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GB/T 17625.8-2015: Electromagnetic compatibility -- Limits -- Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current 16 A and 75 A per phase
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GB/T 17625.8-2015: Electromagnetic compatibility -- Limits -- Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current 16 A and 75 A per phase

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Electromagnetic compatibility - Limits - Limits for harmonic currents produced by equipment connected to public low-voltage systems with input current > 16 A and ≤75 A per phase ICS 33.100.10 L06 National Standards of People's Republic of China Electromagnetic compatibility limits input current is greater than each 16A 75A or less connected to the public low System equipment generates harmonic current limits inputcurrent > 16Aand≤75Aperphase (IEC 61000-3-12.2004, Electromagneticcompatibility (EMC) - Part 3-12.Limits-Limitsforharmoniccurrentsproducedbyequipment > 16Aand≤75Aperphase, IDT) Issued on. 2016-04-01 2015-09-11 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Table of Contents

Introduction Ⅲ 1 Scope 1 2 Normative references 1 3 Terms and definitions 2 4 Measurement Condition 5 4.1 fundamental reference current 5 Harmonic current measuring 4.2 5 4.3 equipment consists of several components composed of 7 5 equipment requirements and limits 7 7 5.1 Control Method 5.2 emission limits 7 6 product documentation 9 7 10 test and simulation conditions 7.1 Overview 10 7.2 Direct measurement requirements 10 7.3 simulation requirements 11 7.4 Test and simulation General Conditions 11 Devices Appendix A (informative) This section does not comply with the limits and requirements 12 Annex B (informative) Information about PWHD 13 Annex C (normative) harmonic current limits Notes 14 Annex D (normative) approximate interpolation formula 15 References 17

Foreword

GB 17625 "EMC limits" currently includes the following components. GB 17625.1-2012 Electromagnetic compatibility - Limits for harmonic current emissions (equipment input current ≤16A) GB 17625.2-2007 Electromagnetic compatibility limits of the rated current per phase ≤16A and unconditional access to public low-voltage equipment Limit voltage generated in the power supply system, voltage fluctuations and flicker GB /Z17625.3-2000 electromagnetic compatibility limits rated current greater than 16A for equipment in low-voltage power supply system Limiting the voltage fluctuations and flicker GB /Z17625.4-2000 Electromagnetic compatibility Limits high voltage power system to assess load emission limits for distorting GB /Z17625.5-2000 Electromagnetic compatibility Limits high voltage power system to assess load fluctuation of emission limits GB /Z17625.6-2003 electromagnetic compatibility limits rated current greater than 16A for equipment in low-voltage power supply system Harmonic current limitation Equipment GB/T 17625.7-2013 Electromagnetic compatibility limits of the rated current ≤75A and conditional access in public low-voltage supply Limit voltage electricity generated in the system, voltage fluctuations and flicker Pressure system equipment with harmonic current limits This section GB 17625 "Electromagnetic Compatibility Limits" in Section 8. This section drafted in accordance with GB/T 1.1-2009 given rules. This section uses the translation method identical with IEC 61000-3-12.2004 "Electromagnetic compatibility (EMC) - Part 3-12.Limits of each phase output The current is greater than 16A 75A or less connected to the public low-voltage device system harmonics generated by current limit. " Consistency correspondence between this part of international documents and normative references of our files are as follows. --- GB/T 156-2007 standard voltage (IEC 60038.2002, MOD) --- GB/T 4365-2003 Electrotechnical terminology Electromagnetic compatibility [IEC 60050 (161).1990, IDT] --- GB/T 18039.3-2003 electromagnetic compatibility environment utility voltage power supply system frequency conducted disturbances and signaling and Tolerance level (IEC 61000-2-2.1990, IDT) --- GB/T 18039.4-2003 electromagnetic compatibility environment facility frequency conducted disturbances compatibility level (IEC 61000-2-4. 