Substation busbars eddies. Bar vs. C-channel
QuickField simulation example
Effect of power frequency and skin effect on current carrying rods, pipes and channel.
Problem Type
Plane-parallel problem of AC Magnetics.
Geometry
Given
Material of busbar - aluminum with electrical conductivity σ = 30.1 MS/m
Frequency f = 0 Hz, 60 Hz.
Task
Calculate busbar DC resistance and impedance at 60 Hz.
Results
| Busbar | Cross-section area, in² | Resistance, μOhm/m | Impedance, μOhm/m |
|---|---|---|---|
| Bar 6" ⨯ 0.5" | 3 | 17.2 | 182 |
| C-channel 6" w ⨯ 2.5" d | 2.4 | 21.3 | 156 |
Current density distribution in a Bar at 0 Hz and 60 Hz:
Current density distribution in a C-channel at 0 Hz and 60 Hz:
- Video: Effect of power frequency and skin effect on current carrying rods, pipes and channel
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