1、 INTERNATIONAL TELECOMMUNICATION UNION ITU-T K.63TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (02/2004) SERIES K: PROTECTION AGAINST INTERFERENCE Maintaining the suitability of production telecommunications equipment to its intended electromagnetic environment ITU-T Recommendation K.63 ITU-T Rec.
2、 K.63 (02/2004) i ITU-T Recommendation K.63 Maintaining the suitability of production telecommunications equipment to its intended electromagnetic environment Summary This Recommendation suggests some Electromagnetic Compatibility tests that may be used by both Telecommunications Operators and Equip
3、ment Manufacturers to determine the suitability of a batch of Telecommunications Equipment to its intended Electromagnetic Environment. It is recognized that variation will occur between the Electromagnetic Compatibility performance of the Telecommunications Equipment item tested to demonstrate comp
4、liance with market entry requirements and the Electromagnetic Compatibility performance of Telecommunications Equipment items manufactured subsequently. Hence variation in the Electromagnetic Compatibility performance will be seen within a batch of Telecommunications Equipment either received by the
5、 Telecommunications Operator or manufactured by the Equipment Manufacturer. Methods to allow both Telecommunications Operators and Equipment Manufacturers to demonstrate the compliance of a batch of Telecommunications Equipment are therefore needed. As it is not economically feasible to test the Ele
6、ctromagnetic Compatibility performance of every item within the batch, this Recommendation suggests that just three tests be performed on a small number of Equipment items selected at random from the batch. The recommended tests are Radiated Emissions, Electrostatic Discharge and Electrical Fast Tra
7、nsient. It is the past experience of Telecommunications Operators that the largest variation in performance occurs for these three tests. Telecommunications Operators may therefore use this Recommendation to assure the suitability of a batch of equipment received from a manufacturer. Equipment Manuf
8、acturers may use this Recommendation to monitor the variation in Electromagnetic Compatibility performance from their manufacture line. Source ITU-T Recommendation K.63 was approved on 29 February 2004 by ITU-T Study Group 5 (2001-2004) under the ITU-T Recommendation A.8 procedure. ii ITU-T Rec. K.6
9、3 (02/2004) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in the field of telecommunications. The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff qu
10、estions and issuing Recommendations on them with a view to standardizing telecommunications 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 Recommendati
11、ons on these topics. The approval of ITU-T Recommendations is covered by the procedure 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
12、, the expression “Administration“ is used for conciseness to indicate both a telecommunication 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
13、applicability) and compliance with the Recommendation is achieved when all of 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 w
14、ith the Recommendation is required of any party. INTELLECTUAL PROPERTY RIGHTS ITU 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 app
15、licability of claimed Intellectual Property Rights, whether asserted by ITU members 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 imp
16、lement this Recommendation. However, implementors are cautioned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database. ITU 2004 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the pr
17、ior written permission of ITU. ITU-T Rec. K.63 (02/2004) iii CONTENTS Page 1 Scope 1 2 Normative references 1 3 Terms and definitions . 1 4 Abbreviations and acronyms 2 5 Classification of equipment suitability . 2 6 EMC tests . 3 6.1 Normal operational conditions . 3 6.2 Emissions tests 3 6.3 Immun
18、ity tests 4 iv ITU-T Rec. K.63 (02/2004) Introduction It is recognized that variation will occur between the Electromagnetic Compatibility performance of the Telecommunications Equipment item tested to demonstrate compliance with market entry requirements and the Electromagnetic Compatibility perfor
19、mance of Telecommunications Equipment items manufactured subsequently. Hence variation in the Electromagnetic Compatibility performance will be seen within a batch of Telecommunications Equipment either received by the Telecommunications Operator or manufactured by the Equipment Manufacturer. Method
20、s to allow both Telecommunications Operators and Equipment Manufacturers to demonstrate the compliance of a batch of Telecommunications Equipment are therefore needed. As it is not economically feasible to test the Electromagnetic Compatibility performance of every item within the batch, this Recomm
21、endation suggests that just three tests be performed on a small number of Equipment items selected at random from the batch. The recommended tests are Radiated Emissions, Electrostatic Discharge and Electrical Fast Transient. It is the past experience of Telecommunications Operators that the largest
22、 variation in performance occurs for these three tests. ITU-T Rec. K.63 (02/2004) 1 ITU-T Recommendation K.63 Maintaining the suitability of production telecommunications equipment to its intended electromagnetic environment 1 Scope This Recommendation suggests some Electromagnetic Compatibility tes
23、ts that may be used by both Telecommunications Operators and Equipment Manufacturers to determine the suitability of a batch of Telecommunications Equipment to its intended Electromagnetic Environment. This Recommendation is not intended to be applied for conformity test. 2 Normative references The
24、following 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
25、Recommendation 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
26、 not give it, as a stand-alone document, the status of a Recommendation. 1 ITU-T Recommendation K.48 (2003), EMC requirements for each telecommunication equipment Product family Recommendation. 2 IEC 60050-161 (1990-09), International Electrotechnical Vocabulary. Chapter 161: Electromagnetic compati
27、bility. 3 IEC CISPR 22 (2003-04), Information technology equipment Radio disturbance characteristics Limits and methods of measurement. 4 IEC 61000-4-2 (2001-04), Electromagnetic compatibility (EMC) Part 4-2: Testing and measurement techniques Electrostatic discharge immunity test. 5 IEC 61000-4-4 (
28、1995-01), Electromagnetic compatibility (EMC) Part 4: Testing and measurement techniques Section 4: Electrical fast transient/burst immunity test. 3 Terms and definitions The following definitions are based on the International Electrotechnical Vocabulary 2: 3.1 electromagnetic compatibility (161-01
