1. Yuav tsum muaj lub cim hauv av meej ntawm qhov chaw tiv thaiv av.
2. Cov cuab yeej siv hauv av txuas nrog cov hlau txuas ntxiv, cov hlau tsis muaj dej noo thaiv txheej, thiab txheej armor nyob rau hauv cov khoom siv kho qhov muag, thiab qhov chaw hla ntawm cov xaim hauv av yuav tsum tsis pub tsawg dua 6mm2.
3. Voltage withstand level: Qhov voltage withstand nruab nrab ntawm lub grounding device thiab lub thawv thiab thav duab yuav tsum tsis txhob tsawg tshaj li 3000V (DC), thiab yuav tsum tsis muaj kev puas tsuaj los yog arcing rau 1 feeb.
4. Rwb thaiv tsev tsis kam: Lub rwb thaiv tsev tiv thaiv ntawm cov khoom siv hauv av thiab cov hlau ua haujlwm ntawm lub thawv yuav tsum tsis pub tsawg dua 2 × 104M Ω, qhov ntsuas hluav taws xob yog DC 500V.