Detailed Answer
Explosion-proof zone classification: Zone 0 (gas continuously present), Zone 1 (frequently present), Zone 2 (occasionally present); underground coal mines generally managed as Class I (gas mines). Remote control explosion-proof grade selection: use Class I intrinsic safety (Ex ib I) underground, use Class II (Ex ib IIB/IIA) for ground hazardous areas. Lideral and Xingjia explosion-proof models provide corresponding grades by zone.
| Zone 1 | Frequently present |
| Zone 2 | Occasionally present |
| Coal mine | Class I intrinsic safety |
Note:Perform hazard zone classification before selection to clarify Zone grade.