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1、BRITISH STANDARD BS IEC 1000-3-5:1994 Implementation of IEC 1000-3-5:1994 Electromagnetic compatibility (EMC) Part 3: Limits Section 5: Limitation of voltage fluctuations and flicker in low-voltage power supply systems for equipment with rated current greater than 16 A Licensed Copy: sheffieldun she
2、ffieldun, na, Sun Nov 26 12:00:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 1000-3-5:1994 This British Standard, having been prepared under the direction of the Electrotechnical Sector Board, was published under the authority of the Standards Board and comes into effect on 15 December 1995 B
3、SI 10-1999 The following BSI references relate to the work on this standard: Committee reference GEL/110 Draft for comment 90/28293 DC ISBN 0 580 24860 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee GEL/110, Electromag
4、netic compatibility, upon which the following bodies were represented: Association of Control Manufacturers (TACMA) (BEAMA Ltd.) Association of Manufacturers of Domestic Electrical Appliances Automated Material Handling Systems Association BEAMA Interactive and Mains Systems Association (BIMSA) BEAM
5、A Ltd. British Lighting Association for the Preparation of Standards (Britlaps) British Radio and Electronic Equipment Manufacturers Association British Telecommunications plc Department of Health Department of Transport EEA (the Association of Electronics, Telecommunications and Business Equipment
6、Industries) ERA Technology Ltd. Electrical Installation Equipment Manufacturers Association (BEAMA Ltd.) Electricity Supply Industry in United Kingdom Electro Medical Trade Association Limited Electronic Components Industry Federation Engineering Equipment and Materials Users Association GAMBICA (BE
7、AMA Ltd.) Health and Safety Executive Induction and Dielectric Heating Manufacturers Association Institution of Electrical Engineers Lighting Industry Federation Ltd. Ministry of Defence National Air Traffic Services National Telecommunications Ltd. National Transcommunications Ltd. Radiocommunicati
8、ons Agency Rotating Electrical Machines Association (BEAMA Ltd.) Society of British Gas Industries Society of Motor Manufacturers and Traders Limited Sound and Communication Industries Federation Transmission and Distribution Association (BEAMA Ltd.) United Kingdom Atomic Energy Authority The follow
9、ing body was also represented in the drafting of the standard, through subcommittees and panels: British Steel plc Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:00:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 1000-3-5:1994
10、BSI 10-1999i Contents Page Introduction1 1Scope1 2Normative references1 3Definitions1 4Equipment assessment1 4.1General1 4.2Information from the consumer2 4.3Information from the electricity supplier2 4.4Information from the manufacturer2 4.5Measurement procedure for the type test for equipment with
11、 a rated input current up to 75 A2 4.5.1 Test impedance Z*2 4.5.2 Test of equipment against Z*2 4.5.3 Evaluation against Zref2 4.6Evaluation and declaration by the manufacturer of equipment with a rated input current up to 75 A2 4.6.1 Check of the measured values against the limits contained in IEC
12、1000-3-32 4.6.2 Calculation of the maximum permissible system impedance3 4.7Evaluation of equipment with a rated input current exceeding 75 A3 Annex A (informative) Recommended questionnaire for the consumer4 Annex B (informative) Recommended questionnaire for the electricity supplier5 Annex C (info
13、rmative) Explanations5 C.1Explanation of 4.5.15 C.2Explanation of 4.6.25 C.3Explanation of 4.76 Annex D (informative) Diagrammatic representation of procedures to be followed in evaluating voltage fluctuations and flicker disturbances caused by equipment connected to the low-voltage public supply ne
14、twork7 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:00:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 1000-3-5:1994 ii BSI 10-1999 National foreword This British Standard reproduces the English text of IEC 1000-3-5:1994 and implements it as the UK national standard. This British S
15、tandard is published under the direction of the Electrotechnical Sector Board whose Technical Committee GEL/110 has the responsibility to: aid enquirers to understand the text; present to the responsible international committee any enquiries on interpretation, or proposals for change, and keep UK in
16、terests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Services, BSI, 389 Chiswick High Road, London W4 4AL. A British Standard does not purport to i
17、nclude all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pa
18、ges i and ii, pages 1 to 7 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:00:16 GMT+00:00 2006, Uncontro
