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 …
Motor Cable Selection Chart Explained
Important: Please note that any materials presented herein is subject to the conditions of the disclaimer of this site. I am receiving a significant number of enquiries on how to …
Modes of Operation – Variable Speed Drives
Variable speed drives are capable of operating in 4-quadrant modes of operation. When energy is transferred from the electric motor to the mechanical load, it is operating in motoring mode. …
System Voltage Classes (ANSI)
In ANSI C84.1-2011, Clause 3, system voltage classes were explained Low Voltage (LV) A class of nominal system voltages 1000 volts or less. Medium Voltage (MV) A class of nominal …
Electrical Power System Studies
Power system studies vary significantly In each design process depending on the purpose of the project. It would be better to have a complete study on your project rather than …
Protection Against Electric Shock – Indirect Contact
IEC 60364-4-41 Electrical installations of buildings – Part 4-41: Protection for safety – Protection against electric shock has provided several measures of protection against indirect contact listed as follows: Automatic …