The issue of the explosion protection rating for electric motors.
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What is the difference between explosion protection ratings DIIBT4 and DIICT4? Are there motors in China that meet the DIICT6 explosion-proof rating?
This post was last edited by foam_ZPTK on 2019-8-12 at 10:19. There probably isn’t much difference for the CT6; the typical gases for the CT4 are hydrogen and acetylene
It’s mainly the difference between Class B and Class C explosion protection; Class C has higher requirements.
The T6 temperature class mainly includes media such as ethyl nitrate and ethyl nitrite, with ignition temperatures of 85°C and 90°C respectively. You can consult motor manufacturers in Nanyang, Jiamusi, and other places. The explosion protection class of the motor for carbon disulfide pumps is IICT5, and domestic motor manufacturers are capable of producing such motors.
I consulted Jiamusi, and it’s possible to achieve T5.
The difference lies in the environments in which they are used: Class C is for hydrogen-rich environments, while Class B is for general explosive gas environments. T1-T6 represent the ignition temperature of the substance, and data for these values is available.
The original poster, take a look at GB/T 3836.15
For temperature categories, grade C is higher than grade B; CT6 is available, and motor manufacturers with slightly larger capabilities can also produce it, such as Jiamusi, Nanyang Explosion-Proof, Nanyang Micro-Tech, and Jiangsu Dazhong
None of the above motor factories can do this. Only CT4 can be achieved; some manufacturers are able to produce CT5, but they lack the necessary certification. None of the manufacturers have produced the CT6; I’ve called their factories to inquire about it.