Phenix Technologies 640-0.4P Portable AC Dielectric Test Set 40kVAC 10 mA. Phenix offers the premier line of portable AC Dielectric Test Sets with ratings from 15 to 200 kVAC which are suited for testing a wide range of electrical equipment. These units are lightweight and ruggedly constructed for field use. Each unit provides easy to read digital instrumentation and clean efficient controls.