Calculation of Maximum and Minimum Short-circuit Currents
The calculation of maximum and minimum short-circuit currents as per IEC 60909 is based on the following assumptions. No change in the type of short circuit involved, that is, a …
Why The PEC Needs to Adapt IEC
The first edition of the PEC published in 1962 by PAMEE was an adaptation of the NEC customized to suit local Philippine environment. Several decades later and the PEC is …
Cool and Efficient White LED Problem – Droop
Tech visionaries have promised us a bright new world where cool and efficient white LEDs, based on blue ones, will replace the wasteful little heaters known as incandescent light bulbs. …
Importance and Usage of Short-circuit Current Calculations
Why do Electrical Engineers need to do short-circuit or fault calculations? The answers are simple. First, to determine the rating of the electrical equipment to withstand thermal and electromagnetic effects …
Sign-off on a Marked-up Document
A coal seam gas project was conceptualized as a result of a proposed expansion of a longwall coal mining operation. Initally, there was a single option. Then the client changed …
It has Always been this Way
In one of the meetings I recently attended, the safety moment was about circumventing company policies just to get the job done. This is a dangerous attitude. It does not …