This guidance technical document involves the emission of disturbances such as voltage fluctuations and flickers. GB/Z 17625.3-2000 Electromagnetic compatibility limits Limits on voltage fluctuations and flickers generated by equipment with rated current greater than 16A in low-voltage power supply systems GB/Z17625.3-2000 Standard download decompression password: www.bzxz.net

GB/Z 17625.3-—2000
This guiding technical document is equivalent to the international standard IEC61000-3-5:1994 (Edition 1) "Electromagnetic compatibility Part 3: Limits Part 5: Limits of voltage fluctuations and flickers caused by equipment with rated current greater than 16A in low-voltage power supply systems". This guiding technical document recommends the limitation method of voltage fluctuations and flickers caused by equipment with rated current greater than 16A or rated current less than 16A but requiring special access to the power grid by the power supply department in the low-voltage power supply system. This guiding technical document is one of the national standards of the "Electromagnetic Compatibility Limits" series... This series of standards currently includes the following Standard: GB17625.1-1998 Limit values ​​of harmonic current emitted by low-voltage electrical and electronic equipment (input current per phase of equipment ≤16A) GB17625.2-1999 Electromagnetic compatibility limit values ​​Limit values ​​of voltage fluctuations and flicker generated in low-voltage power supply systems by equipment with rated current not exceeding 16A
GB/Z.17625.3---2000 Electromagnetic compatibility limit values ​​Limit values ​​of voltage fluctuations and flicker generated in low-voltage power supply systems by equipment with rated current greater than 16A
GB/Z17625.4-2000 Electromagnetic compatibility limit values ​​Evaluation of emission limits of distorted loads in medium and high voltage power systems GB/Z 17625. 5--2000
Evaluation of emission limits of fluctuating loads in medium and high voltage power systems+++
This guiding technical document is for reference only. Suggestions and comments on this guidance technical document shall be reported to the administrative department of standardization under the State Council
Appendix A, Appendix B, Appendix C and Appendix D of this guidance technical document are indicative appendices. This guidance technical document is proposed by the State Power Corporation. This guidance technical document is under the jurisdiction of the National Electromagnetic Compatibility Standardization Joint Working Group. The responsible drafting unit of this guidance technical document: Wuhan High Voltage Research Institute of the State Power Corporation. The main drafters of this guidance technical document: Wan Baoquan, Nie Dingzhen, Lang Weichuan, Wu Xiong, Jiang Hong, Gong Zeng. 133
GB/Z17625.3-2000
IEC ForewordwwW.bzxz.Net
1) The International Electrotechnical Commission (IEC) is a worldwide standardization organization composed of the National Electrotechnical Commissions (IEC National Committees) of all participating countries. Its purpose is to promote international consensus on all issues related to standardization in the field of electrical and electronic technology. To this end, in addition to carrying out other activities, it also publishes international standards, which are commissioned to be formulated by technical committees. Any IEC National Committee interested in the formulation project may participate. International organizations, governmental and non-governmental organizations in liaison with the IEC may also participate in this work. The IEC works closely with the International Organization for Standardization (ISO) under conditions determined by negotiation between the two organizations. 2) Since each technical committee has representatives from all countries interested in the relevant development project, the formal decisions or agreements made by the IEC on the relevant technical content express international consensus as much as possible. 3) The resulting documents may be published in the form of standards, technical reports or guidelines, and are recommended for international use and accepted by the national committees in this sense.
4) In order to promote international consistency, IEC national committees should convert IEC international standards into their national and regional standards as much as possible, and any differences between the corresponding national or regional standards and IEC international standards should be clearly stated in the standards. The main task of the IEC technical committee is to develop international standards. In special circumstances, the technical committee may publish one of the following types of technical reports.
· Type 1, when publication as an international standard is not possible despite repeated efforts; · Type 2, when the subject is still in the technical development stage or cannot be agreed upon as an international standard at a later date for any other reason;
· Type 3, when the technical committee collects various information, such as "scientific developments", in the routine process of publishing international standards. Type 1 and Type 2 technical reports are reviewed within three years from the time of publication to decide whether they can become international standards. Type 3 technical reports do not need to be reviewed until the information they provide is considered no longer valid or useful. IEC61000-3-5 is a Type 2 technical report, which was prepared by the following committee: IEC Technical Committee 77 (Electromagnetic Compatibility) Subcommittee 77B (High Frequency Phenomena). This technical report is Part 3, Subpart 5 of IEC61000 and has the status of a basic EMC publication in accordance with IEC Guide 107.
