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 …
Effect of Air Density on Equipment Physical Size
IEEE C57.13 Clause 4.2 states that the dielectric strength of air decreases as altitude decreases. The dielectric strength on air should be multiplied by the altitude correction factor provided in …
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 …
Earth-fault Factor – Importance in Equipment Selection
Power frequency withstand is one of the criteria in the selection of electrical equipment rating. The selection of the appropriate power-frequency withstand level is related to the earth fault factor …
Compliance to NEC Standards and Requirements is not Compliance to NFPA 70E
Some employers assume that compliance to the standards and requirements of the National Electrical Code is as good as compliance to the NFPA 70E since both published by NFPA. It …