testing - leakage inductance on three winding transformer ... have a toroidal 3 winding transformer. It's a step up, lets say 1:10 ratio, the secondaries are identical. If I measure the leakage inductance, shorting 1 secondary at a time, I get about the same leakage for both secondaries. If I short both, I get about 10% smaller than the individual leakage.
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