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GB 20840.4-2015: [GB/T 20840.4-2015] Instrument transformers -- Part 4: Additional requirement for combined transformers
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Basic data | Standard ID | GB 20840.4-2015 (GB20840.4-2015) | | Description (Translated English) | [GB/T 20840.4-2015] Instrument transformers -- Part 4: Additional requirement for combined transformers | | Sector / Industry | National Standard | | Classification of Chinese Standard | K41 | | Classification of International Standard | 29.180 | | Word Count Estimation | 22,287 | | Date of Issue | 2015-05-15 | | Date of Implementation | 2016-06-01 | | Older Standard (superseded by this standard) | GB 17201-2007 | | Quoted Standard | GB 311.1; GB/T 2421.1; GB/T 2423.23; GB/T 2423.55; GB 4208-2008; GB/T 4798.3; GB/T 4798.4; GB/T 5169.2; GB/T 5169.9; GB/T 5169.18; GB/T 5465.2; GB/T 7354; GB 7674; GB/T 8905; GB/T 11021; GB/T 11022; GB/T 11604; GB/T 15022.1; GB/T 15022.2; GB/T 15022.4; GB/T 16927.1; GB/T 17623; GB/T 20138-2006; GB/T 21221; GB/T 21429; JB/T 5895; IEC 60296; IEC 60376; IEC 61634; IEC 62155; IEC 62271-2; IEC GUIDE 109; ISO 3231; GB/T 2423.17; GB 20840.1-2010; GB 20840.2-2014; GB 20840.3-2013 | | Adopted Standard | IEC 61869-4-2013, MOD | | Regulation (derived from) | National Standard Announcement 2015 No. 15 | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | | Summary | This Standard applies for electrical measuring instruments and electrical protective device, the frequency of new combinations of manufacture of transformers 15Hz ~ 100Hz. Requirements and tests in this section, as well as GB 20840.1, GB 20840.2 and GB 20840.3 included current transformers and electromagnetic voltage transformer requirements and tests are all combined transformer necessary. | GB 20840.4-2015: [GB/T 20840.4-2015] Instrument transformers -- Part 4: Additional requirement for combined transformers
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Instrument transformers.Part 4. Additional requirement for combined transformers
ICS 29.180
K41
National Standards of People's Republic of China
Replacing GB 17201-2007
Transformer Part 4. Combination transformer
Additional technical requirements
Instrumenttransformers-Part 4. Additionalrequirementsfor
(IEC 61869-4.2013, MOD)
Issued on. 2015-05-15
2016-06-01 implementation
Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China
Standardization Administration of China released
Table of Contents
Preface Ⅰ
Introduction Ⅲ
1 Scope 1
2 Normative references 1
3 Terms and definitions
3.1 General definitions 1
3.7 Symbol and name 3
Rating 3 5
5.401 measurement and protection requirements of complementary technologies Combined Transformer 3
Design and construction of 6 4
Temperature rise of 6.4 pairs of parts and components of claim 4
6.13 mark 4
7 Test 5
7.1 General requirements 5
7.2 Type 6 test
7.3 Routine tests 11
Appendix 4A (informative) of this section with IEC 61869-4.2013 structure change compared to the situation 12
Appendix 4B (informative) of this section with IEC 61869-4.2013 technical differences and the reasons 13
Interaction Appendix 4C (normative) current transformers and voltage transformers 14
4C.1 influence of magnetic field on a current carrying conductor voltage transformer Error 14
4C.2 influence the applied voltage on the error of current transformers 14
Appendix 4D (Information Appendix) IEC 61869-4.2013 geometric layout of the test circuit conductors back distance a 16
Fig 401 geometrical arrangement of the test circuit 9
Figure 402 0.2 voltage transformer errors 10
Figure 403 current transformer measuring the voltage drop Ui 10
Figure 404 0.2 current transformer 5% of the rated current of error 11
Current-carrying conductor and magnetic field influence Figure 4C.1 voltage transformer 15
Table 11 Test item 5
This section table 4A.401 and IEC 61869-4.2013 clauses No. 12 control cases
This section table 4A.402 and IEC 61869-4.2013 case control chart No. 12
Table 4B.401 this section with IEC 61869-4.2013 technical differences and the reasons 13
Table 4D.401 IEC 61869-4.2013 test circuit layout geometry in the distance a 16 conductor returns
Foreword
Part 1, Chapter 2, Section 3, Chapter 4 and 7.4, 7.5 and Chapter 8 are recommended, the rest are mandatory.
