Catalog of Electrical Engineering questions with useful answers that help you develop a clear insight of your conceptual problems.
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The pull-out torque of a synchronous motor refers to the maximum torque it can produce before losing synchronism with the rotating magnetic field. At this point, the motor begins to decelerate and may lose its ability to maintain a fixed speed. Pull-out torque is a crucial parameter in motor design, indicating the motor’s robustness against … Read more
Pull-in torque or starting torque of synchronous motor is the minimum torque required for the rotor to pull-in or attain synchronous speed with the rotating magnetic field. It signifies the point at which the motor can successfully synchronize with the applied AC voltage, ensuring proper operation. This parameter is essential for preventing stalls during startup … Read more
The term “hunting” in the context of synchronous motors refers to a phenomenon where the motor speed oscillates or fluctuates around its intended or synchronous speed. Also see: Top 50 Basic Electrical Engineering XYZ Questions PDF Handbook Download Synchronous motors are designed to operate at a constant speed that is synchronized with the frequency of … Read more
One of most important and basic Electrical Engineering Question is, Why LED is Not Made of made of silicon or germanium and is made of Gallium arsenide (GaAs), Gallium arsenide phosphide (GaAsP), or Gallium phosphide. In this article Electrical Engineering XYZ answers this question. Also download our Handbook on Top 50 Basic Electrical Engineering Questions … Read more
A voltage surge, also known as a power surge or transient voltage, refers to a short-duration increase in voltage above the normal levels in an electrical circuit. These surges can vary in magnitude and duration and can be caused by various factors, such as lightning strikes, power outages, short circuits, or the operation of high-power … Read more
Reducing earth resistance in grounding systems is crucial for ensuring the safety and efficiency of electrical installations. Modern solutions focus on improving soil conductivity and optimizing the design of grounding systems. Also see: Here are some contemporary approaches and examples of methods to reduce earth resistance: FurseCEM® by ABB FurseCEM conductive aggregate by ABB is … Read more
Bentonite is a type of clay that is often used in earthing pits to improve the conductivity and overall performance of the grounding system. Also see: The use of bentonite in earthing pits offers several advantages: The figure below displays ABB’s bentonite moisture retaining clay. When using bentonite in an earthing pit, it is typically … Read more
Salt and charcoal are sometimes added to earthing pits to improve the conductivity of the soil and enhance the efficiency of the grounding system. However, this is a temporary solution. Also see: Important to know: Adding Salt and charcoal in earth pit is not a universal practice, and most regulations and standards don’t permit this … Read more
A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. Also see here: Thyristors in Power Electronics Handbook
The most serious fault on alternators that requires immediate attention is the stator winding fault. These faults occur primarily because of the insulation failure of the stator windings. The main types of stator winding faults, in order of importance in ascending order are mentioned below: It is important to note that stator winding faults are … Read more