What is the concept of T1~T6 temperature among explosion-proof levels? This is a point of knowledge for those who need to select explosion proof pressure transducer or want to understand this knowledge. The next Guangdong Kaidi Energy Technology Co., Ltd. to introduce you to this knowledge point!

Explosion-proof electrical equipment, like ordinary electrical equipment, will cause temperature rise in normal operation as well as possible hazardous conditions. Since the explosion-proof electrical equipment around the possible presence of dangerous gas mixtures will inevitably come into contact with these high-temperature surfaces, when the surface temperature of the equipment is higher than the self-ignition temperature of combustible gas mixtures, it can cause dangerous things. Therefore, we must ensure that the extreme high surface temperature of the equipment is lower than the ignition temperature of the hazardous gases that may be present in the environment around the equipment.

In the standard GB3836, the temperature group is divided into six levels, which are T6=85℃, T5=100℃, T4=135℃, T3=200℃, T2=300℃, T1=450℃. Obviously, T6 is the extreme high level. The standard indicates that the T6 level of explosion-proof equipment will not have a surface temperature higher than 85°C when used under its specified conditions of use, which means that it can be safely used in flammable and explosive environments where the ignition temperature is higher than 85°C. The higher the temperature group, it also means that the equipment can adapt to the more severe flammable and explosive environment.

In general, the limit of high surface temperature for the electrical equipment itself plus the limit of high use of the ambient temperature, that is: the limit of high surface temperature of equipment = measured limit of high surface temperature a measured ambient temperature + the limit of high ambient temperature.

However, for process automation instrumentation, when the media temperature involved is higher than the product limit high ambient temperature, the possibility of the influence of the media temperature on the product temperature group should also be considered when designing the product.

For example, assuming that the ambient temperature of the equipment is 60°C, the temperature rise of the equipment is 10°C measured at room temperature, and the actual media temperature of the product is 500°C. At this time, the media temperature is much higher than the temperature group temperature. In this case, if the need for explosion-proof certification, without changing the ambient temperature of the equipment, the media temperature must be reduced to meet the requirements of the temperature group, because the media temperature plays a decisive role in this case. The following is a table of the relationship between the specific temperature group, ambient temperature, and allowable media temperature:

It can be seen that when the medium temperature is higher than the product ambient temperature, the requirements: equipment limit high surface temperature = measured limit high surface temperature a measured when the ambient temperature + medium temperature.

The above is about the explosion proof flow meter of the T1 ~ T6 temperature concept is what? The introduction of this point of knowledge, if there are other insights or do not understand the place can be left in the comments section to discuss Oh!