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Step 5Figure out the Transformer Secondary Phase
One connection will add (produce higher voltage) and one connection will subtract (produce lower voltage). We want to determine which is that latter connection.
This process is described in detail at the GEOFEX site mentioned earlier, but basically:
If the measured voltage is less than than the primary voltage, you're done this step.
If this measured voltage is more than than the primary voltage move the hot connection to the other end of the secondary.
This process is described in detail at the GEOFEX site mentioned earlier, but basically:
- Connect the Hot (black) side of the primary to either end of the secondary.
- Plug in your partially assembled VVA. Measure the voltage across the primary, e.g., 125 VAC.
- Measure the voltage from Neutral (white) to the other (unconnected) end of the secondary.
If the measured voltage is less than than the primary voltage, you're done this step.
If this measured voltage is more than than the primary voltage move the hot connection to the other end of the secondary.
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