GB/T 25121.1-2018 English PDF

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GB/T 25121.1-2018: Railway applications -- Rolling stock equipment -- Capacitors for power electronics -- Part 1: Paper/plastic film capacitors
Status: Valid

GB/T 25121.1: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 25121.1-2018	779	Add to Cart	6 days	Railway applications -- Rolling stock equipment -- Capacitors for power electronics -- Part 1: Paper/plastic film capacitors	Valid
GB/T 25121-2010	RFQ	ASK	6 days	Railway applications -- Rolling stock equipment -- Capacitors for power electronics	Obsolete

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Basic data

Standard ID: GB/T 25121.1-2018 (GB/T25121.1-2018)
Description (Translated English): Railway applications -- Rolling stock equipment -- Capacitors for power electronics -- Part 1: Paper/plastic film capacitors
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: S35
Classification of International Standard: 29.280
Word Count Estimation: 39,313
Date of Issue: 2018-12-28
Date of Implementation: 2019-07-01
Older Standard (superseded by this standard): GB/T 25121-2010
Quoted Standard: GB/T 2423.3; GB/T 2423.22-2012; GB/T 2423.28; GB/T 2423.60; GB/T 4798.5-2007; GB/T 5169.5; GB/T 5169.11-2017; GB/T 13539.1; GB/T 21563; GB/T 32347.1-2015; GB/T 32350.1
Adopted Standard: IEC 61881-1-2010, MOD
Regulation (derived from): National Standard Announcement No. 17 of 2018
Issuing agency(ies): State Administration for Market Regulation, China National Standardization Administration
Summary: This standard specifies the conditions of use, quality requirements and inspection, overload, safety requirements, identification, installation and application guidelines for power electronic capacitors. This standard applies to power electronic capacitors used in rail transit vehicles. The capacitors covered by this standard are rated up to 10 000 V. Operating systems using such capacitors typically operate at frequencies below 15 kHz, while pulse frequencies can reach 5 to 10 times the operating frequency. Capacitors are divided into AC capacitors and DC capacitors. The capacitor is mounted as a component in the housing. This standard does not apply to the following capacitors: 1. Capacitors for induction heating devices operating at frequencies below 50 kHz (see GB/T 3984.1 and GB/T 3984.2);

GB/T 25121.1-2018: Railway applications -- Rolling stock equipment -- Capacitors for power electronics -- Part 1: Paper/plastic film capacitors

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Railway applications--Rolling stock equipment--Capacitors for power electronics--Part 1. Paper/plastic film capacitors ICS 29.280 S35 National Standards of People's Republic of China Replace GB/T 25121-2010 Rail transit rolling stock equipment power electronic capacitor Part 1. Paper/plastic film capacitors Part 1. Paper/plasticfilmcapacitors (IEC 61881-1.2010, MOD) Published on.2018-12-28 2019-07-01 implementation State market supervision and administration China National Standardization Administration issued

Content

Foreword I 1 Scope 1 2 Normative references 1 3 Terms and Definitions 2 4 Conditions of use 6 5 Quality requirements and inspection 7 6 overload 21 7 Safety requirements 21 8 logo 22 9 Installation and Application Guide 23 Appendix A (informative) Waveform 26 Appendix B (Normative) Operating Limits for Capacitors at Sinusoidal Voltage and Maximum Temperature (θmax) as a Function of Frequency 29 Appendix C (Normative Appendix) Example of Measurement Method for Resonant Frequency 31 Reference 33