GB 20840 "transformer" intends divided into the following sections.
--- Part 1. Common technical requirements;
--- Part 2. additional technical requirements current transformer;
--- Part 3. Supplementary technical requirements of electromagnetic voltage transformer;
--- Part 4. Combined Transformer additional technical requirements;
--- Part 5. additional technical requirements for capacitor voltage transformer;
--- Part 6. Low-power transformers supplementary common technical requirements;
--- Part 7. Electronic voltage transformers supplementary technical requirements;
--- Part 8. Electronic current transformers additional technical requirements;
--- Part 9. Transformer digital interface;
--- Part 10. Supplementary independent current sensor technology low power requirements;
--- Part 11. Low-power complementary technologies independent voltage sensor requirements;
--- Part 12. Combined electronic transformer and complementary combination of technical requirements independent of the sensor;
--- Part 13. Independent merging unit;
--- Part 14. DC current transformer additional technical requirements;
--- Part 15. DC voltage transformer of additional technical requirements.
This is Part 4 GB 20840's.
This section drafted in accordance with GB/T 1.1-2009 given rules.
This Part replaces GB 17201-2007 "combined transformer."
This part of GB 20840.1-2010 "transformers - Part 1. General technical requirements", GB 20840.2-2014 "first transformer
Part 2. Supplementary requirements for current transformer technology "and GB 20840.3-2013" transformers - Part 3. Electromagnetic Voltage Transformer complement
Charge technical requirements "supporting the use of. This section follows the structure written in GB 20840.1, GB 20840.2 and GB 20840.3, is the standard for these
Quasi corresponding provisions of additions and modifications. When the terms of GB 20840.1, GB 20840.2 and GB 20840.3 in this section is not to mention timely,
As long as reasonable, these provisions also apply to this section. When specified in this section, "add", "modification" or "replacement" when it means
The relevant provisions of GB 20840.1, GB 20840.2 and GB 20840.3 in this section is adapted accordingly.
For GB 20840.1-2010, GB 20840.2-2014 and GB 20840.3-2013 on the basis of supplementary chapters, bar graph,
Tables, notes and appendices, this section uses the following forms of ID.
--- Chapter, bar, graphs, tables, and note the number 401 from the beginning;
--- Appendix No. 4A, 4B and the like.
This section uses redrafted law revision using IEC 61869-4.2013 "Transformers - Part 4. Supplementary transformer technology portfolio to
begging".
This part of IEC 61869-4.2013 compared to appropriate adjustments in the structure, are listed in the Appendix of this section 4A and IEC 61869-4.
Chapter, article, figure, table number 2013 of the control list.
Technical differences exist compared to 2013, the terms of these differences have been involved through gaps in its outer margin. This part of IEC 61869-4
A single vertical line at position (|) have been identified in Appendix 4B shows the corresponding list of technical differences and their causes.
This section also made the following editorial changes.
--- Increasing the "Introduction";
--- Deleted Chapter 4, Chapter 8, 9, and Chapter 10 of the chapter headings;
--- Remove the IEC 61869-4.2013 is 7.3.1.301 title bar, the contents of which fall under 7.3.1 (This section 7.3.2) in;
--- Increase the informative appendix 4D, the IEC 61869-4. geometric layout of the test circuit in 2013 have not been used in conductors
Back away from a column in the Appendix.
This part is proposed by the China Electrical Equipment Industrial Association.
This part of the National Standardization Technical Committee transformers (SAC/TC222) centralized.
