Catalog of Electrical Engineering questions with useful answers that help you develop a clear insight of your conceptual problems.
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Question statement: What are some advantages of a 3-phase transformer over 3 single-phase bank of transformers? Answer: Some advantages of a 3-phase transformer over 3 single-phase bank of transformers are: Less space requirement: A 3-phase transformer occupies less space as compared to 3 single-phase transformers Less cost: Generally a 3-phase transformer will cost less as … Read more
Audible noise is an effect primarily originating from the phenomenon of magnetostriction: the slight change of length exhibited by a ferromagnetic object when magnetized. The familiar “hum” heard around large power transformers is the sound of the iron core expanding and contracting at 120 Hz (twice the system frequency, which is 60 Hz in the United … Read more
Large power transformers have their core and windings submerged in an oil bath to transfer heat and muffle noise, and also to displace moisture which would otherwise compromise the integrity of the winding insulation. Heat-dissipating “radiator” tubes on the outside of the transformer case provide a convective oil flow path to transfer heat from the … Read more
When a transformer is initially connected to a source of AC voltage, there may be a substantial surge of current through the primary winding called inrush current. (Figure below) This is analogous to the inrush current exhibited by an electric motor that is started up by sudden connection to a power source, although transformer inrush is caused … Read more
Aside from power ratings and power losses, transformers often harbor other undesirable limitations which circuit designers must be made aware of. Like their simpler counterparts — inductors — transformers exhibit capacitance due to the insulation dielectric between conductors: from winding to winding, turn to turn (in a single winding), and winding to core. Usually this … Read more
Question: Describe the basic construction and parts of a Transformer? The basic construction of transformer involves two coils of wire that are wrapped around a ferromagnetic core. The figure below shows a transformer cut in half and showing its core and windings: Note that the transformer has two windings namely: Primary windings Secondary windings And … Read more
Top 10 Electric Transformer Questions with brief explanatory answers.
Calibration and re-ranging are the two most important and fundamental concepts every Instrumentation Engineer should know. In this article, you’ll learn the basic difference between calibration and re-ranging of instruments and devices. What is Calibration To calibrate an instrument means to check and adjust (if necessary) its response so the output accurately corresponds to its … Read more
The airplanes use aviation fuels that are either petroleum-based fuels or are petroleum and synthetic fuel blends that are used to power the aircraft. Here a question arises: Is it Possible to Design Electric Plane? The simple answer is NO! This video discusses the answer in brief and complete calculations behind this:
Power Transmission and Distribution Questions and Answers PDF Dowload by ElectricalEngineering.XYZ ElectricalEngineering.XYZ presents Power Transmission and Distribution Questions and Answers in PDF. Title: Power Transmission and Distribution Questions PDF Download Click here List of Questions: What is Power Transmission? What is Corona in Transmission Lines What is ACSR? What is Sag? What is an Insulator? … Read more