bsen61000-3-11-2001电磁兼容性极限值公共低压供电系统电压变化、电压波动和闪烁极限值额定电流为75a有规定连接条件的设备

bsen61000-3-11-2001电磁兼容性极限值公共低压供电系统电压变化、电压波动和闪烁极限值额定电流为75a有规定连接条件的设备内容摘要：

s specified in this part of IEC 61000. Equipment which meets the requirements of IEC 6100033 is not subject to conditional connection and therefore it is not subject to this part of IEC 61000. The limits in this part relate to the voltage changes experienced by consumers connected at the interface between the public supply lowvoltage work and the equipment user’s installation. Therefore, it cannot be guaranteed that the user of equipment pliant with this standard will not experience supply disturbance within his own installation, as the impedance at the point of connection of the equipment to the supply within the installation may have an impedance greater than the test impedance. Page 5 EN 61000−3−11:2020 169。 BSI 012020 ELECTROMAGNETIC COMPATIBILITY (EMC) – Part 311: Limits – Limitation of voltage changes, voltage fluctuations and flicker in public lowvoltage supply systems – Equipment with rated current 75 A and subject to conditional connection 1 Scope and object This part of IEC 61000 is concerned with the emission of voltage changes, voltage fluctuations and flicker produced by equipment and impressed on the public lowvoltage supply system. 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 IEC 6100033, Electromagic patibility (EMC) – Part 3: Limits – Section 3: Limitation of voltage fluctuations and flicker in lowvoltage supply systems for equipment with rated current 16 A 3 Definitions For the purposes of this part of IEC 61000 the terms and definitions given in IEC 60050(161) and IEC 6100033, as well as the following apply: reference impedance, Zref the conventional impedance specified in IEC 6100033 with a value in accordance with IEC 60725 which is used in the calculation and measurement of relative voltage change d, Pst and Plt values NOTE The resistive and reactive ponents of Zref are given in figure 1. interface point interface between a public supply work and a user’s installation conditional connection connection of equipment which requires the user’s supply at the interface point to have an impedance lower than the reference impedance Zref in order that the equipment emissions ply with the limits in this standard NOTE Meeting the voltage change limits is not the only condition for connection。 emission limits for other phenomena such as harmonics, may also have to be satisfied. service current capacity the current per phase which can be taken continuously by the user at the interface point without exceeding the plant ratings used by the supply authority in the design of its system NOTE In practice the service current capacity is the rating of the main service fuse or overcurrent protection setting of the circuit breaker at the interface point. In cases where supply authorities declare supply capacities in voltamperes, the current per phase may be deduced for single phase supplies by dividing the voltamperes by the declared phase voltage, and for threephase supplies by dividing it by 3 times the declared line voltage. 4 Requirements If equipment plies with the requirements of IEC 6100033 and therefore is not subject to conditional connection, it may be declared so by the manufacturer in documentation made available to users before purchase. Equipment which does not meet the limits of IEC 6100033, when tested or evaluated with reference impedance Zref, is subject to。