This section is drafted. Shenyang Transformer Research Institute Co., Ltd., State Grid Electric Power Research Institute, Dalian first transformer limited liability
Any company, Dalian Northern Transformer Group Co., Ltd., Ningbo Huatong Transformer Manufacturing Co., Ltd., TBEA Kangjia (Shenyang) transformers have
Limited liability company, State Grid Electric Power Co., Ltd. of Liaoning Province Electric Power Research Institute, Zhongshan City, Thailand Electric Co., Jiangxi Power Electric Co.,
Company Jiang Su Kexing Electric Co., Ltd., Dalian second transformer Group Co., Ltd. Zhejiang sky Transformer Co., Ltd., Chongqing Huahong meter
Ltd., Chint Electric Co., Ltd., Hengyang Huarui Electric Co., Ltd.
The main drafters of this section. Zhangzhong country, Yeguo Xiong, Yu Sha Chau, Wang Ren Tao, He Chunan, Liu Yufeng, Zhangjun Yang, Heze Jian, Zhang Aimin,
CAI Qiang, Teng Shou-wide, Xu, Qinjiang Feng, Meng Xin-zhi, Cengxiang Shun, Wang Yang.
This part of the standard replaces the previous editions are.
--- GB 17201-2007.
Introduction
IEC /TC38 standard system has been realigned, before the upcoming IEC 60044 series of standards is now readjusted
IEC 61869 series of standards. In order to better use of international standards, the National Standardization Technical Committee transformers (SAC/TC222) The study
Decided to our current system of national standards Transformer also press IEC /TC38 new standard system be realigned before the upcoming
The individual transformers to national standards IEC 60044 series of standards by the corresponding relationship between IEC 61869 series of standards correspond to re
Develop, constitute a "common technical requirements" general part and each "Supplementary technical requirements" section dedicated supporting new Transformers series Country
standard.
New national standards for transformers intended to form the overall situation is as follows.
Standard general part and special part of the standard name special part of the standard number corresponding to the name of the original Standard
GB 20840.1
General technical requirements
GB/T 20840.6
Low-power transformers
Supplementary general skills
Requires surgery
Supplementary technical requirements GB 20840.2 current transformer
GB 1208
GB 16847
Complementary technology GB 20840.3 Electromagnetic Voltage Transformer requirements GB 1207
GB 20840.4 Combined Transformer supplementary technical requirements of GB 17201
GB/T 20840.5 additional technical requirements for capacitor voltage transformers GB/T 4703
GB/T 20840.7 additional technical requirements for electronic voltage transformer GB/T 20840.7
GB/T 20840.8 electronic current transformer additional technical requirements
GB/T 20840.9 Transformer Digital Interface
Supplementary technical requirements GB/T 20840.10 low power independent current sensor
GB/T 20840.8
GB/T 20840.11 complementary technologies independent low power voltage sensor requirements GB/T 20840.7
GB/T 20840.12
A combination of electronic transformer and combinations of independent sensors
Additional technical requirements
GB/T 20840.13 merge independent unit -
GB/T 20840.14 DC current transformer additional technical requirements -
GB/T 20840.15 DC voltage transformer of additional technical requirements -
Transformer Part 4. Combination transformer
Additional technical requirements
1 Scope
GB 20840 for this section applies to electrical measuring instruments and electrical protective device, a frequency of 15Hz ~ 100Hz of new manufacturing
Combination transformer.
Requirements and tests in this section, as well as current transformers and electromagnetic GB 20840.1, GB 20840.2 and GB 20840.3 included
Voltage transformer requirements and test transformers are all necessary combinations.
401 Note. This section is based on a combination of single-phase transformer-based, but is also applicable to the relevant part of the combination of three-phase transformers.
2 Normative references
The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein
Member. For undated references, the latest edition (including any amendments) applies to this document.
Chapter 2 GB 20840.1-2010 content with the addition of the following apply.
GB 20840.1-2010 transformers - Part 1. General Requirements (IEC 61869-1.2007, MOD)
GB 20840.2-2014 transformers - Part 2. Additional technical requirements for current transformers (IEC 61869-2.2012, MOD)
GB 20840.3-2013 transformers - Part 3. Electromagnetic Voltage Transformer additional technical requirements (IEC 61869-3.2011,
MOD)
3 Terms and Definitions
GB 20840.1-2010, GB 20840.2-2014 GB 20840.3-2013 and as defined in the following terms and definitions apply
This document.
