Catalog of Electrical Engineering questions with useful answers that help you develop a clear insight of your conceptual problems.
List of topics:
A device receiving the signal output by a controller to directly influence the process. Examples: variable-speed electric motor, control valve, electric heater. Similar Basic Questions in Industrial and Control Systems Engineering: Reference and Further Reading: Basics of Industrial Instrumentation Handbook
When the controller generates an output signal based on the relationship of process variable (PV) to the setpoint (SP). Similar Basic Questions in Industrial and Control Systems Engineering: Reference and Further Reading: Basics of Industrial Instrumentation Handbook
When the controller’s decision-making ability is bypassed to let a human operator directly determine the output signal sent to the final control element. Similar Basic Questions in Industrial and Control Systems Engineering: Reference and Further Reading: Basics of Industrial Instrumentation Handbook
One of the very basic question in Electrical Engineering is “What is more dangerous AC or DC”. In this article Electrical Engineering XYZ answers what is more dangerous AC or DC as well as 100 mA AC at 60 Hz or 500 mA DC what is more danogerous. Low-frequency (50- to 60-Hz) AC used in … Read more
Special-purpose electronic test instruments called loop calibrators exist for the express purpose of 4-20 mA current loop circuit troubleshooting . These versatile instruments are generally capable of not only measuring current , but also sourcing current to unpowered devices in a loop , and also simulating loop – powered 4-20 mA transmitters. Download here complete … Read more
Transformers are also constrained in their performance by the magnetic flux limitations of the core. For ferromagnetic core transformers, we must be mindful of the saturation limits of the core. Remember that ferromagnetic materials cannot support infinite magnetic flux densities: they tend to “saturate” at a certain level (dictated by the material and core dimensions), … Read more
The ground resistance of a grounding system primarily depends on four variables. These factors include: Length/depth of the ground electrode, the diameter of the ground electrode, the number of ground electrodes in system and the design of system. While talking about ground, one of the most important question that arises in mind is What ground … Read more
Heating and noise are two most notable undesirable physical impacts in transformers. In this article, ElectricalEngineering.XYZ shares the role of oil in transformers. In addition to unwanted electrical effects, transformers may also exhibit undesirable physical effects, the most notable being the production of heat and noise. Noise is primarily a nuisance effect, but heat is … 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 … Read more
Dot Convention on Electrical Transformers is an important concept that should be understood by every one in power industry. In this article Electrical Engineering XYZ shares what is meaning of dot convention on Electrical Transformers. In order to denote phase relationships, transformer manufacturers have come up with a sort of polarity marking standard. It is … Read more