1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T K.123 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (12/2016) SERIES K: PROTECTION AGAINST INTERFERENCE Electromagnetic compatibility requirements for electrical equipment in telecommunication facilities Recommendation IT
2、U-T K.123 Rec. ITU-T K.123 (12/2016) i Recommendation ITU-T K.123 Electromagnetic compatibility requirements for electrical equipment in telecommunication facilities Summary Recommendation ITU-T K.123 describes the requirements for radiated and conducted emissions from electrical systems installed i
3、n telecommunication facilities. Electrical systems in the scope of this Recommendation include rectifiers that supply direct current (DC) voltages of up to 400 V, power conditioning systems (PCSs) including grid connected power converters (GCPCs), uninterruptible power supplies (UPSs) and inverter d
4、riven electrical equipment including the air conditioners needed for the operation of telecommunication systems. Their electrical systems include power conversion devices and may generate conducted and radiated electromagnetic disturbances and cause degradation of the performance of telecommunicatio
5、n systems. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T K.123 2016-12-14 5 11.1002/1000/13139 Keywords Conducted emission, electrical system, power conversion device, radiated emission, telecommunication facility. * To access the Recommendation, type the URL http:/handle.
6、itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T K.123 (12/2016) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telec
7、ommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to standardizing telecom
8、munications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is covered by the pro
9、cedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to indicate both a tel
10、ecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is achieved when all of
11、these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTSI
12、TU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether asserted by ITU mem
13、bers or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautioned that this may n
14、ot represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2017 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of ITU. Rec. ITU-T K.123
15、 (12/2016) iii Table of Contents Page 1 Scope . 1 2 References . 1 3 Definitions 2 3.1 Terms defined elsewhere 2 3.2 Terms defined in this Recommendation . 3 4 Abbreviations and acronyms 3 5 Conventions 4 6 Connection of equipment in telecommunication centre . 4 7 Emissions from 150 kHz to 6 GHz . 5
16、 7.1 Test methods and limits 5 7.2 Operational conditions 7 7.3 Test configuration . 8 8 Guidance on noise other than emissions from 150 kHz to 6 GHz 10 8.1 Requirements for harmonic currents and voltage change on AC input ports 10 8.2 Noise on DC output port. 10 8.3 Noise on AC output ports . 10 Bi
17、bliography. 11 iv Rec. ITU-T K.123 (12/2016) Introduction Recently, an increasing number of electrical devices that involve high power switching circuits have been installed in telecommunication facilities. These include rectifiers that supply DC voltages up to 400 V, power conditioning systems (PCS
18、s) including grid connected power converters (GCPCs), uninterruptible power supplies (UPSs) and air conditioners. Moreover, the power dealt with in these electrical devices has been increasing with their increase in number and the consumption requirements of telecommunication equipment installed in
19、a facility, in accordance with the growth of information and communication technology (ICT) companies. Therefore, the possibility of interference with telecommunication systems due to emissions from these electrical systems is increasing. Even though ITU-T K.48 specifies emission requirements for te
20、lecommunication equipment, including power equipment, such as rectifier units, UPSs and DC distribution systems, the emission requirements for electrical systems that are not integral parts of telecommunication systems are not clearly specified in the Recommendation. CISPR 11 specifies emission requ
21、irements for switching power equipment, however, it does not specify requirements above 1 GHz. Also, the emission level limit in CISPR 11 from photovoltaic power generating systems with a rated power from 20 kVA to 75 kVA is about 20 dB higher than the requirements for the telecommunication equipmen
22、t regulated in CISPR 32. The systems installed in a telecommunication centre are sensitive to electromagnetic disturbances, since their immunity is designed and tested to meet the requirements of the controlled electromagnetic environment of the centre. Therefore, the telecommunication systems are a
23、t risk of malfunction if large power appliances are installed in such centres without limiting their electromagnetic emissions appropriately. Consequently, the limits of emission levels from electrical systems installed in telecommunication facilities should be the same as the levels required for cl
24、ass A equipment in CISPR 32. Rec. ITU-T K.123 (12/2016) 1 Recommendation ITU-T K.123 Electromagnetic compatibility requirements for electrical equipment in telecommunication facilities 1 Scope This Recommendation defines the emission requirements for electrical equipment that is installed in telecom
25、munication facilities. This Recommendation applies to power supply systems with embedded power conversion devices (e.g., DC to AC inverters, DC to DC, AC to DC and AC to AC converters), PCSs including GCPCs, UPSs and air conditioning systems. Lighting equipment is not addressed by this Recommendatio
26、n. This Recommendation specifies measurement methods and limits for conducted emissions in frequencies from 150 kHz to 30 MHz and for radiated emissions from 30 MHz to 6 GHz. Guidance on any unintentional voltage/current at AC and DC power ports is provided in this Recommendation. 2 References The f
27、ollowing ITU-T Recommendations and other references contain provisions which, through reference in this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated were valid. All Recommendations and other references are subject to revision; users of this R
28、ecommendation are therefore encouraged to investigate the possibility of applying the most recent edition of the Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is regularly published. The reference to a document within this Recommendation does
29、not give it, as a stand-alone document, the status of a Recommendation. ITU-T K.38 Recommendation ITU-T K.38 (1996), Radiated emission test procedure for physically large systems. ITU-T K.48 Recommendation ITU-T K.48 (2006), EMC requirements for telecommunication equipment Product family Recommendat
30、ion. CISPR 11 CISPR 11 Ed. 6.0:2015, Industrial, scientific and medical equipment - Radio-frequency disturbance characteristics - Limits and methods of measurement. CISPR 16-1-2 CISPR 16-1-2 Ed. 2.0:2014, Specification for radio disturbance and immunity measuring apparatus and methods Part 1-2: Radi
31、o disturbance and immunity measuring apparatus Coupling devices for conducted disturbance measurements. CISPR 16-1-4 CISPR 16-1-4:2010, Specification for radio disturbance and immunity measuring apparatus and methods - Part 1-4: Radio disturbance and immunity measuring apparatus - Antennas and test
32、sites for radiated disturbance measurements. CISPR 16-2-1 CISPR 16-2-1:2014, Specification for radio disturbance and immunity measuring apparatus and methods - Part 2-1: Methods of measurement of disturbances and immunity - Conducted disturbance measurements. CISPR 16-2-3 CISPR 16-2-3:2016, Specific
33、ation for radio disturbance and immunity measuring apparatus and methods - Part 2-3: Methods of measurement of disturbances and immunity - Radiated disturbance measurements. CISPR 32 CISPR 32 Ed. 2.0 (2015), Electromagnetic compatibility of multimedia equipment Emission requirements. 2 Rec. ITU-T K.