Foreword

GB/T 25121 "Railway Locomotive Vehicle Equipment Power Electronic Capacitor" is divided into three parts. --- Part 1. Paper/plastic film capacitors; ---Part 2. Non-solid electrolyte aluminum electrolytic capacitors; --- Part 3. Electric double layer capacitors. This part is the first part of GB/T 25121. This part is drafted in accordance with the rules given in GB/T 1.1-2009. This part replaces GB/T 25121-2010 "railway locomotive vehicle equipment power electronic capacitor", and GB/T 25121- Compared with.2010, the main technical changes except editorial changes are as follows. --- Revised the scope of the standard (see Chapter 1, Chapter 1 of the.2010 edition); ---Modified the contents of the normative reference documents (see Chapter 2, Chapter 2 of the.2010 edition); --- Added "Isolation Metallization Design" "Special Non-Isolated Metallization Design" "Series Resistance" "Equivalent Series Inductance" "Heat Balance" "Hot Terms and definitions of time constants (see Chapter 3); --- Removed the term and definition of "continuous duty cycle" and "shell temperature rise" (see Chapter 3 of the.2010 edition); --- Revised "the altitude does not exceed 1400m" as "the altitude does not exceed 2500m" (see 4.1.1, 4.1.1 of the.2010 edition); ---Modified ambient temperature requirements (see 4.1.2,.2010 version 4.1.2); --- Added details of special use conditions (see 4.2); --- Revised the type test content, supplemented with the factory test content and also the type test project (see 5.2.5, Table 2,.2010 edition) 5.1.2, Table 2); --- Increased partial discharge measurement requirements (see 5.2.3 and 5.2.5); --- Increased the measurement of capacitance and tan δ in the factory inspection "For capacitors in the millimeter range, the accuracy can be negotiated between the supplier and the buyer. Determine" (see 5.3); --- Revised the allowable deviation range of capacitance "±10%" to "±5%" (see 5.3.2, 5.3.2 of.2010 edition); --- Modified the terminal test voltage AC capacitor, unified test voltage of self-healing and non-self-healing capacitors (see 5.5.1,.2010) Version 5.5.1); --- Removed the description of "If the voltage is increased by 10% and the duration can be reduced to 2s" (see 5.5.1 of the.2010 edition); --- Removed the description of "capacitor at the highest case temperature" (see 5.5.3 of the.2010 edition); --- Added a description of "If the voltage is increased by 10% and the duration can be reduced to 2s" (see 5.6.1); ---Modified terminal and enclosure test voltage requirements (see 5.6.1, 5.6.1 of the.2010 edition); --- Modified the limit for the maximum inrush current, from the original "^Itest=1.4^IS" to "^Itest=1.1^IS" (see 5.9,.2010 edition) 5.9); --- Revised the "thermal stability test" as "thermal stability test" (see 5.10, 5.10 of the.2010 edition); --- Increased capacitor performance measurement criteria after thermal stability test (see 5.10.2); --- Added test requirements for AC filter capacitors (see 5.10.2, Note 3); --- Revised the content of the routine test voltage and self-healing test of the self-healing test (see 5.11, 5.11 of the.2010 edition); --- Modified the self-healing test method (see 5.11, 5.11 of the.2010 edition); --- Increased requirements for environmental testing (see 5.13.1); --- Revised the content of the voltage test after the constant damp heat test (see 5.13.2, 5.13.2 of the.2010 edition); ---Modified "visual inspection" to "general inspection" and increased weighing requirements (see 5.14.2,.2010 edition 5.14.2); --- Increased the durability test 5.15.1 "Overview", the subsequent sub-segment number is postponed (see 5.15); --- Removed the contents described in Table 6 (see 5.14 of the.2010 edition); --- Increased test conditions for capacitors with special requirements and no corresponding standards (see 5.14.3); --- Revised the durability test content (see 5.15, 5.15 of the.2010 edition); --- Revised the initial capacitance and loss tangent in the durability test (see 5.15.3,.2010 edition 5.15.2); --- Modified the peak current of 1000 charge and discharge (see 5.15.3, 5.15.3 of the.2010 edition); ---Modified the test procedure for the AC capacitor test voltage 1.25UN (see 5.16.2, 5.16 of the.2010 edition); --- Modified the destructive test, increased the performance relationship between the damage test and the system safety type, and the test of the DC capacitor test program Method, removing destructive test requirements (see Table 7 of 5.16.1); --- Increased the determination of the isolation metallization design and the special non-isolated metallization design capacitance (see 5.16.2); --- Modified the "maximum allowable voltage" to "overload" (see Chapter 6, Chapter 6 of the.2010 edition); --- Increased the requirements for marking in environmental protection (see 7.3); --- Increased test requirements for flame retardant properties (see 7.4); --- Added the nameplate, the capacitor with protection device can be marked (see 8.1); ---Modified the way in which measures may be taken during installation (see 9.3.2, version 9.3.2 of.2010); --- Modified the selection of creepage distance and clearance, refer to GB/T 32350.1 (see 9.8,.2010 edition) 9.8); --- Modified "the insulation voltage of the unit should be suitable for series arrangement" as "the insulation voltage of the unit should be considered in the series arrangement" (see 9.11, 9.11 of the.2010 edition); --- Added guidelines for unprotected capacitors (see 9.14); --- Removed Appendix A, and the other appendixes were adjusted in order (see Appendix A of the.2010 edition). This part adopts the redrafting method to modify the use of IEC 61881-1.2010 "railway rolling stock equipment power electronic capacitors Part 1. Paper/plastic film capacitors. This section has structural differences compared to IEC 61881-1.2010, an increase of 3.36, 3.37, 3.38, an increase of 5.2.1 overview, 5.15.1 Overview, 9.3.1 overview, subsequent clauses are postponed; 3.7, 3.8, 3.26.1, 3.29, 3.30.1, 3.30.2, 8.1 are deleted, and 8.1.1 is adjusted 8.1, 8.1.2 is 8.2. This section has technical differences compared to IEC 61881-1.2010, and the terms involved in these differences have been passed on the outside margins. The vertical single line (—) of the position is marked. The main technical differences and their reasons are as follows. --- Revised the scope and increased the specific content of the standard. According to GB/T 3984, change "40Hz~24000Hz" to “Operation at 50 kHz and below”, it is clear that power electronic capacitors other than rail transit specified in GB/T 17702 are not applicable; --- Deleted the description of