1994, IDT) --- GB 17625.1-2012 Electromagnetic compatibility - Limits for harmonic current emissions (equipment input current ≤16A) (IEC 61000-3-2.2009, IDT) --- Test GB/T 17626.7-2008 Electromagnetic compatibility - Testing and measurement techniques - power supply systems and equipment connected harmonics, interharmonics Quantity measuring instruments and guidelines (IEC 61000-4-7.2002, IDT) This section makes the following editorial changes. The standard name --- this section be changed to "Electromagnetic compatibility limits the input current is greater than 16A per phase 75A or less connected to the public Equipment produced by a low pressure system harmonic current limits "; --- IEC 61000-3-12.2004 IEC 61000-3 series of standards to Part 12, according to an "EMC limits" Country Number of sort criteria, this part of the standard Part 8 pairs should be; --- Deleted IEC 61000-3-12.2004 English original foreword and introduction. Electromagnetic Compatibility This part of the National Standardization Technical Committee (SAC/TC246) and focal points. This section drafted by. China Electric Power Research Institute, State Grid Electric Power Research Institute, Wuhan NARI limited liability company, Carey Power Supply Bureau. The main drafters of this section. Zhang Guangzhou, Wan Baoquan, Li Ni, Wang Jianhua, Pei Chunming, dry Zhe Yuan, Xing hair, Xiehui Chun, Yin-ting. Electromagnetic compatibility limits input current is greater than each 16A 75A or less connected to the public low System equipment generates harmonic current limits 1 Scope This section refers to the injection of public power supply system harmonic current limits. A) requirements and emission limits for equipment. b) type testing and simulation methods. Note 1.According to the test in this section is a complete one-piece type test equipment. Note 2.This section Compliance may also be verified simulation methods to determine. This section applies to every phase rated current greater than 16A, less electrical and electronic equipment 75A of these devices intended to access the following classes Type of public low-voltage AC power distribution network. a) The nominal voltage of 220V and below, single-phase, two-wire or three-wire system. b) The nominal voltage of 380V and below, three-phase, three-wire or four-wire system. c) the nominal frequency of 50Hz. This section applies to the low-pressure access device intended public system. Does not apply to the proposed access only to medium or high voltage power supply system connected to the public Devices on its own low-voltage systems. Note 1.The scope of this section is defined in the device and connected to public low-voltage systems, since launching its own low-voltage systems installed in the device, can be pressed in the common coupling Point with the program IEC /T R61000-3-6 regulations, and/or controlled by the overall agreement between the user and the electricity sector. It expects its own system Operators in ensuring EMC management environment meet the requirements of IEC /T R61000-3-6 and/or contractual agreements manner. Note 2.If the device only access to its own system, the manufacturer should be indicated in the product documentation. Note 3.The input current of less than 16A per IEC 61000-3-2, but does not meet the standards set forth in the limits and requirements of professional equipment, every input current This section requires more than 16A and the equipment does not meet the limits, may allow connection to a particular type of low-voltage power supply system, see Appendix A. Note 4.This section limits do not apply to independent harmonic filters. Limits given in this section (see Chapter 5) adapted to be connected to a 220/380V, 50Hz system equipment connected to other distribution systems The device is not included in this range. NOTE. The limits applicable to other systems will increase in this part of the other editions in the future. 2 Normative references The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. IEC 60038 IEC standard voltage (IEC standardvoltages) IEC 60050-161 International Electrotechnical Vocabulary (IEV) Chapter 161.Electromagnetic compatibility [InternationalElectrotechnicalVocab- ulary (IEV) -Chapter161.Electromagneticcompatibility] IEC 61000-2-2 Electromagnetic compatibility (EMC) - Part 2-2.Environmental Public voltage power supply system frequency conducted disturbances and signaling Level compatible lose [Electromagneticcompatibility (EMC) -Part 2-2.Environment-Compatibilitylevels forlow-frequencyconducteddisturbancesandsignalinginpubliclow-voltagepowersupplysystems] IEC 61000-2-4 Electromagnetic compatibility (EMC) - Part 2-4.Environmental plant frequency conducted disturbances compatibility level [Electro- magneticcompatibility (EMC) -Part 2-4.Environment-Compatibilitylevelsinindustrialplantsfor low-frequencyconducteddisturbances] IEC 61000-3-2 Electromagnetic compatibility (EMC) Part 3-2.Limits for harmonic current emissions (equipment input current ≤16A) [Electromagneticcompatibility (EMC) -Part 3-2.Limits-Limitsforharmoniccurrentemis- sions (equipmentinputcurrent≤16Aperphase] IEC 61000-4-7 Electromagnetic compatibility (EMC) - Part 4-7.Testing and measurement techniques power supply systems and equipment connected harmonics, harmonic Measurements and instrumentation, wave guide between the [Electromagneticcompatibility (EMC) -Part 4-7.Testingand measurementtechniques-Generalguideonharmonicsandinterharmonicsmeasurementsandinstru- mentation, forpowersupplysystemsandequipmentconnectedthereto] 3 Terms and Definitions IEC 60050 (161) defined by the following terms and definitions apply to this document. 3.1 THD totalharmonicdistortion THD Harmonic rms (In the n-th harmonic current) and its square ratio of the rms fundamental rms. THD = Σ n = 2 In I1 Note. According to IEC 61000-2-2 to select the definition. 3.2 Part weighted harmonic distortion partialweightedharmonicdistortion PWHD A set of valid values higher harmonics selected (from the beginning of the 14th harmonic) ratio of the fundamental RMS, weighted with the harmonic number n. PWHD = Σ n = 14 nInI1 Using some weighted harmonic distortion, it is to ensure that reduce the impact of higher harmonic currents on the measurement results, and does not require every Harmonic prescribed limits. 3.3 Point of common coupling pointofcommoncoupling; PCC Closest to the user, and other users can access or connection points on the public power supply system has access. 3.4 Single-phase equipment single-phaseequipment A device connected to the phase and neutral line. Note. Single-phase devices include those containing equipment connected to a single or multi-phase conductors and a neutral line between the load thereof. 3.5 White equipment interphaseequipment Two-phase equipment connected between the lines. Under normal operation, the neutral line is not as current carriers. 3.6 Three-phase equipment three-phaseequipment And three-phase line connected devices. Under normal operation, the neutral line is not as current carriers. Note. all three phases to be connected with the phase and neutral, and the neutral line as a current carrier equipment, believed to be three separate single-phase equipment. 3.6.1 Three phase equipment balancedthree-phaseequipment Device is connected to the three-phase three-phase power lines, and a three-wire (three phase) the same current amplitude and waveforms may be composed of any one of the other two phases are A relative phase shift of the fundamental period of 1/3 obtained. 3.6.2 Unbalanced equipment unbalancedthree-phaseequipment Device is connected to the three-phase three-phase power lines, and a three-wire (three-phase) current amplitude and waveform are not the same, or that between any two phases A phase difference is not equal to the fundamental period of 1/3. 3.7 Mixing equipment hybridequipment Device between phase and neutral or phase consisting of a balanced three-phase load and one or more load connection. 3.8 Short circuit capacity short-circuitpower Ssc Three-phase short-circuit capacity of the system by the nominal voltage at the PCC Unominal and line impedance Z is calculated. Ssc = U2nominal/Z Where. Z --- frequency under the system impedance. 3.9 The rated apparent power ratedapparentpoweroftheequipment Sequ Rated current rms Iequ equipment with rated voltage specified by the manufacturer's Up (single-phase) or Ui (phase) value calculated. a) Sequ = UpIequ (single-phase and single-phase equipment part mixing equipment). b) Sequ = UiIequ (white device). c) Sequ = 3UiIequ (part of a three-phase three phase equipment and mixing equipment). d) Sequ = 3UpIequmax (Unbalanced equipment, Iequmax flowing through the three phases of any one phase current RMS maximum). On voltage, Up or Ui is based on IEC 60038 nominal system voltage value (such as single-phase equipment for 220V, three-phase equipment to 380V). 