34、123 (12/2016) ETSI 300 132-2 ETSI EN 300 132-2 (2016), Environmental Engineering (EE); Power supply interface at the input to telecommunications and data com (ICT) equipment; Part 2: Operated by -48 V direct current (dc). http:/www.etsi.org/deliver/etsi_en/300100_300199/30013202/02.05.01_60/en_30013
35、202v020501p.pdf IEC 60050-161 IEC 60050-161:1990, International Electrotechnical Vocabulary Chapter 161: Electromagnetic compatibility. IEC 61000-3-2 IEC 61000-3-2 Ed. 4.0:2014, Electromagnetic compatibility (EMC) Part 3-2: Limits Limits for harmonic current emissions (equipment input current up to
36、and including 16 A per phase). IEC 61000-3-3 IEC 61000-3-3 Ed. 3.0:2013, Electromagnetic compatibility (EMC) Part 3-3: Limits Limitation of voltage changes, voltage fluctuations and flicker in public low-voltage supply systems, for equipment with rated current up to and including 16 A per phase and
37、not subject to conditional connection. IEC 62040-3 IEC 62040-3:2011, Uninterruptible power systems (UPS) Part 3: Method of specifying the performance and test requirements. 3 Definitions 3.1 Terms defined elsewhere This Recommendation uses the following terms defined elsewhere: 3.1.1 AC mains power
38、port CISPR 11: Port used to connect to a public low voltage AC mains power distribution network or other low voltage AC mains installation. 3.1.2 artificial mains network (AMN) CISPR 11: Network that provides defined impedance to the equipment under test (EUT) at radio frequencies, couples the distu
39、rbance voltage to the measuring receivers and decouples the test circuit from the supply mains. 3.1.3 DC artificial mains network (DC-AN) CISPR 11: Artificial network that provides defined termination to the EUTs DC power port under test while also providing the necessary decoupling from conducted d
40、isturbances originating from the laboratory DC power source or from the load. 3.1.4 DC power port CISPR 11: Port used to connect to a low voltage DC power generating system or energy storage, or to another source/load. 3.1.5 DC network power port CISPR 32: Port, not powered by a dedicated AC/DC powe
41、r converter and not supporting communication that connects to a DC supply network. 3.1.6 electromagnetic disturbance IEC 60050-161: Any electromagnetic phenomenon which may degrade the performance of a device, equipment or system, or adversely affect living or inert matter. 3.1.7 electromagnetic int
42、erference (EMI) IEC 60050-161: Degradation of the performance of an equipment, transmission channel or system caused by an electromagnetic disturbance. 3.1.8 enclosure port IEC 61000-6-6: A physical boundary of the apparatus which electromagnetic fields may radiate through or impinge upon. The equip
43、ment case is normally considered the enclosure port. 3.1.9 continuous disturbance ITU-T K.48: Electromagnetic disturbance whose effects on a particular device or piece of equipment cannot be resolved into a succession of distinct effects. 3.1.10 grid connected power converters CISPR 11: Power conver
44、ter connected to an AC mains power distribution network or other AC mains installation and used in a power generating system. Rec. ITU-T K.123 (12/2016) 3 3.1.11 high power electronic system and equipment CISPR 11: One or more semiconductor power converters with a combined rated power greater than 7
45、5 kVA, or an equipment containing such converters. 3.1.12 industrial, scientific and medical applications CISPR 11: Operation of equipment or appliances designed to generate and use locally radio frequency energy for industrial, scientific, medical, domestic or similar purposes, excluding applicatio
46、ns in the field of telecommunications. 3.1.13 signal/control port CISPR 32: Port intended for the interconnection of components of an EUT, or between an EUT and local AE and used in accordance with relevant functional specifications (for example for the maximum length of cable connected to it). 3.1.
47、14 photovoltaic power generating system CISPR 11: Electric power generating system which used the photovoltaic effect to convert solar power into electricity. 3.1.15 power supply ITU-T K.48: A power source to which telecommunication equipment is intended to be connected. 3.1.16 minimum representativ
48、e system ITU-T K.38: A system which contains the minimum number of units needed to perform all functions specified for the system. 3.2 Terms defined in this Recommendation This Recommendation defines the following term: 3.2.1 telecommunication facility: A building or place that provides telecommunic
49、ation services or is used for telecommunication equipment and is controlled by a telecommunication operator. 4 Abbreviations and acronyms This Recommendation uses the following abbreviations and acronyms: AC Alternating Current AMN Artificial Mains Network CISPR International Special Committee on Radio Interference CMAD Common Mode Absorption Device DC Direct Current DC-AN D.C. Artificial Network EMC Electromagnetic Compatibility EMI Electromagnetic Interference ETSI European Telecommu
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