emc基本原理家電ppt課件(2)-資料下載頁(yè)
2025-05-05 12:11本頁(yè)面
【正文】 ning ponents such as electromotors , electromechanical switches, thermostats, (rechargeable) batteries. ? Category II: mains powered motor operated appliances, tools, heating appliances and similar electric apparatus (for example – UV radiators, IR radiators and microwave ovens) containing electronic control circuitry with no internal clock frequency or oscillator frequency higher than 15 MHz. ? NOTE The value 15 MHz is tentative and may be modified after a period of experience. ? Category Ill: battery powered apparatus (with builtin batteries or external batteries), which in normal use is not connected to the mains, containing an electronic control circuitry with no internal clock frequency or oscillator frequency higher than 15 MHz. ? Category IV: all other apparatus covered by the scope of this standard. 不同類別家用及電動(dòng)工具設(shè)備 ? Category I ? Category I apparatus is deemed to fulfil the relevant immunity requirements without testing ? Category II ? Category II apparatus shall fulfil the following requirements: ? – electrostatic discharge with performance criterion B ()。 ? – fast transients with performance criterion B ()。 ? – injected currents up to 230 MHz with performance criterion A ()。 ? – surges with performance criterion B ()。 ? – voltage dips and interruptions with performance criterion C (). ? Category III ? Category Ill apparatus shall fulfil the following requirements: ? – electrostatic discharge with performance criterion B ()。 ? – fast transients with performance criterion B ()。 ? – injected currents up to 230 MHz with performance criterion A (). ? Category IV ? Category IV apparatus shall fulfil the following requirements: ? – electrostatic discharge with performance criterion B ()。 ? – fast transients with performance criterion B ()。 ? – injected currents up to 80 MHz with performance criterion A ()。 ? – radiofrequency EM fields with performance criterion A ()。 ? – surges with performance criterion B ()。 ? – voltage dips and interruptions with performance criterion C ().
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