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 …
A Junction Box Is Required
In this article, I mentioned that a small change in the later stages of the project execution has a massive impact in cost and schedule. Another good example is what …
Concept Selection or Detail Design
Which do you like better “Concept Selection” or “Detail Design”? I was once asked this question in one of my job interviews. To understand this discussion better, we need to …
Three Elements of Good Engineering Design
Practically, all engineering design problems require three (3) elements to come up with a complete solution. 1. Measurable Elements. These elements can be determined with exactness. Example – material costs, …