3.10 Short circuit than short-circuitratio Rsce Eigenvalues define a single device as follows. a) Rsce = Ssc/(3Sequ) (single-phase and single-phase equipment part mixing equipment). b) Rsce = Ssc/(2Sequ) (white device). c) Rsce = Ssc/Sequ (three-phase and three-phase equipment part of all mixing equipment). Note 1.Rsce by the following formula directly with the known basic amount associated with. Rsce = U/(3 × Z × Iequ) (single-phase and single-phase equipment part mixing equipment). Rsce = U/(2 × Z × Iequ) (white devices). Rsce = U/(3 × Z × Iequ) (part of a three-phase three phase equipment and mixing equipment). Rsce = U/(3 × Z × Iequmax) (Unbalanced equipment). Where. U = Unominal, assumed to be equal Ui or 3 × Up, both available. Note 2.As defined Rsce and Rsc shown in IEC /T R61000-2-6 defined differently. Note 3.For a mixing device, method of calculating individual Rsce values given in 5.2. 3.11 Fundamental reference current referencefundamentalcurrent I1 Rms fundamental component of the rated line current Iequ (see 4.1). 3.12 Total harmonic current totalharmoniccurrent THC Party 2 to 40 times harmonic current component rms values. THC = Σ n = 2 I2n 3.13 Standby mode stand-bymode Sustainable indefinite period of time a non-running, low-power consumption mode (usually in some form is displayed on the device). Note. Sometimes referred to as sleep mode. 3.14 Associated with the fundamental phase voltage Up1 5th harmonic current (I5) phase angle phaseangleofI5relatedtothefundamental phasevoltageUp1 Figure 1 and Figure 2 to determine the phase angle of the 5th harmonic current. Definition 1 5th harmonic current phase angle diagram (I5 leading Up1, α5 > 0) 2 5th harmonic current phase angle definition Figure (I5 lag Up1, α5 < 0) 3.15 Professional equipment professionalequipment Specially designed by the manufacturer for trade, occupation or industry and is not ready for sale to the general public of the device. 4 Measurement Conditions 4.1 fundamental reference current Defined as 3.11, the fundamental reference currents I1, can be measured or calculated by the following method. a) If you get the fundamental reference current by measuring the average of the measurements shall be in accordance with the provisions of 4.2.2 Methods of measurement of harmonic currents Processing. During the measurement of the fundamental reference current, the device shall be equal to the line current rms rated the maker Ming radio Flow Iequ. b) If you get the fundamental reference current calculated using the following formula use Iequ rated line current is calculated. I1 = Iequ 1 THD2 This fundamental reference current value shall be determined by the manufacturer and indicated in the test report, this value will be used in Tables 2 and 4, for determining Given harmonic current emission limits. In accordance with provisions of this chapter, by transmitting the test, rather than the fundamental reference current value of the original manufacturer's conformity assessment test measured, not low 90% determined by the manufacturer in the test report the fundamental reference current value or higher than 110%. In the measured value exceeds the allowable range specified value Under the circumstances, it should be measured with reference to the fundamental current set limit. 4.2 Measurement of harmonic currents The specified device harmonic current limit applies to all types of power connections and load line current. Ignore less than 1% of the fundamental reference current single harmonic currents. 4.2.1 Overview The specified device harmonic current limit applies to all types of power connections and load line current. Less than 1% of the fundamental reference Ignore Current single harmonic currents. 4.2.2 measuring program Measurement of harmonic currents shall be in accordance with the following steps. --- For each harmonic, measurement 1.5s smoothed harmonic currents valid for each discrete Fourier transform (DFT) time window Value, as stipulated in IEC 61000-4-7; --- For each harmonic in the entire observation period specified in 4.2.7, calculate the arithmetic mean of the DFT time window measured values. Chapter 7 gives the measured or calculated harmonic current test conditions. 4.2.3 Repeatability This is a measurement system verification test requirements, rather than the requirements for each product tested. Repeatability of the measurement should be better than. --- ± 5% (applies to the fundamental and harmonic 7 and below); --- ± 10% (applies to more than 7 times harmonic) or ± 1% of the fundamental reference current, whichever is greater, Need to meet the following conditions. --- The same test equipment (EUT) (not the same type of another, even though they are similar); --- The same test conditions; --- The same test system; --- The same weather conditions (if relevant). 