Power Supplies

Power supplies DIY and power quality measurements. Variac, transformers and server PSU.

3 Phase 13A Lübcke Variac

3 Phase 13A Lübcke Variac
Published: April 5, 2016. Updated May 7, 2022. Introduction On a junk yard I found a badly damaged enclosure containing a 3 phase 13 A Lübcke variac, 10 kVA isolation transformer and 6 large stud...

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Merlin Gerin PM700 power meter

Merlin Gerin PM700 power meter
Introduction I wanted a small unit to plug into, or between two, mains feed cables to measure voltage, RMS current, power factor and harmonic distortion. I found this Merlin Gerin PM700 power meter at a...

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3 Phase 400 VAC 6 A Variac

3 Phase 400 VAC 6 A Variac
Introduction I bought this 6 A variac stack as advertised for 6A. But the physical size suggests it could be a 10A model as well. There is no part numbers or data shields to go...

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