Shenhai Kuphulika-Umboni
Zida zamagetsi zomwe sizingaphulike zimagawidwa m'magulu asanu ndi limodzi kutengera kutentha kwawo kwakukulu: T1, T2, T3, T4, T5, ndi t6. Maguluwa amagwirizana ndi magulu a kutentha kwa mpweya woyaka.
| Kutentha kwa mlingo IEC/EN/GB 3836 | Kutentha kwapamwamba kwambiri kwa zida za T [℃] | Kutentha kwa Lgnition kwa zinthu zoyaka [℃] |
|---|---|---|
| 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 kutentha 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 zophulika materials with identical temperatures, it reflects the lower boundary of their ignition temperatures. Mosiyana, za zida zamagetsi zosaphulika, 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, ndi “Electrical Equipment Design Code for Explosive Hazard Environments” no longer divides explosion-proof electrical equipment into temperature groups.