Switchgear temperature rise 1

[golfoman]

Anyone any guidance on how to keep the temperature rise of an LV (400V) Switchgear cubicle below 60K (ambient 35 deg) for UK use. I need to know how to calculate current carrying capacity of copper and ensure that the cubicle has sufficient venting to keep temp down. Any advice would be well appreciated.

 

[alehman]

As for ventilation, this would be very difficult to calculate with an analytical approach. I assume you are speaking of conductor (not air) temperature rise? I think examination of other switchgear designs that are known to provide adequate cooling will provide a good starting point.

Also you might try one of these.

http://www.copper.org/applications/busbar/ampacity/busT1.htm

http://www.stormcopper.com/design/ampacity.htm

 

[cuky2000]

QUESTION: Anyone any guidance on how to keep the temperature rise of an LV (400V) Switchgear cubicle below 60K (ambient 35 deg) for UK use.

ANSWER: One way is monitoring the temperature providing alarm or switch to start the cooling system.

Check if the enclose monitoring device could work for you.

http://www.squared.com/us/services_...36E44/$file/WirelessTemperatureMonitoring.pdf

QUESTION: I need to know how to calculate current carrying capacity of copper and .......
ANSWER: For temperature rise calculation guidance, see standard DIN EN 60439-1 or other relevant standards. There is good information in section 4.4 of the ABB Switchgear Manual 10th edition.