19、lled Copy, (c) BSI BS IEC 1000-3-5:1994 BSI 10-19991 Introduction IEC 1000 is published in separate parts according to the following structure: Part 1: General General considerations (introduction, fundamental principles) Definitions, terminology Part 2: Environment Description of the environment Cl
20、assification of the environment Compatibility levels Part 3: Limits Emission limits Immunity limits (in so far as they do not fall under responsibility of product committees) Part 4: Testing and measurement techniques Measurement techniques Testing techniques Part 5: Installation and mitigation guid
21、elines Installation guidelines Mitigation methods and devices Part 9: Miscellaneous Each part is further subdivided into sections which are to be published either as International Standards or as Technical Reports. These standards and reports will be published in chronological order and numbered acc
22、ordingly. This section is a technical report. 1 Scope This section of IEC 1000-3 is concerned with the emission of disturbances due to voltage fluctuations and flicker. The recommendations in this Technical Report are applicable to electrical and electronic equipment intended to be connected to a pu
23、blic low-voltage a.c. distribution system, where the equipment has a rated input current exceeding 16 A per phase, or has a lower rated current, but requires the special consent of the supply authority. The recommendations that specify the information required to enable a supply authority, manufactu
24、rer, or consumer to assess equipment and appropriate questionnaires are included as Annex A and Annex B. Guidance is also given on emission values of voltage fluctuations produced by equipment which has been type tested to the specified conditions given in IEC 1000-3-3. NOTE 1The limits recommended
25、in this report are mainly based on the subjective severity of the flicker of the light output from 230 V/60 W coiled-coil filament lamps as a result of fluctuation of the supply voltage. For systems with nominal voltages less than 220 V, line-to-neutral, limits, and reference circuit values have not
26、 yet been considered. The authorization to connect equipment to the supply depends on the levels of disturbance caused by the equipment and the load flow conditions in the network. NOTE 2For equipment requiring authorization, only general recommendations for the assessment of disturbances can be giv
27、en. There is no guarantee that the connection of equipment complying with the recommendations in clause 3 will be allowed in all cases, as system loading must not exceed plant ratings (transformers, cables, etc.). The methods of assessment may be applied also to private consumer installations. 2 Nor
28、mative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this section of IEC 1000-3. At the time of publication, the editions indicated were valid. All normative documents are subject to revision, and parties to agreements
29、 based upon this section of IEC 1000-3 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. Members of the IEC and the ISO maintain registers of currently valid International Standards. IEC 50(161):1990, International Electrot
30、echnical Vocabulary (IEV) Chapter 161: Electromagnetic compatibility. IEC 555-2:1982, Disturbances in supply systems caused by household appliances and similar electrical equipment Part 2: Harmonics. IEC 1000-3-3:1994, Electromagnetic compatibility Part 3: Limits Section 3: Limitation of voltage flu
31、ctuations and flicker in low-voltage power supply systems for equipment with rated current k 16 A. 3 Definitions Definitions are given in IEC 555-2, IEC 1000-3-3 and IEC 50(161). 4 Equipment assessment 4.1 General Methods of flicker assessment for different types of voltage fluctuations are describe
32、d in IEC 1000-3-3. It is recommended that the supply quality parameters are measured before and after the connection of a new load which is critical in any respect. The assessment method and data used should be verified. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:00:16 GMT+00:00 2006,
33、 Uncontrolled Copy, (c) BSI BS IEC 1000-3-5:1994 2 BSI 10-1999 The equipment shall comply with the limits for all relevant phase-to-neutral voltages. 4.2 Information from the consumer When a consumer enquires about connection of a major load to a low-voltage public supply network he shall, on reques
34、t, provide information to enable assessment of the possible disturbances caused by the load. This may be done by completing the questionnaire contained in Annex A. 4.3 Information from the electricity supplier The electricity supplier may, on request and if appropriate, complete the questionnaire co
