage at Series Winding)
Table 26 90,000 kVA ~ 360,000 kVA Three-phase Three-winding on-load-tap-changing Auto-power Transformer (Regulating Voltage at Series Winding End)
Table 27 90,000 kVA~360,000 kVA Three-phase Three-winding on-load-tap-changing Auto-power Transformer (Regulating Voltage at Medium-voltage Terminal End)
Table 28 90,000 kVA~360,000 kVA Three-phase Three-winding off-circuit-tap-changing Auto-power Transformer (Regulating Voltage at Medium-voltage Terminal End)
Table 29 90,000 kVA~360,000 kVA Three-phase Three-winding on-load-tap-changing Auto-power Transformer (Regulating Voltage at Medium-voltage Terminal End)
Table 30 100 MVA ~ 260 MVA Single-phase Double-winding off-circuit-tap-changing Power Transformer
Table 31 120 MVA ~ 720 MVA Three-phase Double-winding off-circuit-tap-changing Power Transformer
Table 32 120 MVA ~ 334 MVA Single-phase Three-winding off-circuit-tap-changing Auto-power Transformer (Regulating Voltage at Medium-voltage Wire End)
Table 33 120 MVA ~ 334 MYA Single-phase Three-winding on-load-tap-changing Auto-power Transformer (Regulating Voltage at Medium-voltage Wire End)