3.1 General definitions
3.1.401
Combined Transformer combinedinstrumenttransformer
A combination of current transformers and voltage transformers integral transformers.
3.1.402
Voltage transformer voltage error voltageerrorofvoltagetransformer
εv
When the ratio of the current transformer voltage transformer did not pass current determining the difference.
3.1.403
Phase voltage transformer phasedisplacementofvoltagetransformer
δv
When the current transformer voltage transformer did not pass current determining retardation.
3.1.404
Rated continuous influenza should thermoelectric voltage voltageinducedbyratedcontinuousthermalcurrent
Uv
Current transformer rated continuous thermal current in the voltage transformer induced voltage, voltage error is defined as a measure of the maximum amount of change.
3.1.405
The maximum amount of change of the voltage error greatestvariationofvoltageerror
Δεv
Current transformer rated continuous influenza should thermoelectric voltage maximum amount of change caused by the voltage transformer ratio difference possible.
3.1.406
The maximum amount of change in voltage transformer phase difference greatestvariationofphasedisplacement
Δδv
Current transformer rated continuous influenza should thermoelectric voltage phase voltage transformer caused the maximum possible amount of change.
3.1.407
Integrated voltage error of the absolute value of absolutevalueofthevariationsofvoltageerror
ε'v
The ratio of the difference between the maximum amount of change in voltage at a predetermined voltage error voltage transformer with both the absolute value of the sum.
3.1.408
Phase voltage transformer integrated absolute value absolutevalueofthevariationsofphasedisplacementofvoltagetrans-
former
δ'v
The maximum amount of change with a predetermined phase retardation voltage voltage transformer, both the absolute value of the sum.
3.1.409
Rated short influenza should thermoelectric voltage voltageinducedatratedshort-timethermalcurrent
Ue
Current transformer rated short-time thermal current in the voltage transformer voltage induced on the nameplate.
3.1.410
Current transformer current error currenterrorofcurrenttransformer
εi
When the ratio of the current transformer voltage transformer unexcited determined difference.
3.1.411
Current transformer phase phasedisplacementofcurrenttransformer
δi
Current transformers for voltage transformer unexcited determine retardation.
3.1.412
Current transformer capacitive current voltage generated voltagegeneratedinthecurrenttransformerbycapacitivecurrent
Ui
Voltage transformer voltage is applied to generate a voltage across the capacitor current generated in the current transformer, the current error is defined as the maximum amount of change
Measure.
3.1.413
The maximum amount of change greatestvariationofcurrenterror current error
Δεi
Capacitive current generated by the current transformer voltage caused by the current transformer ratio difference between the maximum possible amount of change.
3.1.414
The maximum amount of change of phase current transformers greatestvariationofphasedisplacement
Δδi
Capacitive current generated by the current transformer current transformer voltage caused retardation maximum possible amount of change.
3.1.415
Integrated absolute value of the current error absolutevalueofthevariationsofcurrenterror
ε'i
Current error maximum change in current transformer ratio difference with a predetermined current, the sum of the absolute values of both.
3.1.416
The absolute value of the current transformer phase synthesis absolutevalueofthevariationsofphasedisplacementofcurrenttrans-
former
δ'i
The maximum amount of change with a predetermined phase retardation current current transformer, both the absolute value of the sum.
3.7 Symbol and Name
GB 20840.1-2010 3.7 with the following alternatives.
εv voltage transformer voltage error
δv phase voltage transformer
Uv rated continuous voltage corresponding thermoelectric flu
The maximum amount of change of the voltage error Δεv
Rated secondary voltage Usr
The maximum amount of change of phase voltage transformer Δδv
Integrated voltage error of the absolute value of ε'v
Integrated absolute value of the phase difference between the voltage transformer δ'v
Rated short-time thermal current Ith
Icth rated continuous thermal current
Ue rated short influenza should thermoelectric voltage
εi current transformer current error
δi phase current transformer
Voltage Ui current transformer capacitive current generated
The maximum amount of change Δεi current error
The maximum amount of change of phase current transformers Δδi
Integrated absolute value of the current error ε'i
Integrated current transformer phase difference absolute value δ'i
Isr rated secondary current
5 RATINGS
GB 20840.1-2010, GB 20840.2-2014 and Chapter 5 GB 20840.3-2013 content with the addition of the following apply.