the capacitors specified in Part 2 and Part 3 in this part of the scope, as the standard name is clear; ---About the normative reference documents, this part has made technical adjustments to adapt to China's technical conditions, adjustments The situation is reflected in Chapter 2, “Regulatory Citations”, and the specific adjustments are as follows. ● Replace IEC 62498-1 with GB/T 32347.1-2015 modified with international standards (see 4.1.1); ● Replace IEC 60721-3-5 with GB/T 4798.5-2007 modified with international standards (see 4.1.2); ● Replace IEC 60068-2-78 with GB/T 2423.3 equivalent to the international standard (see 5.13.2); ● Replace IEC 60068-2-14 with GB/T 2423.22-2012 equivalent to the international standard (see 5.13.1); ● Replace IEC 60068-2-20 with GB/T 2423.28 equivalent to the international standard (see 5.14.1); ● Replace IEC 60068-2-21 with GB/T 2423.60 equivalent to the international standard (see 5.14.1); ● Replace IEC 61373 with GB/T 21563 with international standards (see 5.14.3); ● Replace IEC 60269-1 (5.16.2, 5.16.3) with GB/T 13539.1 equivalent to the international standard; ● Replace IEC 60695-11-5 with GB/T 5169.5 equivalent to the international standard (see 7.4); ● Replace IEC 60695-2-11 with GB/T 5169.11-2017 equivalent to the international standard (see 7.4); ● Replace IEC 62497-1 (see 9.8) with GB/T 32350.1 modified to international standards. --- Added the equivalent series inductance of the 3.36 capacitor, 3.37 thermal balance, 3.38 thermal time constant, easy to understand the standard, delete The term removed 3.7 metal foil capacitor (non-self-healing), 3.8 self-healing metallized dielectric capacitor, 3.26.1 continuous work Cycle, 3.29 case temperature rise, 3.30.1 forced cooling capacitor outlet liquid temperature, 3.30.2 forced cooling capacitor The temperature of the mouth liquid does not appear in the text; --- Revised the altitude requirements in 4.1.1, 4.2, 9.3.2, from 1400m to 2500m, to adapt to China's national conditions; --- Revised the "climate ambient temperature" in 4.1.2 to "ambient temperature" to meet the description of GB/T 4798.5-2007; ---Modified the ambient temperature condition in 4.1.2 from 5K2, the range is changed from -25°C to 40°C to 5K3, and the range is from -40°C~ 40 ° C, in line with the actual situation in China; --- Increased the partial discharge measurement requirements in 5.2.3, Table 2, increased the test requirements; --- Removed the 5.2.3 medium-sized inspection of the test article requirements "by the manufacturer's choice" to adapt to China's national conditions; --- Revised the allowable deviation range of "5.3.2 capacitance" "±10%" to "±5%" to improve the control requirements; --- Increased the capacitance of 5.5.3 and the measurement of tan according to the provisions of 5.3, the test is more specific; --- Revised the test voltage of 5.6.1 terminal and outer casing to improve the test assessment requirements; --- Modified the 5.9 surge discharge test content, delete "for large units, may take more than 10min", not easy to define; --- Revised the final test content after the 5.10 thermal stability test, increased the judgment basis, and facilitated the performance evaluation of the capacitor; --- Revised the 5.13 environmental test requirements, in line with China's actual needs; --- Deleted the contents described in Table 6, which does not meet the actual use situation in China; --- Revised 5.14.2 "Appearance Inspection" as "General Inspection" and increased weighing requirements to meet the actual situation in China; --- Amend the note in 5.16.1 to the body column because it contains the requirements; --- Amend the note in 7.1 as a clause because it contains requirements; ---Modified part of the 8.1 nameplate, the original "unprotected capacitor" as "unprotected" logo, modified to "protected "Set the capacitor" to "protect" the logo to meet the actual situation in China; --- Revised the way in which the measures may be taken during installation in 9.3.2, refining the principle of selection of capacitors. This section also made the following editorial changes. --- Modified 3.32 "Resr" and added "ESR" expression. --- Modified the error in IEC 61881-1.2010. ● The document IEC originally quoted in 4.1.1 is “IEC 62491” and is incorrect. It should be “IEC 62498-1”. This part is amended to "GB/T 32347.1-2015 Environmental conditions for rail transit equipment - Part 1. Equipment for rolling stock (IEC 62498-1. 2010, MOD)"; ● Revised the voltage test content after the constant damp heat test, the original "after the constant test is completed, the capacitor is in accordance with 5.5.1 Perform voltage test between terminals and voltage test of terminal and case according to 5.6.1" After completion, the capacitor is tested for voltage between the terminals in accordance with 5.5.3, and the power between the terminals and the case is performed according to 5.6.2. Pressure test"; ● The reference clause “5.17.5” in 5.16.2 shall be “5.17.4”; ● The reference clause in 5.15.5 “described in Chapter 5” is incorrect and should be “as described in 5.15.3”; ● The clause “Chapter 5” cited in 5.15.6 is incorrect and should be “measured according to 5.15.3 and 5.15.5”; ● In 5.16.1, “the DC-AC cycle or AC-DC cycle test is determined by the manufacturer’s choice” is incorrect and should be “The manufacturer decides to apply a DC-AC cycle or DC-DC cycle test”; ● In 5.16.3, “If the capacitor is protected by an overpressure detector, it is replaced by a circuit breaker controlled by a pressure detector. The fuse in Figure 2 is incorrect and should be "fuse in Figure 1." --- Revised the introduction of the dielectric loss factor. The original text is changed from tand to tan δd. --- Revised the presentation order of Appendix B. --- Revised references. Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This part is proposed by the National Railway Administration. This part is under the jurisdiction of the National Traction Electrical Equipment and Systems Standardization Technical Committee (SAC/TC278). This section is responsible for drafting units. Ningbo Jiangbei Jiufang Herong Electric Co., Ltd., CRRC Zhuzhou Electric Locomotive Research Institute Co., Ltd. Participated in the drafting of this section. Xiamen Farah Electronics Co., Ltd., Anhui Tongfeng Electronics Co., Ltd. The main drafters of this section. Tong Kefeng, Li Jianming, Wang Jian, Huang Yunqi, Huang Shunda. The previous versions of the standards replaced by this section. ---GB/T 25121-2010. Rail transit rolling stock equipment power electronic capacitor Part 1. Paper/plastic film capacitors

