防爆等級Exd II BT4係咩意思

防爆產品均具有防爆等級, which distinguishes the product’s type of explosion-proof design and applicable scenarios. 例如, 防爆等級Exd IIB T4詳細說明如下.

前任: 防爆標誌.

d: The type of explosion-proof is 隔爆. 仲有本質安全類型ia, IB; 提高安全性 type e; oil-filled type o; sand-filled type q; encapsulated type m; and composite type (commonly used in explosion-proof distribution boxes).

第二: Refers to the second category of 防爆電氣設備. This category is suitable for 爆炸物 gas environments other than coal mines (I類). There’s also Class III: Electrical equipment for explosive dust environments outside of coal mines. Class IIIA: Combustible fibers; Class IIIB: 非導電粉塵; III類: 導電粉塵.

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: 這 溫度 class is T4, with the equipment’s surface maximum temperature below 135°C.