author：Rittal cabinet, rittal cooling
key word：Rittal cabinet, rittal cooling, rittal busbar, rittal fan, rittal electric cabinet
Rated current of E-Cu bus (DIN43671)
key word：Rittal cabinet, rittal cooling, rittal busbar, rittal fan, rittal electric cabinet
Rated current of E-Cu bus (DIN43671)
The continuous current of bus is specified in DIN43671 when the ambient temperature is 35 ° C and the average bus temperature is 65 ° C. With the help of a correction factor (k2), according to the deviation of the operating temperature
The continuous current given in the next table is corrected.
For the safe operation of equipment with thermal reserve, the bus temperature must be limited to 85 ° C. The key is the minimum continuous temperature allowed by the components that directly touch the bus system (fuse holder, outgoing line, etc.). The ambient air temperature of bus and bus system shall not exceed 40 ° C, and the maximum recommended temperature is 35 ° C.
The heat dissipation rate applied by the continuous current value given in the table is 0.4. This is equivalent to copper oxide bus. The modern bus system installed in the cabinet with protection grade of IP54 or higher can rittal busbar
Adopt more favorable heat dissipation rate. Compared with the data given in DIN43671, the higher heat dissipation rate can not be limited by the specified air temperature and bus temperature, and make the continuous current increase additionally. Experience shows that compared with the data in the table, the continuous current of bare copper busbar with a surface oxidation rate of 60% will increase by 6% to 10 % rittal busbar.
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