Insulation Class and Temperature Rise
The selection of induction motors designed to match the load requirements of any particular application need to ensure that the temperature inside the motor windings does not rise to a …
Arc-flash Hazard Protection – IEC Standard
IEEE has dedicated standards in Arc-flash hazard mitigation and protection (IEEE 1584 & NFPA 70E) while IEC has integrated its arc-flash protection into the IEC 62271-200, High-voltage switchgear and controlgear …
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 …
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 …
IEEE / IEC Oil-immersed Transformers – Methods of Cooling
Oil-immersed transformer cooling methods are consistent in both the IEC and IEEE. This designation is one of the few that is the same for both standards. Oil-immersed transformer cooling method …