深海防爆
防爆電気機器は最高表面温度により6種類に分類されます。: T1, T2, T3, T4, T5, そしてT6. これらのカテゴリは、可燃性ガスの発火温度グループと一致しています。.
| 温度レベル IEC/EN/GB 3836 | 装置の最高表面温度 T [℃] | 可燃性物質の発火温度 [℃] |
|---|---|---|
| T1 | 450 | T＞450 |
| T2 | 300 | 450≧T＞300 |
| T3 | 200 | 300≧T＞200 |
| T4 | 135 | 200≧T＞135 |
| T5 | 100 | 135≧T＞100 |
| T6 | 85 | 100≧T＞8 |
The term ‘maximum surface temperature’ denotes the highest temperature that can be reached on the surface or parts of the explosion-proof electrical equipment under both normal and the most adverse conditions deemed acceptable, with the potential to ignite surrounding explosive gas mixtures.
The guiding principle for temperature classification in explosion-proof electrical devices is as follows:
The peak surface 温度 generated by the device must not be capable of igniting adjacent combustible gases, and it should not exceed the ignition temperature of these gases. For safety ratings, T6 devices rank the highest, while T1 devices are at the lower end.
This demonstrates that for 爆発物 materials with identical temperatures, it reflects the lower boundary of their ignition temperatures. 逆に, のために 防爆電気機器, it denotes the upper limit of their maximum surface temperatures, showcasing a clear distinction in characteristics.
Given that explosion-proof electrical equipment utilized in explosive dust environments clearly states the device’s maximum surface temperature, の “Electrical Equipment Design Code for Explosive Hazard Environments” no longer divides explosion-proof electrical equipment into temperature groups.