author：Rittal cabinet, rittal cooling
key word：Rittal cabinet, rittal cooling, rittal busbar, rittal fan, rittal electric cabinet
Calculation example:
Calculate 16mm2 PVC connected to a D02-E18 fuse element (SV3418.010)
The maximum allowable conduction current of insulated H07 connecting wire is subject to the following conditions:
Environment and laying conditions
◾ The conductor is laid in the cable tray, with six current loops
◾ Ambient temperature in cabinet 35 ° C
◾ Direct ambient temperature of conductor in cable tray 50 ° C
Conclusion:
Under the above environmental conditions, the load of the connecting wire of fuse components can only reach 41.9A at most.
Due to other influencing factors, such as the side-by-side of components, poor convection conditions in the structure, etc
The value may fall further.
Use semiconductor fuse in Rittal NH fuse switch/NH bar fuse switch and busbar fuse holder
The overload protection and short circuit protection of semiconductor components put forward high requirements for fuse.
Because semiconductor components have very low thermal capacity, aR, gR or gRL type semiconductor insurance
The closing integral value (I2t value) of the fuse must be the same as the limit value of the semiconductor element to be protected
Match. The fuse of the fuse must be disconnected very quickly, and the overvoltage (open
Off voltage or arc voltage) must be as small as possible. With cable, line and transformer protection
Compared with fuse, the characteristics of semiconductor fuse lead to relatively high heat dissipation Consumption.
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Rittal cabinet, rittal cooling, rittal busbar, rittal fan, rittal electric cabinet
Quick navigation
Rittal cabinet, rittal cooling, rittal busbar, rittal fan, rittal electric cabinet
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