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Old 16th Sep 2018, 9:47 pm   #35
Phil G4SPZ
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Join Date: Apr 2005
Location: Bewdley, Worcestershire, UK.
Posts: 4,735
Default Re: Lamp limiter plus Variac tip

Al, just thinking aloud now... my own isolating transformer doesn't have a centre-tapped secondary, but by the same thinking, I should be able to plug in a conventional RCD safety plug into the transformer's output to add the trip facility, shouldn't I? The RCD is current-operated and it senses the difference between the currents through its two active conductors, irrespective of whether the leakage current flows to earth or to anywhere else. It's the imbalance that is detected.
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