Dust explosion-proof electric hoists are classified into three explosion-proof grades: IIA, IIB, and IIC. They are suitable for environments where combustible gases or vapors mix with air, categorized into temperature groups T1 to T4.
| Kullanım Alanı | Gaz Sınıflandırması | Temsili Gaz | Minimum Ateşleme Kıvılcım Enerjisi |
|---|---|---|---|
| Madenin Altında | I | Metan | 0,280 mJ |
| Maden Dışındaki Fabrikalar | IIA | Propan | 0,180 mJ |
| IIB | Etilen | 0,060 mJ | |
| IIC | Hidrojen | 0,019 mJ |
These electric hoists are further divided into Class B and Class C types, typically utilized in Zones 1 and 2. The applicable temperature range for these hoists spans from T1 to T6, with T6 being the safest in terms of explosion-proof safety.
