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 = …
Lightning Damage to Services
In this article, I have listed the possible damage that lightning strike could impart into structures. In addition to this, lightning could likewise disrupt services. IEC 62305-1 provides a list …
Power Factor Correction and Power System Energy Efficiency
There are so many ways to increase power system energy efficiency. The use of energy-efficient motors, variable speed drives, or energy-efficient lighting is the method to increase power system efficiency. …
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 …
IEC 60909 vs ANSI/IEEE 141 Short-Circuit Current Calculations
Short-circuit calculation is one of the most important work to be undertaken in plant power distribution. A comprehensive, detailed and accurate short-circuit currents will be used in switchgear selection, protection …
Fault Sequence Network Connections
Important Note: Open circuit faults are presented in this article. Calculating three-phase faults is very straightforward. Unbalance faults, however, have a little bit of challenge in it as it requires …