Estimation of Plant Electrical Load – Part 1
Note: This is the first part of a series of articles in the estimation of pant electrical loads. In the design of a plant power system, one of the early …
Hardwired vs Software Interlocks
As an Electrical Engineer, I am biased to hardwired interlocks. I don’t have any doubts software can be very efficient particularly during normal operating conditions, not to mention the speed …
Identification of Conductors And Terminals – IEC 60445
The IEC Standard 60445 – Basic and safety principles for man-machine interface, marking and identification – Identification of equipment terminals, conductor terminations and conductors published in August 2010 is a …
Miniature Circuit Breaker Applications
Miniature circuit breakers despite being common in domestic use are not created equal. There are several types of MCBs with different tripping characteristics, each of which are designed for particular …
IEC Motor Protection Coordination
IEC 60947-4-1 addresses coordination between the motor circuit protective devices and the motor starters. It also provides a method to measure performance of these devices if a short-circuit occurs. This …
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 …