5.401 measurement and protection requirements with a combination of complementary technologies transformer
5.401.1 General requirements
Combination transformer measuring error limits, should be consistent with GB 20840.2-2014 in 5.6.201 measuring current transformer requirements
And GB 20840.3-2013 in 5.6.301 for measuring voltage transformer requirements. Transformer protection with a combination of error limits, should be consistent
GB 20840.2-2014 in 5.6.202 of protective current transformer and GB 20840.3-2013 requirements for the protection of electricity in 5.6.302
Pressure transformer requirements.
5.401.2 interaction
When the current transformer to run between 5% of the rated current and the rated thermal current, voltage transformer at a predetermined load range and in
Between 80% and 120% of rated voltage, the voltage and phase error should not exceed the limits of their respective accuracy class.
When the voltage between the transformer due to multiple rated voltage operation at 80% of rated voltage and rated voltage, current transformer at a predetermined negative
Charge current range and range accuracy class requirements, the current error and phase accuracy class shall not exceed the corresponding limits.
See 7.2.6.401 and 7.2.6.402 and Appendix 4C.
6 design and construction
GB 20840.1-2010, GB 20840.2-2014 and GB 20840.3-2013 6th chapter are applicable to the following additions.
6.4 pairs of parts and components of the temperature requirements
6.4.1 General requirements
GB 6.4.1 with the following additions to the content 20840.2-2014 apply.
If the voltage is applied in line with GB 20840.3-2013 specified in 7.2.2, and the current transformer primary current carried by the rated continuous
Thermal current, the combined transformer temperature rise should not exceed the values specified in 6.4 GB 20840.1. At this time, the current transformer connected to power
1 load factor corresponding to the rated output voltage transformer and connect power factor of 0.8 (lagging) to 1 between rated load, or
A plurality of rated load maximum rated load. 10K additional margin of voltage transformer under certain circumstances permit (see GB 20840.3-
2013 7.2.2) also applies to the combination of the current transformer transformer.
6.13 mark
6.13.401 terminal markings
Combined Transformer current transformer and voltage transformer terminal markings alone the same transformer, marked a manner in accordance with
GB 20840.2-2014 GB 20840.3-2013 in 6.13.201 and 6.13.301 of the regulations.
6.13.402 nameplate
6.13.402.1 Universal Content
Current transformer nameplate shall GB 20840.2-2014 Technical characteristics of the mark in 6.13.202, voltage transformer nameplate shall
Technical characteristics according to GB 20840.3-2013 in 6.13.302 of the mark.
6.13.402.2 combination transformer nameplate
Nameplate shall be marked with the current flowing through the transformer rated short-time thermal current root-mean-square value of the induced voltage transformer voltage Ue value, in which case electricity
Voltage transformer primary winding shorted. This induced voltage is measured at the terminals connected to the voltage transformer 15VA or secondary winding rated load
Obtained.
401 Note. Instead rated short-time thermal current root-mean-square value of the induced voltage Ue, nameplate marked the induced voltage and current transformer ratio of the current flowing to each
Millivolt kA representation.
7 Test
GB 20840.1-2010, GB 20840.2-2014 GB 20840.3-2013 and the first 7 chapters are applicable to the following additions.
7.1 General requirements
7.1.2 Test Project
Table 11 replaced with the following.
Table 11 pilot projects
Test Clause No.