1 Scope

This part of GB/T 25121 specifies the use conditions, quality requirements and inspection, overload, safety requirements and standards of power electronic capacitors. Guidelines for the identification, installation and application. This section applies to power electronic capacitors used in rail transit vehicles. The capacitors covered in this section are rated up to 10000V. The operating frequency of such a capacitor system is usually less than 15 kHz, and the pulse frequency can reach 5 to 10 times the operating frequency. Capacitors are divided into AC capacitors and DC capacitors. The capacitor is mounted as a component in the housing. Note. This section applies to a wide range of capacitor technologies, including overvoltage protection, DC and AC filters, switching circuits, DC energy storage, auxiliary converters, etc. Capacitors used in many applications. This section does not apply to the following capacitors. --- Capacitors for induction heating devices operating at frequencies below 50 kHz (see GB/T 3984.1 and GB/T 3984.2); --- AC motors and capacitors for similar applications (see GB/T 3667.1 and GB/T 3667.2); --- Capacitors used in circuits that suppress one or more harmonics in an electrical power supply network; --- Small AC capacitors for fluorescent lamps and discharge lamps (see GB/T 18489 and GB/T 18504); --- Capacitors for suppressing electromagnetic interference (see GB/T 6346.14); ---Parallel capacitors for AC power systems with a nominal voltage above 1000V (see GB/T 11024.1, GB/T 11024.2, GB/T 11024.3 and GB/T 11024.4); --- Self-healing parallel power capacitors for AC power systems with nominal voltages of 1000V and below (see GB/T 12747.1 and GB/T 12747.2); --- Non-self-healing parallel power capacitors for AC power systems with nominal voltages of 1000V and below (see GB/T 17886.1, GB/T 17886.2 and GB/T 17886.3); ---Series capacitors for power systems (see GB/T 6115.1, GB/T 6115.2, GB/T 6115.3 and GB/T 6115.4); ---Coupling capacitors and capacitor dividers (see GB/T 19749.1); --- for the storage of energy/high current discharge, such as capacitors in photocopiers and laser machines; ---Microwave capacitors (see GB/T 18939.1); --- Power electronic capacitors other than rail transit (see GB/T 17702).

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this article. Pieces. For undated references, the latest edition (including all amendments) applies to this document. GB/T 2423.3 Environmental Test Part 2. Test Method Test Cab. Constant Damp Heat Test (GB/T 2423.3-2016, IEC 60068-2-78.2012, IDT) GB/T 2423.22-2012 Environmental testing - Part 2. Test methods Test N. Temperature change (IEC 60068-2-14. ......

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