Protection of the Neutral Conductor
Protection of the neutral conductor in three (3) phase systems needs to be given importance during design, particularly on reduced neutral conductor size and when the presence of harmonics is …
IEC 60076-5 Transformer Impedances
The impedance of a power transformer has a direct impact on the total cost of the power system. Cost of power transformer, protective devices, etc will be affected. Electrical Engineers …
Engineering Standards – Do We Need to Comply With Them?
The project that I previously worked with was in its final stages of detailed design when a lot of discussions were undertaken on how to get along with construction people …
IEC Motor Protection Coordination
IEC 60947-4-1 addresses coordination between the motor circuit protective devices and the motor starters. It also provides a method to measure performance of these devices if a short-circuit occurs. This …
Arc Flash – Hazard and System Grounding
IEEE 1584 Guide Equation for calculation of incident energy has a factor K2 for system grounding. The value of K2 is Ungrounded and high or low resistance grounded systems = …