This standard text is based on the documents in the table below: Committee Draft
77A(SEC)72
Voting Report
77A(SEC)80
Full information on the voting for this technical report can be found in the voting report in the table above. Appendices A, B, C and D are for reference only. 331
GB/Z17625.3—2000
IEC Introduction
This standard is part of the IEC61000 series of standards, which consists of: Part 1: General
General considerations (overview, basic principles)
Definitions, terms
Part 2: Environment
Description of environment
Classification of environment
Compatibility level
Part 3: Limits
Emission limits
Immunity limits (when not within the scope of responsibility of the product committee) Part 4: Test and measurement techniques
Measurement techniques
Test techniques
Part 5: Installation and mitigation guidelines
Installation guidelines
Mitigation methods and devices
Part 6: Generic standards
: Part 9: Others
Each part can be divided into several subparts, which are published as international standards or technical reports. 335
National Standardization Guidance Technical Document of the People's Republic of China Electromagnetic compatibility Limits
Limitation of voltage fluctuations and flicker in low-voltage power supply systems for equipment with rated current greater than 16 A
1 Scope
This guidance technical document deals with the emission of disturbances such as voltage fluctuations and flicker. GB/Z17625.3-2000
idtIEC61000-3-5:1994
This guidance technical document applies to equipment with a rated input current of more than 16 A per phase to be connected to a public low-voltage AC power distribution system, or equipment with a lower rated current but requiring special permission from the power supply company to be connected. This guidance technical document specifies the data necessary to enable the power supply company, manufacturer or user to evaluate the equipment, and is included in a set of appropriate questionnaires such as Appendix A and Appendix B. Guidance is also given for the emission values ​​of voltage fluctuations generated by equipment that has been type tested under the conditions specified in GB17625.2 (IEC61000-3-3).
Note 1: The limits recommended in this guidance technical document are mainly based on the severity of the flickering of the light emitted by a 230V/60W incandescent lamp due to supply voltage fluctuations. The limits and reference circuit parameters for systems with a rated voltage (phase-neutral) less than 220V have not been considered. Whether the equipment can be connected to the power supply system depends on the level of interference generated by the equipment and the flow of loads in the network. Note 2: For equipment that requires special permission to be connected, only some general suggestions for evaluating interference can be given. It cannot be guaranteed that equipment that complies with the first recommendation will be allowed to be connected in any case, because the load of the system should not exceed the rated value of the equipment (transformer, cable, etc.). The evaluation method is also applicable to user-specific equipment. 2 Reference standards
The provisions contained in the following standards constitute the provisions of this guidance technical document through reference in this guidance technical document. The versions shown are valid when this guidance technical document is published. All standards will be revised. All parties using this guidance technical document should explore the possibility of using the latest versions of the following standards. GB/T4365-1995 Electromagnetic compatibility terminology (idtIEC60050(161):1990) GB17625.1--1998 Limits of harmonic currents emitted by low-voltage electrical and electronic equipment (equipment input current per phase ≥.16A）(eqvIEC61000-3-2:1995)
GB17625.2--1999 Electromagnetic compatibility limit values ​​Limitation of voltage fluctuations and flicker in low voltage power supply systems for equipment with rated current not exceeding 16A (idtIEC61000-3-3:1994) Approved by the State Administration of Quality and Technical Supervision on April 3, 2000 336
Implementation on December 1, 2000
3 Definitions
GB/Z17625.3 ---2000
The relevant definitions are given in GB17625.1, GB17625.2 and GB/T4365. 4 Equipment Assessment
4.1 General
Methods for assessing flicker caused by different types of voltage changes are given in GB17625.2. For a new load required to be connected to the system, it is recommended that the power quality parameters should be measured before and after the load is connected. This is important in any case. The assessment methods and data used should be verified. The equipment should comply with all provisions regarding phase voltage limits. 4.2 Information to be provided by the user
When the user proposes the relevant requirements to connect most of the loads to the public low-voltage power supply network, the user should provide information on request to enable the assessment of the disturbance that may be caused by these loads. This requires filling in the questionnaire in Appendix A. 4.3 Information to be provided by the power supply company
On request and where appropriate, the power supply company shall fill in the questionnaire in Appendix B. 4.4 Information to be provided by the manufacturer
If the input current of the equipment is not greater than 75A and does not meet the requirements of GB17625.2, the manufacturer should calculate and publish the maximum allowable system impedance in accordance with 4.6.2. This maximum system impedance is given to facilitate the power supply company to decide whether the equipment can be connected to the system at a specific location. For this purpose, the test should be carried out in accordance with 4.5. If the rated input current of the equipment is greater than 75A, it should be estimated according to the procedure of 4.7. NOTE: Appendix D gives a schematic diagram of this procedure. 4.5 Measurement procedure for type test of equipment with rated input current not greater than 75A To evaluate the maximum allowable system impedance for type test, some auxiliary quantities are required. The meanings of these auxiliary quantities are listed in Table 1. The meanings of the subscripts in Table 1 in different cases
4.5.1 Test circuit impedance Z
System (system)
Reference (reference)
Measurement or calculation
Z is the impedance of the system to which the equipment may be connected Zr is the reference impedance
7* is the impedance of the test circuit
For equipment with rated input current not greater than 16A, the test circuit impedance Z* is Zret; for equipment with rated input current greater than 16A: the test circuit impedance Z*
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