【正文】 m. It specifies the limits of voltage changes produced by equipment tested under specified conditions. This part of IEC 61000 is primarily applicable to electrical and electronic equipment having a rated input current from 16 A up to and including 75 A, which is intended to be connected to public lowvoltage distribution systems having nominal system voltages of between 220 V and 250 V, linetoneutral at 50 Hz, and which is subject to conditional connection. This part of IEC 61000 is also applicable to equipment within the scope of IEC 6100033 that does not meet the limits when tested or evaluated with reference impedance Zref and is therefore subject to conditional connection. Equipment which meets the requirements of IEC 6100033, is excluded from this part of IEC 61000. Equipment tests made in accordance with this part of IEC 61000 are type tests. NOTE The flicker limits specified in this part, being the same as those in IEC 6100033, are based on the subjective severity of the flicker imposed on the light from 230 V/60 W coiledcoil filament lamps when subjected to fluctuations of the supply voltage. For systems with nominal voltages less than 220 V, linetoneutral and/or frequency of 60 Hz, the limits and reference circuit values are under consideration. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of IEC 61000. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However parties to agreements based on this part of IEC 61000 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. IEC 60050(161), International Electrotechnical Vocabulary (IEV) – Chapter 161: Electro magic Compatibility IEC 60725, Considerations on reference impedances for use in determining the disturbance characteristics of household appliances and similar electrical equipment Page 6 EN 61000?3?11:2020 169。 BSI 012020 CONTENTS Page INTRODUCTION .................................................................................................................... 4 Clause 1 Scope and object ............................................................................................................. 5 2 Normative references ....................................................................................................... 5 3 Definitions.................................................................................................................. ...... 6 4 Requirements .................................................................................................................. 6 5 Limits ............................................................................................................................... 7 6 Test, measurement and evaluation procedures ................................................................. 8 Test and measurement procedure ........................................................................... 8 Test impedance Ztest ................................................................................... 8 Test of equipment against Ztest ................................................................... 9 Evaluation against Zref ................................................................................ 9 Evaluation and declaration by the manufacturer of the maximum permissible system impedance .................................................................................................. 9 Comparison of calculated and measured emission values with clause 5 limits to enable a declaration of pliance with IEC 6100033 .................. 9 Calculation of the maximum permissible system impedance .......................10 Evaluation and declaration by the manufacturer of the minimum permissible service current capacity .........................................................................................10 Annex A (informative) Explanation of flicker exponents .........................................................12 Annex B (informative) Flow chart showing the evaluation and test procedures leading to the connection of equipment ..............................................................................................14 Annex ZA (normative) Normative references to international publications with their corresponding European publications ....................................................................................16 Figure 1 – Reference work for single and threephase supplies derived from a threephase, fourwire supply. .............................................................................................15 Page 4 EN 61000?3?11:2020 169。(1(/(amp。 BBBBBBBBBB (QGRUVHPHQW QRWLFH 7KH WH[W RI WKH ,QWHUQDWLRQDO 6WDQGDUG ,(amp。 DV (1 RQ 7K H IROO RZLQJ GDWHV ZHUH IL[HG ? 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