Explosion-proof rating:
Explosion-proof equipment with a CT4 rating is classified as Exd IIC T4. BT4 explosion-proof equipment is rated as Exd IIB T4, which is a lower explosion-proof rating than CT4 equipment.
Tillståndskategori | Gasklassificering | Representativa gaser | Minsta tändgnistaenergi |
---|---|---|---|
Under Gruvan | jag | Metan | 0.280mJ |
Fabriker utanför gruvan | IIA | Propan | 0.180mJ |
IIB | Eten | 0.060mJ | |
IIC | Väte | 0.019mJ |
Applicability:
CT has the widest range of applicability.
Gas environment:
CT is an explosion-proof rating for acetylene and väte levels. If there are gases like acetylene or hydrogen in the environment, CT-rated explosion-proof equipment is required. BT-rated equipment is not suitable for acetylene environments and is only considered a moderate explosionssäker nivå.