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 …
IEC 61439 – Relationship between peak current and short-time current
Short-circuit withstand ratings of a switchboard or motor control centre is a measure of its ability to withstand the dynamic and thermal stresses when a fault occurs within or near …
Greenhills Gas Explosion
A gas explosion hit a seafood restaurant in Greenhills, San Juan killing several people and destroying properties. This is the second gas explosion that occurred in Metro Manila in less …
Normative and Informative Annexes Compliance
The terms ‘normative’ and ‘informative’ are commonly used in IEC and other derivative standards to define applications of annexes. A normative annex is an integral part of a Standard which …
Low Harmonic and RFI Solutions, High Power and Medium Voltage Motor Control
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 is one of the few …
Serendra Explosion – Time to Implement Better Government Regulations
Whatever the result of the forensic investigation of the Serendra explosion, this incident should become an eye-opener for the Philippine government to implement stricter rules on gas installations may it …