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