35、ntained in Annex B. 4.4 Information from the manufacturer If the equipment complies with the requirements given in IEC 1000-3-3, this should be declared, and no further action is necessary. If the equipment has an input current up to and including 75 A and does not comply with IEC 1000-3-3, the manu
36、facturer shall calculate and declare the maximum permissible system impedance in accordance with 4.6.2. This declaration is given in order to facilitate the decision of the electricity supplier as to whether or not the equipment may be connected to the supply system at a particular location. In orde
37、r to proceed, the tests of 4.5 are carried out. If the equipment has a rated input current exceeding 75 A, the procedure in 4.7 shall be followed. NOTEA diagramatic representation of the procedure is given in Annex D. 4.5 Measurement procedure for the type test for equipment with a rated input curre
38、nt up to 75 A In order to evaluate the maximum permissible system impedance for type test, some auxiliary quantities are necessary. Their meaning is presented in Table 1. Table 1 Meaning of the suffixes in different situations 4.5.1 Test impedance Z* The test impedance Z* is equal to Zref for equipm
39、ent with a rated input current less than or equal to 16 A. It is lower than Zref for equipment with a rated input current greater than 16 A. To find the optimal test impedance, two conditions shall be met. firstly, the voltage drop %U caused by the equipment should be 3 % to 5 %; secondly, the ratio
40、 of ohmic and inductive components of Z* should be R*/X* = 0,5 to 0,75 (similar to the reference impedance). NOTEThe 3 % to 5 % condition ensures that the relative current changes of the equipment in the real network situation are nearly the same as those of the test. 4.5.2 Test of equipment against
41、 Z* The test shall be made with the test circuit described in IEC 1000-3-3, except that the impedance Zref is replaced with Z*. Four values dc*, dmax*, Pst*, Plt* shall be measured. The meaning of dc, dmax, Pst, Plt is given in IEC 1000-3-3. The asterisk indicates that the four values refer to a mea
42、surement with Z*, not Zref. 4.5.3 Evaluation against Zref If Z* is not equal to Zref, the measured values shall be recalculated by the following formula: The values dc, dmax, Pst, Plt are similar to those which would be obtained by a measurement with the reference impedance. 4.6 Evaluation and decla
43、ration by the manufacturer of equipment with a rated input current up to 75 A 4.6.1 Check of the measured values against the limits contained in IEC 1000-3-3 If all values calculated according to 4.5.3 are less than, or equal to, the limits given in IEC 1000-3-3, the manufacturer declares that the p
44、roduct meets “the voltage fluctuation requirements of IEC 1000-3-3”. NOTEThe following limits are given in IEC 1000-3-3, clause 5: the value of Pst shall not be greater than 1,0; the value of Plt shall not be greater than 0,65; the relative steady state voltage change, dc, shall not exceed 3 %; the
45、maximum relative voltage change, dmax, shall not exceed 4 %. If voltage changes are caused by manual switching, or occur less frequently than once per hour, the Pst and Plt requirements are not applicable, and the values of dc and dmax are multiplied by a factor of 1,33. SuffixMeaningSituation syssy
46、stemZsys is the impedance of the system to which the equipment may be connected refreferenceZref is the reference impedance *measurement or calculation Z* is the test circuit impedance at which the emission test is performed dc= dc*Zref/Z* dmax= dmax*Zref/Z* Pst= Pst*Zref/Z* Plt= Plt*Zref/Z* License
47、d Copy: sheffieldun sheffieldun, na, Sun Nov 26 12:00:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS IEC 1000-3-5:1994 BSI 10-19993 4.6.2 Calculation of the maximum permissible system impedance The following evaluation is only necessary for criteria in which the limits of IEC 1000-3-3 are exceeded
48、. In that case, higher emission values are permissible only if the equipment is connected to a supply with a lower impedance than the reference impedance. To calculate that lower system impedance, use the values of dc, dmax, Pst and Plt as calculated in 4.5.3. For manual switching, and where switchi
49、ng occurs less frequently than once per hour: |Zsys| = |Zref|1,33 4 %/dmax |Zsys| = |Zref|1,33 3 %/dc NOTESee the note to 4.6.1. In all other cases: |Zsys| = |Zref| 4 %/dmax |Zsys| = |Zref| 3 %/dc |Zsys| = |Zref| (1/Pst)3/2 |Zsys| = |Zref| (0,65/Plt)3/2 The minimum of all calculated values |Zsys| is the maximum permissible system impedance. The manufacturer should declare this maximum permissible system impedance. 4.7 Evaluation of equipment with a rated input current exceeding 75 A For equipment with a rated input current excee