Philippine Electrical Code Common Violations – Conductor Box Fill
This is a series of articles where we shall be discussion the common violation on the Philippine Electrical Code. It is the assumption of this series of article that the …
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 …
High Voltage Arc Flash Assessment and Applications Part 2
Part 1 of this article, which was the cover story in the previous issue of NETA World, explored the need for high-voltage arc flash (HVAF) assessment to protect utility workers …
High Voltage Arc Flash Assessment and Applications
Arc flash assessment based on IEEE 1584 has limitations with respect to the voltage. The voltage range applicable to IEEE 1584-2018 remains unchanged at 208V through 15kV. Low voltage range …
Protection Coordination in Electrical Substation – A Case Study
Protection coordination is the heart of all power systems. To ensure a quality and reliable operation of the power systems, an electrical fault must be cleared within a short time. …
Recommended Protection Relay Grading Interval
Typical Protection Relay Timing Errors Protection relay grading intervals are critical in ensuring selective coordination in power systems. The recommended protection relay grading intervals typically depend on the type of …