4.2.4 Start and Stop When a device manually or automatically put into or out of operation, since switching from the original 10s or until fully invested since switching Or decommissioning process, no matter what situation a long time, not to consider harmonic currents. Time test device is in standby mode (see 3.13) should not exceed 10% in any one observation period. 4.2.5 Application limits The entire test observation period, the average value of a single harmonic current should be less than or equal to Tables 2 to 4, the applicable limits. For each harmonic, harmonic current RMS all 1.5s 4.2.2 defined smoothed, should be less than or equal to the applicable limits 150%. 4.2.6 Test Report The test report can be provided to the information according to the manufacturer's testing facility or the manufacturer's own test record file details. experiment report It should include all relevant test conditions, the test observation period and meet current standards require fundamental reference current. The test report shall include. --- Rated line current Iequ; --- Specify the fundamental reference current value I1; --- For testing or calculated short circuit ratio; --- Minimum short circuit ratio requirements; --- Applicable declaration form (that is, the type of device). 4.2.7 Test observation period Four different types of equipment operation Tobs observation period are shown in Table 1. Value Table 1 observation period Equipment operation type observation period Quasi-steady Tobs sufficient duration to meet the requirements for repeatability 4.2.3 Short period (Tcycle≤2.5min) Tobs > 10 cycles (reference method), or Tobs a sufficiently long duration or synchronization to meet 4.2.3 Off In a repetitive requirements Random Tobs sufficient duration to meet the requirements of 4.2.3 regarding repeatability Long period (Tcycle > 2.5min) The entire equipment program cycle (reference method) or by the manufacturer during the run-up to consider a representative of THC 2.5min period of time use a "sync" means that the entire observation period and include such repetitive so that 4.2.3 is satisfied exact integer device cycle is very close. 4.3 consists of several components consisting of equipment For the combination of a number of independent components of the device in a rack or enclosure (possibly but not necessarily produced by different manufacturers), the Whether the system as a whole or for each individual component self-determined by the manufacturer shall comply with existing standards. 5 equipment requirements and limits 5.1 Control Method Under normal operating conditions only allow symmetrical control methods [see the definition of IEC 60050 (161) of 161-07-11]. It may produce low harmonics (n≤40) in the input current, and symmetrical control method for controlling the heating element power supply, allowing only for Professional equipment, professional equipment which as a whole is not the main purpose for heating. In addition, the following three conditions apply. a) When the power input test does not exceed the relevant limit. b) it is necessary to precisely control the temperature of the heater time constant of less than 2s. c) there is no other viable economic methods. Note. For purposes of this section, we shall burst trigger symmetrical control. 5.2 emission limits Limits given apply to 220V/380V, 50Hz system. Specified in the table harmonic current limits apply to each line current and not the neutral current. Rated current of a plurality of devices, each deal with a current assessment. Example.(the same device) Rated voltage single phase 220V, rated current per phase xA, at 220V under test and assessment. Rated voltage three-phase 380V, rated current per phase yA, 380V in the test and assessment. Tables 2 to 4, of the harmonic current limits. In line with the short-circuit ratio Rsce = 33 corresponds to the harmonic current limits of the device can be connected to any point of the power supply system. Note 1.The limit is based on the minimum value Rsce = 33, the short-circuit ratio of less than 33 will not be considered. Note 2.In order to reduce the inverter commutation rectifier trigger generating commutation notch depth necessary to require short-circuit ratio greater than 33. Do not meet the short-circuit ratio Rsce = 33 