Type Test 7.2
Temperature Rise Test 7.2.2
One end of the impulse withstand voltage test 7.2.3
Outdoor transformer and humidity test 7.2.4
Electromagnetic compatibility (EMC) test 7.2.5
7.2.6 Accuracy Test
7.2.7 Test enclosure class
Sealing performance test (for gas-insulated products) at ambient temperature 7.2.8
Pressure test (applicable to gas-insulated products) 7.2.9
Short-time current test 7.2.201
Short circuit withstand capability test 7.2.301
Routine tests 7.3
Gas dew point measurement (applicable to gas-insulated products) 7.3.1
One end of the power frequency voltage withstand test 7.3.2
Partial discharge measurement 7.3.3
Capacitance and dielectric loss factor measurement 7.3.4
Inter-segment frequency voltage withstand test 7.3.5
Secondary end frequency voltage withstand test 7.3.6
7.3.7 Accuracy Test
7.3.8 Test mark
Ambient temperature sealing performance test 7.3.9
Pressure test (applicable to gas-insulated products) 7.3.10
Secondary winding resistance (Rct) Determination 7.3.201
Table 11 (continued)
Test Clause No.
Secondary circuit time constant (Ts) measured 7.3.202
Rated inflection potential (Ek) and the lower Ek excitation current test 7.3.203
Inter-turn overvoltage test 7.3.204
Excitation characteristic measurement 7.3.301
Insulating oil Performance Test 7.3.205 or 7.3.302
Special test 7.4
One end of the truncated impulse withstand voltage test 7.2.3.301 and 7.4.1
Repeatedly cut off one end of the impact test 7.4.2
Pass overvoltage tests 7.4.3
Mechanical strength test 7.4.4
Internal arc fault test 7.4.5
Sealing performance test (for gas-insulated products) under low and high temperature 7.4.6
7.4.7 Corrosion Test
Fire hazard testing 7.4.8
7.5 Sampling Test
Remanence coefficient measurement 7.5.1
Measuring current transformer measurement instrument security factor (FS) 7.5.2
7.2 Type tests
7.2.2 Temperature Rise Test
GB 20840.1-2010 7.2.2 the first sentence with the following alternatives.
The test is to verify compliance with the requirements of 6.4.1.
GB 20840.1-2010, GB 20840.2-2014 GB 20840.3-2013 7.2.2 and the content of the following additions apply.
When there is a plurality of secondary windings, in addition to manufacturing and users agree otherwise, the test should be connected to the respective load rating in each of the secondary windings
get on. To test, combined transformer installation should represent the state of its runtime installed. Current and voltage is applied simultaneously to the provisions of
A combination of the transformer. To this end, the current transformer supplying large current transformer, the primary and secondary windings with each other in accordance with the grid should
Full voltage insulation.
If no such transformers, it is recommended that the other two pilot programs.
a) a combination of the insulation transformer installation. A high voltage is applied to the terminal while the seat frame, the enclosure, the primary winding operation are generally intended to ground
And one terminal of each secondary winding and the primary winding connected to the operation of the proposed power line terminals are grounded. Thereby supplying a large electric
Flow of high-voltage transformer does not require insulation.
b) a high voltage is applied to the operation of the proposed power line connected to the terminal. A high voltage terminals shorted and connected to the current transformer. by
Or a plurality of secondary windings are energized current transformer short-circuited primary winding obtained Rated continuous thermal current.
The results of all three methods are the same, is determined by the selection method of manufacturing.
The temperature rise of the winding resistance measurement should be used. For small values of the current transformer primary winding resistance can be measured using a thermocouple.
Winding temperature than other parts of the available thermometer or thermocouple measurement.
7.2.3 a side impact pressure test
7.2.3.1 General requirements
GB 20840.1-2010, GB 20840.2-2014 GB 20840.3-2013 in 7.2.3.1 and the content of the following additions apply.
Shock wave voltage to be applied to short-circuit the current transformer primary winding and voltage transformer primary winding connected to the operation of the proposed high-voltage terminal
on. This wiring method is also applicable to the truncated lightning impulse test and multiple truncated lightning impulse test.
7.2.6 Accuracy test
Effect 7.2.6.401 current transformer voltage transformer
Combined transformer, the effect of the current transformer voltage transformer should test the following requirements.
Current transformer power supply wire should be formed with the primary terminals with high levels of circuit (see FIG. 401). Figure 401 with a return showing
It shall be equal to the distance from the conductor phase power line. The rest of the current loop, respectively, each length should be at least 1.6m. Voltage transformer
The primary winding short circuit wiring ...
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