Isolation transformer primary/secondary?
- Thread starter whoaru99
- Start date
BinaryMike
Pelagic EE
It's normal for isolation transformers to measure high on the secondary with light loading. I see no major problem with swapping the windings if you want some step-down, but it will step down more than you expect when the load is added. It is conceivable that specified breakdown voltage to the core will be impaired when the xfmr is used this way, but I have no supporting evidence.
whoaru99
Epic Member
FWIW, did a bit more playing today.
With solid connections established, I applied 1430W load (per Kill-A-Watt) to the red leads with black leads connected as primary to the AC mains. With this load the secondary voltage was a shade over 1V higher than the primary voltage.
Unloaded, the secondary (red leads) run ~4V higher than the supply voltage on the black leads.
With solid connections established, I applied 1430W load (per Kill-A-Watt) to the red leads with black leads connected as primary to the AC mains. With this load the secondary voltage was a shade over 1V higher than the primary voltage.
Unloaded, the secondary (red leads) run ~4V higher than the supply voltage on the black leads.
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