Shenxay portlashdan himoyalangan
CT4 va CT6 operatsion sirt haroratini ko'rsatadi, haroratga chidamli emas, portlashdan himoyalangan mahsulotlar uchun. T6 toifasi ostida tasniflangan mahsulotlar T4 toifasiga nisbatan pastroq ishlaydigan sirt harorati tufayli yuqori xavfsizlikni ta'minlaydi..
| Elektr jihozlarining harorat guruhi | Elektr jihozlarining maksimal ruxsat etilgan sirt harorati (℃) | Gaz/bugʻning yonish harorati (℃) | Qurilmaning tegishli harorat darajalari |
|---|---|---|---|
| T1 | 450 | ＞450 | T1 ~ T6 |
| T2 | 300 | ＞300 | T2 ~ T6 |
| T3 | 200 | ＞200 | T3 ~ T6 |
| T4 | 135 | ＞135 | T4 ~ T6 |
| T5 | 100 | ＞100 | T5 ~ T6 |
| T6 | 85 | ＞85 | T6 |
CT4 portlashdan himoyalangan vosita Exd IIC T4 reytingiga ega va odatda atrof-muhit harorati taxminan 135 ℃ bo'lgan muhitda qo'llaniladi..