Don’t Get Giddy, Be Firm!
I pity the engineers who use data in their design without prior verification. In simple terms, they do not know what they are doing. Secondly, if someone will ask them …
As An Engineer, Do You Trust Your Vendors?
It is difficult to comprehend but gone are the days when Engineers perform their design calculations prior to asking vendor quotations. Several decades ago, when computers are only for the …
Time-Current Curves Using Excel 2013
This tutorial serves a guide for the creation of time-current curves using Excel 2013. The user is expected to have at least an intermediate level of knowledge in the usage …
Insulation Coordination – Why is it required?
What is insulation coordination and what is its importance? There are many definitions of insulation coordination provided by different authorities. In this instance we wanted to use IEC 60071-1 definition …
Comparison of IEC and ANSI Terminology
When performing designs where mixed standards are used, there will be lots of confusions along the process. These confusions will one way or another affect the result of the project …
Rotating-machine Reactance Multipliers
The momentary or first cycle current is used to evaluate the closing or latching of the high voltage circuit breaker. Other selection criteria are the interrupting and symmetrical short circuit …