Newly UL- and Semko-approved is the dc and ac single line Feedthru filters from Spectrum Control Inc. (www.spectrumcontrol.com). Rated at 10-300A and intended for 0-400 Hz applications, these filters have C and Pi configurations with the dc models coming with Class Y4 capacitors while the ac models offer Class Y2 or Class Y4 capacitors. In addition, the bolt-in style with D-shaped bushing make installation easy.
Fifty-six-year-old Pasquale Russo has been doing metalwork for more than 30 years in a tiny southern Italy village. Many craftsmen like him brought with them fabrication skills when they came from the Old World to America.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.