29、-07): The ability of an Equipment or System to function satisfactorily in its electromagnetic environment without introducing intolerable electromagnetic disturbance to anything in that environment. 3.2 electromagnetic environment (161-01-01): The totality of electromagnetic phenomena existing at a
30、given location (in general this totality is time dependent and its description may need a statistical approach). 3.3 radiated emission (161-01-08): The phenomenon by which energy in the form of electromagnetic waves emanates from a source into space (energy transferred through space in the form of e
31、lectromagnetic waves). 3.4 electrostatic discharge (161-01 22): A transfer of electric charge between bodies of different electrostatic potential in proximity or through direct contact. 2 ITU-T Rec. K.63 (02/2004) 3.5 electrical fast transient (161-02-07): A sequence of a limited number of distinct
32、pulses or an oscillation of limited duration. 3.6 electromagnetic disturbance (161-01-05): Any electromagnetic phenomenon that may degrade the performance of Equipment. Examples include EMF, ESD and EFT. 3.7 electromagnetic interference (161-01-06): Degradation to the performance of a piece of Equip
33、ment caused by an electromagnetic disturbance. 3.8 immunity (161-01-20): The ability of an electrical or electronic product to operate as intended without performance degradation in the presence of an electromagnetic disturbance. 4 Abbreviations and acronyms This Recommendation uses the following ab
34、breviations: AC Alternating Current DC Direct Current EFT Electrical Fast Transient EM ElectroMagnetic EMF ElectroMagnetic Fields EMC ElectroMagnetic Compatibility ESD ElectroStatic Discharge EUT Equipment Under Test I/O Input/Output 5 Classification of equipment suitability This Recommendation defi
35、nes three classes of equipment suitability to its intended EM environment. Class I Equipment: Equipment suitable for location within its intended environment. (The probability that the EM environment could create disturbances to the equipment, or that the equipment could create interference to other
36、 telecommunication equipment installed in the same environment is very low.) Class II Equipment: Equipment with acceptable performance for location within its intended environment. (The probability that the EM environment could create disturbances to the equipment, or that the equipment could create
37、 interference to other telecommunication equipment installed in the same environment is low.) Class III Equipment: Equipment not suitable for location within its intended environment. (The probability that the EM environment could create disturbances to the equipment, or that the equipment could cre
38、ate interference to other telecommunication equipment installed in the same environment is high.) ITU-T Rec. K.63 (02/2004) 3 6 EMC tests The following EMC tests are suggested to evaluate the suitability of Telecommunications Equipment to its intended Electromagnetic Environment: radiated emission;
39、ESD immunity; EFT immunity. Tests should be made on a small number of Equipment items selected at random as follows: for the Telecommunications Operator: Equipment selected from the shipment received from the manufacturer; for the Equipment Manufacturer: Equipment selected from the manufacturing pro
40、cess. 6.1 Normal operational conditions The Equipment specific operating conditions will be derived from the product descriptions and documentation; this information will be stated within the Equipments EMC report. The general operational conditions shall allow for appropriate emissions measurement
41、and for immunity testing. The tests described shall be performed with the EUT operating in a manner that is representative of intended and normal operation. Grounding, interconnecting cabling and physical placement of the Equipment shall simulate the typical application. 6.2 Emissions tests 6.2.1 Ra
42、diated emissions tests The requirements for radiated emissions are presented in Table 1 and the evaluation criteria are presented in Table 2; the test procedure is given in ITU-T Rec. K.48 1 and in IEC CISPR 22 3. Table 1/K.63 Requirements for radiated emission Port Test specification Intended envir
43、onment Reference standard Enclosure Class A Telecom centres IEC CISPR 22 3 Enclosure Class B Outdoor locations, customer premises IEC CISPR 22 3 NOTE If equipment can be installed in either intended environment, Class B shall be applicable. Radiated emission measurement shall be performed on the who
44、le system; all interconnection cables shall be connected to the EUT in a manner typical of intended use. The configuration of the EUT and interconnecting cables shall be adjusted during the test to allow measurement of the maximum possible disturbance. 6.2.2 Evaluation criteria for the results of ra
45、diated emission tests Equipment performance to radiated emissions testing is classified according to clause 5 using the criteria presented in Table 2: 4 ITU-T Rec. K.63 (02/2004) Table 2/K.63 Equipment performance criteria for radiated emission Equipment class Evaluation criteria I The maximum Equip
46、ment emissions level is more than 4 dB below Electromagnetic Environment limit II The maximum Equipment emissions are between 4 dB below the limit and 4 dB above the limit itself III The maximum Equipment emissions is more than 4 dB above the limit 6.3 Immunity tests 6.3.1 Immunity to ESD The requir
47、ements for immunity to ESD are presented in Table 3. Table 3/K.63 Immunity requirements for ESD Test Test specification Reference standard ESD 8 kV indirect discharge 8 kV air discharge 4 kV contact discharge IEC 61000-4-2 4 6.3.2 Immunity to EFT The requirements for immunity to EFT are presented in
48、 Table 4. IEC 61000-4-4 5 gives the test procedure. Common and differential mode coupling methods on a.c. mains are described in IEC 61000-4-4 5. The test level presented in Table 4 is to be applied for both differential and common mode tests. Test on I/O signal ports shall be applied in common mode
49、 only. Table 4/K.63 Immunity requirements for EFT On power supply port On I/O signal, data and control ports Voltage peak kV Repetition rate kHz Voltage peak kV Repetition rate kHz 1 (a.c.) 0.5 (d.c.) 5 0.5 5 6.3.3 Evaluation criteria for the result of immunity test to ESD and EFT Equipment performance to immunity testing is classified according to Clause 5 using the criteria presented in Table 5. Table 5/K.63 Equipment performance criteria for immunity test to ESD or EFT Equipment class Evaluation criteria I During an
