Classification of hazardous areas for motors
The classification of hazardous areas for motors is as follows:
Region | Regional definition | Applicable explosion-proof motors |
Zone 0 | Environments with continuous or long-term exposure to explosive gases | Currently, there are no suitable explosion-proof motors available |
Zone 1 | Environments where explosive gases may occur | Explosion proof type d, positive pressure type P |
Zone 2 | An environment where explosive gases are unlikely to occur under normal circumstances, and even if they do, they will only occur for a short period of time | Explosion proof type d, positive pressure type P, increased safety type e, non spark type nA |
Zone 20 | Environments with continuous or long-term exposure to explosive dust | Currently, there are no suitable explosion-proof motors available |
Zone 21 | Environments where explosive dust may occur | Shell protection type tD |
Zone 22 | Explosive dust environments are unlikely to occur under normal circumstances, and even if they do, they will only occur for a short period of time | Shell protection type tD |