corresponds to the harmonic current limits of the equipment, if a short circuit is greater than 33, allowing higher harmonic emission values. This is expected to apply to most every phase input current exceeds 16A devices. The manufacturer must assume a Rsce value. See Chapter 6, product requirements documents. Table 2 applies to devices other than three phase equipment, Tables 3 and 4 apply to three phase equipment. If any of the following conditions are met, they can apply to Table 4 (for three phase equipment). a) throughout the observation period, with respect to the fundamental phase voltage, the fifth harmonic current phase angle between 90 ° ~ 150 °. Note. With uncontrolled rectifier bridge and includes a 3% or 4% AC DC reactor capacitive filter device, usually meet this condition. b) If the phase angle of the harmonic current 5 device no dominant value, any value in the whole interval [0 °, 360 °] on. Note. The full-controlled thyristor rectifier bridge configuration generally satisfy this condition. c) throughout the observation period, 5th, 7th harmonic current of less than 5% of the fundamental reference current. NOTE. 12 pulsation device generally satisfy this condition. In any of these cases, Table 3 or Table 4 can be applied to mixing equipment. Maximum 3 harmonic current a) mixing device is less than 5% of the fundamental reference current. b) isolation and single-phase or three phase alternating load supply current agreement when measuring in manufacturing a hybrid device, the measurement When the current assembly of the device being measured should be the same under normal operating conditions. In this case, the relevant limits should be separately For single-phase, three phase alternating loads and loads. Table 3 or Table 4 is suitable for three phase current to the load applied to Table 2 Single-phase alternating current or load. When the condition b), the manufacturer shall be marked with the rated current of each individual load to prepare for verification. Rsce value of such mixing equipment Ssc is determined by the maximum value, Ssc value calculated for each load from the table minimum Rsce OK. Table 2 shall apply in addition to the current emission limits than the three phase equipment equipment Least Rsce Acceptable single harmonic current In/I1a Acceptable harmonic current distortion I3 I5 I7 I9 I11 I13 THD PWHD 33 21.6 10.7 7.2 3.8 3.1 22 323 66241385432626 1,202,715,106,543,030 2,503,520,139,864,040 ≥350 41 24 15 12 10 8 47 47 Note 1.12 times the current value or less even harmonics should not exceed (16/n)%. 12 times more than the even harmonics and odd harmonics and THD with the same PWHD consideration. Note 2.allows linear interpolation between two successive Rsce. See Appendix D. aI1 is the fundamental reference current value, In the harmonic current components. Table 3 For three phase current emission limits for equipment Least Rsce Acceptable single harmonic current In/I1a Acceptable harmonic current distortion I5 I7 I11 I13 THD PWHD 33 10.7 7.2 3.1 21 322 66149531625 1201912742228 25031201273738 ≥350 40 25 15 10 48 46 Note 1.12 times the current value or less even harmonics should not exceed (16/n)%. 12 times more than the even harmonics and odd harmonics and THD with the same PWHD consideration. Note 2.allows linear interpolation between two successive Rsce. See Appendix D. aI1 is the fundamental reference current value, In the harmonic current components. Table 4 Current emission limits applicable to the conditions specified in the three phase equipment Least Rsce Acceptable single harmonic current In/I1a Acceptable harmonic current distortion I5 I7 I11 I13 THD PWHD 33 10.7 7.2 3.1 21 322 ≥120 40 25 15 10 48 46 Note 1.12 times the current value or less even harmonics should not exceed (16/n)%. 12 times more than the even harmonics and odd harmonics and THD with the same PWHD consideration. Note 2.allows linear interpolation between two successive Rsce. See Appendix D. aI1 is the fundamental reference current value, In the harmonic current components. Table 2 to Table 4, the application process flow chart shown in Figure 3. Figure 3 Table 2 to Table 4 using the flowchart 6 Product documentation In line with the short-circuit ratio Rsce = 33 corresponds to the harmonic current limits of the equipment, the manufacturer shall, in its instructio... ......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.

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