Catalog of Electrical Engineering questions with useful answers that help you develop a clear insight of your conceptual problems.
List of topics:
In industry, 30 volts is generally considered to be a conservative threshold value for dan- gerous voltage. The cautious person should regard any voltage above 30 volts as threatening, not relying on normal body resistance for protection against shock. That being said, it is still an excellent idea to keep one’s hands clean and dry, … Read more
Destructive testing (often abbreviated as DT) is a test method that is carried out to find the exact point of failure of materials, components, or machines. During the process, Electrical Engineers subjected the item to stress level that eventually deforms or destroys the material. In this article Electrical Engineering XYZ answer your question: What is … Read more
This CT’s ratio of 3000:1 indicates that it will step down primary current by 3000 times. For example, if primary has 3000 Amps current, the secondary will have 1 Amps. In case of 5 amp AC signal at input, the transformer will step it down to 1.667 milliamps AC. Where 5/3000 = 1.667 × 10-3 … Read more
A thermal power plant is a power plant that converts thermal energy (heat) into electrical energy. Want to read more about thermal power plants, learn here in this Electrical Engineering XYZ article. While the primary reason for building thermal power plants near rivers is availability of plenty of water, there are certain other reasons as … Read more
Distribution line reclosers, unlike circuit breakers located in substations, cannot rely on an auxiliary “station power” energy source for opening and closing its line-interrupting contacts. Therefore these small units utilize AC line voltage as the actuating power for the contacts. Low- voltage “trip” and “close” circuits still exist for control purposes, but the actual energy … Read more
An electrical motor drive refers to the system that controls the speed, torque, and direction of an electric motor. The primary purpose of motor drives is to regulate the performance of electric motors in various applications, such as industrial machinery, robotics, electric vehicles, and HVAC systems. Motor drives are essential for achieving precise control and … Read more
Regulating the electric power sent to an electric motor is a task performed by high-speed switching transistors inside a motor drive, modulating the pulse-width of a high-frequency square wave to the motor. As a result of this High-frequency current and voltage noise appears at input terminals of Motor Drives as explained earlier. One of the … Read more
An electrical motor drive refers to the system that controls the speed, torque, and direction of an electric motor. The primary purpose of motor drives is to regulate the performance of electric motors in various applications, such as industrial machinery, robotics, electric vehicles, and HVAC systems. Motor drives are essential for achieving precise control and … Read more
The term brake means to slow down, decelerate, or to reduce speed. The term AC motor braking refers to the method of causing an AC motor to brake, or slow down. Given below are some methods for braking or slowing down induction motors. Click any of above methods to start learning or Download the PDF … Read more
Both Additive and Subtractive Transformer terms are related to polarity concept. Transformer polarity is very important in the electric power industry, and so terms have been coined for different polarity orientations of transformer windings. If polarity dots for primary and secondary windings lie on the same physical side of the transformer it means the primary … Read more