IEC标准中的EMC测试要求介绍

1、R05/01/99Standards 61World Standard & LegislationEMCR05/01/99Standards 62World Standards and Legislation Many countries have introduced legislation to limit emissions from electrical equipment Some countries have introduced voluntary codes Some industries have introduced their own rulesR05/01/99

2、Standards 63Europe!Some countries in Europe have had limits for emissions from some products for many years!Enforcement was low and variableR05/01/99Standards 64The European Single Market This changed with the introduction of the single market in Europe Individual member countries legislation was se

3、en as a potential barrier to trade The EEC directive on EMC was intended to give one standard for all of EuropeR05/01/99Standards 65Legislation!All electrical goods being placed on the market in the EU must carry a CE marking marking can be: on the device on the packaging in the hand book or any com

4、bination of the above!Legislation covers Emissions and ImmunityR05/01/99Standards 66Responsibility!Responsibility for compliance is with the company who “places the product on the market” in the EU!If this is an agent, his declaration could rely on testing performed at the place of manufactureR05/01

5、/99Standards 67Notes!CE marking covers more than just EMC!CE marking declares that the product complies with all relevant EU directives!EMC directive covers all electrical and electronic equipment!Only exceptions are products covered by other directives which contain EMC requirements and, in some ci

6、rcumstances, componentsR05/01/99Standards 68Legal Requirements!To carry a CE marking, a certificate of conformity must be available!A certificate of Conformity declares that the equipment meets the essential requirements of 89/336/EEC!A Certificate of Conformity must be signed by a responsible perso

7、n from the manufacturer or importerR05/01/99Standards 69United States!FCC Part 15 Legal requirement for all ITE equipment Emissions only Tests can only be performed in FCC approved laboratoriesR05/01/99Standards 610Japan Voluntary standards under the VCCI scheme have existed in Japan since late 1985

8、. VCCI covers data processing and office automation equipment. Although voluntary, VCCI is very strongly supported in Japan. General movement towards adopting IEC standards.R05/01/99Standards 611Japan VCCI standards for emissions are identical to CISPR 22 VCCI Class 1 = CISPR 22 Class A VCCI Class 2

9、 = CISPR 22 Class BR05/01/99Standards 612Japan It is planned that in 1998 ? (date not fixed), that a Japanese Industry Standard, JIS, will be published to cover all kinds of equipment. CISPR measurement methods will be used, however, the levels are as yet unknown.R05/01/99Standards 613Taiwan!Legal F

10、ramework Enforced by BCQI (Bureau of Commodity and Quarantine Inspection) Type approval method Random sampling to ensure compliance Standards based in IEC and CISPR!Only EMI at this time but EMS is under considerationR05/01/99Standards 614Taiwan!Law applies only to: photocopiers ITE Household applia

11、nces Fax machines, modems Television and video recorders Microwave ovens Electrical tools Telephone Audio Equipment Other products are to be added laterR05/01/99Standards 615Australia The ACA EMC Framework is now mandatory for the commercial, residential and light industry environment, and covers a

12、large range of commercially available products Carries force of law from January 1, 1997 Although only emission standards have been defined.R05/01/99Standards 616ACA Compliance Defines the process for demonstrating compliance. Self certification Technical construction file Standards are produced by

13、Standards Australia. C-Tick Mark is used to denote compliance with EMC standardsR05/01/99Standards 617Not Only LegislationR05/01/99Standards 618Commercial You may need to meet EMC limits for commercial or contractual reasons customer may have specific concerns about reliability of systems customer m

14、ay be trying to make the EMC conformity of his equipment easier EMC performance may be part of his contract and these could be more severe than legal requirementsR05/01/99Standards 619Health and Safety!EMC failures could cause damage or injury to customers or the public!This could be a greater conce

15、rn than the EMC directive remember compliance with a standard may not be enough Particularly for safety critical equipment consider the actual environment in which the equipment will be usedR05/01/99Standards 620Reliability!EMC can be seen as a reliability issue Failures in equipment due to suscepti

16、bility can be difficult to reproduce in the service laboratory Equipment may be returned to the customer“no fault found”!After several cycles the customer may conclude that the equipment is unreliable!R05/01/99Standards 621StandardsR05/01/99Standards 622IEC!International Electro-technical Commission

17、 Produce basic standards for Immunity!International Special Committee for Radio Interference(CISPR) Sub committee of IEC Set up to produce standards for emissions testing and equipmentR05/01/99Standards 623IEC 61000!Basic standards for Immunity defines test equipment defines test methods suggests te

18、st levelsR05/01/99Standards 624Basic StandardsIEC 61000-3-2Mains Power HarmonicsIEC 61000-3-3Mains Power FlickerIEC 61000-4-2Electro-static dischargeIEC 61000-4-3Radiated RF ImmunityIEC 61000-4-4Electrical Fast TransientsIEC 61000-4-5Surge Immunity IEC 61000-4-6 Conducted RF ImmunityIEC 61000-4-8 Po

19、wer Frequency magnetic fieldIEC 61000-4-9Pulse magnetic fieldIEC 61000-4-10Damped Oscillatory magnetic fieldIEC 61000-4-11Voltage dips, interruptions and variationsR05/01/99Standards 625Immunity Standards!Generic EN 50082-1 Residential, commercial EN 50082-2 Industrial!Product specific EN 55014-2 Do

20、mestic products EN 55020Broadcast receivers EN 61547Lighting equipmentR05/01/99Standards 626CISPR!Defines the basic standards for emission testing CISPR 16 Defines test equipment CISPR 11 Limits and methods for ISM equipment CISPR 13 Limits and methods for broadcast receivers CISPR 14 Limits and met

21、hods for household appliances CISPR 15 Limits and methods for lighting equipment CISPR 22 Limits and methods for ITE equipment New editions of CISPR 11 and CISPR 22 are now available (minor changes to 11 significant changes to 22)R05/01/99Standards 627CISPR / EN!Most CISPR standards have been adopted as EN (Euro Norm) product specific