Issues regarding the heat generation power of explosion-proof power enclosures
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I’m thinking about placing a 20A 24V power supply inside an explosion-proof box with dimensions of 500*400*200. I’m not sure if that’s possible, and I wonder whether the heat generated by the power supply can be dissipated properly. The experienced microcontroller instructor upstairs mentioned that the power supply generates a significant amount of heat, around 20% approximately. That’s equivalent to having a 100W heating element inside. If that’s not possible, the power supply has to be placed in the electrical room; from there, 4*2.5 mm² cables are used to deliver 24V DC power to the power distribution box. From this box, the power is divided into multiple 24V circuits using terminal blocks, so that instruments such as the mass flow meters in the workshop can be powered independently.
Thank you for sharing, and thank you for your efforts
Installing a 20A 24V power supply inside an explosion-proof box may pose cooling issues, as its heat generation capacity is around 100W. It is recommended to place the power supply in the electrical room, and use 4*2.5 cables to deliver 24V DC power to the work area, in order to ensure safety and the stable operation of the equipment. .
Both Wittur and Siemens provide tools for calculating temperature rise and heat dissipation