Equipment Protection Level
In the selection of electrical equipment for Oil & Gas industry application, particularly those inside classified hazardous areas, the equipment protection level is necessary as a criterion. Equipment Protection Level …
Motor Protection -Direct Temperature Sensing
The service life of electric motors is dependent on two (2) main components: Electrical components (i.e. windings & insulations); Mechanical components (i.e. core, shaft, bearings, frame and cooling system). The …
Differential Protection – Fast and Reliable
A few years back, I was seconded to assist in the commissioning of a cooling tower for a 1000 MW coal thermal power plant. The cooling tower was not a …
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 …