Elec­tro­mag­netic com­pat­i­bil­ity test­ing in EMC lab EN 55011, CISPR 11

EN 55011:2016 Indus­trial, sci­en­tific and med­ical equip­ment– Radio-​frequency dis­tur­bance char­ac­ter­is­tics Lim­its and meth­ods of mea­sure­ment

Mod­i­fied: CISPR 11:2015 Indus­trial, sci­en­tific and med­ical equip­ment — Radio-​frequency dis­tur­bance char­ac­ter­is­tics — Lim­its and meth­ods of mea­sure­ment

Replace: EN 55011:2009+A1 Indus­trial, sci­en­tific and med­ical equip­ment– Radio-​frequency distur-​bance char­ac­ter­is­tics Lim­its and meth­ods of mea­sure­ment

New in this edi­tion: “It intro­duces and per­mits type test­ing on com­po­nents of power elec­tronic equip­ment, sys­tems and instal­la­tions. Its emis­sion lim­its apply now to low volt­age (LV) a.c. and d.c. power ports, irre­spec­tive of the direc­tion of power trans­mis­sion. Sev­eral lim­its were adapted to the prac­ti­cal test con­di­tions found at test sites. They are also applic­a­ble now to power elec­tronic ISM RF equip­ment used for wire­less power trans­fer (WPT), for instant power sup­ply and charg­ing pur­poses. The lim­its in the range 1 GHz to 18 GHz apply now to CW-​type dis­tur­bances and to fluc­tu­at­ing dis­tur­bances in a sim­i­lar, uni­form and technology-​neutral way. For these mea­sure­ments, two alter­na­tive meth­ods of mea­sure­ment are avail­able, the tra­di­tional log-​AV method and the new APD method. It has the sta­tus of a Prod­uct Fam­ily EMC stan­dard in accor­dance with IEC Guide 107, Elec­tro­mag­netic com­pat­i­bil­ity – Guide to the draft­ing of elec­tro­mag­netic com­pat­i­bil­ity pub­li­ca­tions (2014).”

Scope
Inter­na­tional stan­dard EN 55011:2016 is applic­a­ble to:

• indus­trial, sci­en­tific and med­ical (ISM) equip­ment. The fre­quency range of ISM equip­ment shall not exceed 400GHz;
• house­hold equip­ment and sim­i­lar equip­ment designed to gen­er­ate and/​or use locally radio-​frequency energy;

Clas­si­fi­ca­tion
Inter­na­tional stan­dard EN 55011:2016 sep­a­rates all equip­ment in two groups– Group 1 and Group 2, each group is sub­di­vided in two classes– class 1 and class 2.

Group 1- cov­ers all devices that are not cov­ered by group 2.
Group 2- cov­ers devices that inten­tion­ally gen­er­ates RF energy in fre­quency range 9kHz-​400GHz, that is used in form elec­tro­mag­netic radi­a­tion, induc­tive cou­pling, capac­i­tive cou­pling for mate­r­ial analy­sis or inspec­tion.

Class A- cov­ers devices for usage in all estab­lish­ments other than domes­tic and that are not directly con­nected to a low volt­age power sup­ply net­work, which sup­plies domes­tic envi­ron­ment.
Class B- cov­ers devices for usage in domes­tic estab­lish­ments that are directly con­nected to a low volt­age power sup­ply net­work, which sup­plies domes­tic envi­ron­ment.

If class A require­ments are applied, then fol­low­ing or sim­i­lar warn­ing shall be included in the instruc­tions for use:

Cau­tion

Exam­ples
Group 1– Med­ical, sci­en­tific, lab­o­ra­tory, indus­trial elec­tro heat­ing, indus­trial process mea­sure­ment and con­trol, semi­con­duc­tor man­u­fac­tur­ing equip­ment, machine tools, Indus­trial induc­tion heat­ing equip­ment that do not exceed 9kHz, semi­con­duc­tor con­vert­ers.
Group 2– Dielec­tric heat­ing equip­ment, microwave ovens, med­ical equip­ment, elec­tric weld­ing equip­ment, demon­stra­tion mod­els for edu­ca­tion and train­ing, induc­tion heat­ing equip­ment that exceeds 9 kHz, microwave-​powered UV irra­di­at­ing appa­ra­tus, microwave light­ing appa­ra­tus, induc­tive power transfer/​charging equip­ment.

Require­ments
Con­ducted emis­sions AC port 150kHz-​30MHz
Con­ducted emis­sions DC port 150kHz-​30MHz (grid con­nected power con­ver­tors (GCPCs) intended for assem­bly into pho­to­voltaic power gen­er­at­ing sys­tems)
Radi­ated emis­sions 150kHz-​1GHz

Con­ducted emis­sions AC port

Radi­ated emis­sions