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Temperature correction for transformer load loss

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molino

Electrical
Joined
Jul 25, 2003
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1
Location
US
How temperature impacts the load loss of a distribution transformer?
 
load losses come from 3 places:
1. resistive losses in the windings
2. eddy current losses in the windings
3. eddy current losses in the tank

temperature would affect #1 in that the resistance of the windings increases as the temperature increases (copper & aluminum have a positive temperature coefficients for resistivity). as the resistacne goes up so do the losses.
 
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