PEC, NEC and IEC Comparison of Cable sizes
Administrative Order of 1987 The Philippine Electrical Code (PEC) is based on the National Electrical Code (NFPA 70) with a major update on changing the Imperial Units to Metric Units …
Key Differences in Power Transformer Selection According to International Standards
Power transformer sizing standards according to IEEE (Institute of Electrical and Electronics Engineers) and IEC (International Electrotechnical Commission) differ in certain key aspects. Here’s a breakdown of the major differences …
IEC Current Transformer Accuracy Class
Current transformer (CT) accuracy class refers to how precisely a current transformer can replicate the primary current in its secondary winding, within certain tolerances, under defined conditions. CT accuracy is …
Cooling Methods of Power Transformers and Reference Standards
I. General Transformers generate heat during operation, primarily due to the electrical losses in the windings and the core. To maintain efficiency and prevent damage, various cooling methods are employed. …
Kelvin’s Law and Minimum Conductor Size
What is Kelvin’s Law? Kelvin’s Law, also known as Kelvin’s Minimum Conductor Size Law, is a principle in Electrical Engineering to determine the optimal size of electrical conductors electrical power …
Voltage Selection Guide for Electric Power Transmission Line as to Load and Distance
General As Electrical Engineers, there will be a time in our professional careers that we will be tasks to perform options selections in transmission lines. We should be able to …