【正文】 RCUIT earthed SELV CIRCUIT – earthed conductive part – unearthed SELV CIRCUIT – unearthed TNV1 CIRCUIT – earthed TNV1 CIRCUIT ELV CIRCUIT or basic insulated conductive part – earthed conductive part – earthed SELV CIRCUIT – basic insulated conductive part – ELV CIRCUIT Earthed hazardous voltage secondary circuit Earthed hazardous voltage secondary circuit TNV1 CIRCUIT TNV1 CIRCUIT TNV2 CIRCUIT TNV2 CIRCUIT TNV3 CIRCUIT TNV3 CIRCUIT IEC 609501:2023介紹 2023/3/12 37 基本絕緣型 PRIMARY CIRCUIT – earthed or unearthed HAZARDOUS VOLTAGE SECONDARY CIRCUIT – earthed conductive part – earthed SELV CIRCUIT – basicinsulated conductive part – ELV CIRCUIT Earthed or unearthed hazardous voltage secondary circuit – unearthed HAZARDOUS VOLTAGE SECONDARY CIRCUIT – earthed conductive part – earthed SELV CIRCUIT – basicinsulated conductive part – ELV CIRCUIT unearthed SELV CIRCUIT or doubleinsulated conductive part – unearthed TNV1 CIRCUIT – TNV2 CIRCUIT – TNV3 CIRCUIT earthed SELV CIRCUIT – TNV2 CIRCUIT – TNV3 CIRCUIT TNV2 CIRCUIT – unearthed TNV1 CIRCUIT – earthed TNV1 CIRCUIT – TNV3 CIRCUIT TNV3 CIRCUIT – unearthed TNV1 CIRCUIT – earthed TNV1 CIRCUIT IEC 609501:2023介紹 2023/3/12 38 補(bǔ)充絕緣型 basicinsulated conductive part or ELV CIRCUIT – doubleinsulated conductive part – unearthed SELV CIRCUIT TNV CIRCUIT – basicinsulated conductive part – ELV CIRCUIT 補(bǔ)充絕緣 / 加強(qiáng)絕緣型 unearthed hazardous voltage secondary circuit – double insulated conductive part – unearthed SELV CIRCUIT – TNV CIRCUIT 加強(qiáng)絕緣型 PRIMARY CIRCUIT – doubleinsulated conductive part – unearthed SELV CIRCUIT – TNV CIRCUIT earthed HAZARDOUS VOLTAGE SECONDARY CIRCUIT – doubleinsulated conductive part – unearthed SELV CIRCUIT – TNV CIRCUIT IEC609501:2023介紹 2023/3/12 39 空間距離 (clearance)的決定： 已知工作電壓及絕緣等級(jí)後，即可決定空間距離。 此要求只針對(duì)地板式設(shè)備的外殼或桌上型設(shè)備的外殼之非垂直上方表面 (nonvertical top surface) － 危險(xiǎn)電壓零件與外殼接地可觸及的導(dǎo)體零件間的空氣間距離，須至少 ____mm。最小的空氣間距離，須從等於 AC主電源值的欄位取得，如.， 則 。 決定是否符合要求前，內(nèi)部零件應(yīng)先施於 ____ N力，外殼施以____ N力，以減少其距離，使確認(rèn)在最糟情況下，空間距離仍符合規(guī)定。 － 加強(qiáng)絕緣的沿面距離是表 2L規(guī)定的基本絕緣限值的兩倍。 － 針對(duì)玻璃，雲(yún)母或類似的材質(zhì)，可允許使用最小的沿面距離限值，等於空氣間距離限值。 － 若不知 TNV電路的工作電壓，則假設(shè) TNV1電路是.， 而 TNV2及 TNV3電路是 .。 IEC/EN 609501:2023介紹 600 400 175 100 600 400 175 2023/3/12 46 4. 12 常見範(fàn)例 : F I GU RE A , T WO I NS UL A T I ON SY ST E M I N SER I ES BE T WEE N MA I NS PR I MA RY CIRCU I T S A ND US ER A C CE SS I BL E CI RC UIT S AC 2 30 VUs er acc es s ib l eci rcu it 基本絕緣 補(bǔ)充絕緣IEC 609501:2023介紹 2023/3/12 47 F IGURE B , P CB LA Y O UT O F A C LA S S I S W ITCHI NG P O W E R S UP P LY P CB Pr i m aryG ro u ndSec ondaryLNPEba si c i ns ul a t i o ndou bl e or r e i n f or c ed i ns ul at i onIEC/EN 609501:2023介紹 2023/3/12 48 F IGURE C , O NE I NS ULA TIO N S Y S TE M A ND S HI E LDING CO NNE CTE D TO PE BE TW E E N M A IN S P RI M A R Y C IR CUI TS A ND US E R A CCE S S IB LE C IR C UI TS AC 2 3 0VUs e r a c c e s s i b l ec i r c u i t 基本絕緣IEC/EN 609501:2023介紹 2023/3/12 49 F IGURE D, W O RKI NG V O LT A G E H IGH E R THA N M A IN S V O LT A G E P CB Pr i m aryG ro u ndSec ondaryLNPEba si c i ns ul a t i o ndou bl e or r e i n f or c ed i ns ul at i onIEC/EN 609501:2023介紹 2023/3/12 50 F IGURE E , S HI E LDING O F S E CO NDA RY C IR CUI T W ITH G ND TRA CE P CB P r i m a r yG r o u n dS e c o n d a r yLNPEb a s i c in s u l a t i o nXIEC/EN 609501:2023介紹 2023/3/12 51 F IGURE F, S LO T IN S ID E THE P CB BE TW E E N P RI M A RY A ND S E CO NDA RY P CB Pr i m aryG ro u ndSec ondaryLNPEba si c i ns ul a t i o ndou bl e or r e i n f or c ed i ns ul at i onIEC/EN 609501:2023介紹 2023/3/12 52 IEC/EN 609501:2023介紹 2023/3/12 53 IEC/EN 609501:2023介紹 2023/3/12 54 IEC/EN 609501:2023介紹 2023/3/12 55 絕緣厚度的決定 (clause ) 絕緣厚度應(yīng)依工作電壓及絕緣等級(jí)及下述之情形決定之()。 ─ 多層印刷電路板的內(nèi)層，其在同層相鄰的兩導(dǎo)體間(two tracks) ， 可視為絕緣厚度，須符合 。 ─