Why We Perform A VLF Test?
ATE has provided a very good reasons on this article why high voltage withstand tests on cables are necessary. Past practices involved HVDC Hi-pot or DC leakage current methods. They …
Inverter Topologies – Variable Speed Drives
Voltage-source inverter has a configuration where rate of change of voltage (dv/dt) in the inverter is limited by a large capacitor connected in parallel across the DC link. Current-source inverter …
Low Harmonic and RFI Solutions, High Power and Medium Voltage Motor Control
I still remember this seminar “Low Harmonic and RFI Solutions, High Power and Medium Voltage Motor Control” provided by Power Electronics for free and presented by Lalo Salvo. It is …
Concept Selection or FEED – The Distinction
The Concept Selection stage is not a FEED stage. Looking at the right perspective, Concept Selection is a precursor to FEED. The danger of not having the distinction of these …
Grounded or Grounding Conductors
The NEC and PEC define and identify grounded conductor and grounding conductor differently. To understand better, here are the definitions on these electrical codes: Definitions: Grounded Conductor. A system or …
PEC, NEC, IEC Grounded/Earthed Conductors
If you have been working with IEC standards or its derivative standards like the AS, it will be strange for you to learn that NEC and a derivative standard like …