Electrical Protective Devices and Their Applications
Deciding on what protective devices need to be used in an application is a difficult task unless you are doing electrical protection as your profession. An appendix of this standard …
Low Voltage Fuses Applications
Despite the advancement of re-settable circuit protection devices, fuses are here to stay. In some applications, fuses are irreplaceable particularly in high current limiting or fast fault-current interruption applications. Fuses …
The Purpose of Maximum and Minimum Short-circuit Currents
The calculation of maximum and minimum short-circuit currents has been discussed in IEC 60909 – Calculation of Maximum and Minimum Short-circuit Currents. What is the significance of these values? The …
Circuit Breaker Ratings – A Primer for Protection Engineers
This paper prepared by Bogdan Kasztenny, Schweitzer Engineering Laboratories, Inc., and Joe Rostron, Southern States, LLC which was presented at the 71st Annual Conference for Protective Relay Engineers and can …
Safety Against Overvoltages
Overvoltages are unwanted potentials occurring in electrical systems between a phase conductor and the earth or ground, or between phase conductors having a peak value greater than the peak of …