Shenhai e fakamoʻoni fakaʻauha
ʻOku ʻi ai ha faʻahinga fakamoʻoni ʻo e ngaahi meʻa ʻoku ne fakamoʻoniʻi ʻa e fakaʻauha, which distinguishes the product’s type of explosion-proof design and applicable scenarios. Hange ko ʻeni, ʻOku fakamatalaʻi fakaikiiki atu ʻi lalo ʻa e faʻahinga fakamoʻoni ʻo e exd IIB T4.
ʻEke: Fakaʻilonga ʻo e fakamoʻoni fakaʻauha.
d: The type of explosion-proof is flameproof. ʻOku ʻi ai foki mo ha ngaahi faʻahinga maluʻi ia, ib; tupulaki e malú type e; oil-filled type o; sand-filled type q; encapsulated type m; and composite type (commonly used in explosion-proof distribution boxes).
II: Refers to the second category of meʻangaue fakaʻuhila ki he fakaʻauha. This category is suitable for fakafepakiʻi gas environments other than coal mines (Kalasi ʻoku ou). There’s also Class III: Electrical equipment for explosive dust environments outside of coal mines. Class IIIA: Combustible fibers; Class IIIB: Efu ʻoku ʻikai conductive; Kalasi III: Conductive efu.
B: Class IIB gas. There are also IIC and IIA. IIC is the highest level, applicable to IIA and IIB. IIB is suitable for IIA, but lower levels cannot use higher ones.
T4: Ko e mafana ʻo e ʻea class is T4, with the equipment’s surface maximum temperature below 135°C.