Power System Overvoltages and Insulation Coordination – Part 1
Note: This is the first part of power system voltages and insulation coordination. Insulation coordination is dealt with for three phase AC systems with nominal voltages Un > 1kV in …
Compliance to Statutory Laws
I was reminded of this article which I have written about many years ago when I attended some product presentations about variable speed drives. What catch my attention most was …
Compliance to Standards and Statutory Laws
What is a Statutory Law? What do NFPA 70, BS 7671 and AS/NZS 3000 have in common? The former is National Electrical Code (U.S.), the next is the wing regulation …
Philippine Electrical Code – Acceptable Practice
Electrical Engineers – Do you really care? Electrical installation of this kind is all over Metro Manila and probable in some other major cities in the Philippines. Are these building …
Spaces About Electrical Equipment – Working Spaces
Spaces About Electrical Equipment One of the most taken for granted provision of the Philippine Electrical Code is Section 1.10.2.1 Spaces About Electrical Equipment. It may have been that Electrical …
IEEE Transformers Categories
There are four (4) categories of transformers according to IEEE Std. C57.12.00 – IEEE Standard for General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers. Categories of Transformer Rating Category …