Read about electrical | 154 Discussions | Page 1

  1. srinaath

    Arcing in electrical relay contacts due to different types of loads

    Arcing in a contact occurs due to open and close action of the switch. I am curious if the arc intensity depends on the type of load. For example the arcing (arc intensity) due to induction load will be greater than arcing due to resistive load?
  2. I

    Bussbar supports

    Why it's not a practice to use such busbar spacing insulator arrangement as it's showed in the picture from attachment (one busbar above other)?
  3. K

    4160V Reduced Voltage Starter Question (run and shorting contactors are closed at the same time)

    Can someone give me some insight into what would happen at the motor terminals and on the line if 2K2 (run Contactor) and 2K3 (auto xfmr wye contactor) were to close simultaneously. There are interlocks to prevent this, but I would like to know out of curiosity. My theory is that you would have...
  4. K

    Voltage measurement on a Current Transformer (CT)

    I don’t know the ratio of the CT. I’m just looking for an explanation on this. I thought in order to measure output voltage you need to pass the current through a resistor and read the voltage drop. A co worker put 400a through the CT and measured 130v. Something just seems off to me. Can you...
  5. K

    Vacuum interrupter contacts and displacement current

    I’m self taught so I have a lot of holes in my understanding. I also have little to no mathematical understanding. Even though ironically, I tend to prefer to picture electricity as numbers rather than “water” in a pipe, etc. I’ve been studying displacement current recently and have a question...
  6. K

    Strange Ground Current Loop

    In the attached picture, I’ve drawn a crude schematic of the motor circuit. It is fed from a switchgear feeding 3 total motors. The feed contains 2 parallel conductors on each phase and ground. The equipment ground reads 12a going back to the switchgear, 6a per conductor. From the starter to...
  7. J

    Engineering Calculating the gap of a parallel plate capacitor

    I've been given this question for my TMA2, I've tried looking at the learning material but it gives no information on how to calculate the gap? Does anyone have a formula for this? Or can someone point me in the right direction? Thanks
  8. D

    Engineering Mechanical or electrical?

    Hello, I want to do what a mechanical engineer does but with the electromagnetic force. What should I study mechanical or electrical engineering? An ideal job for me would be designing the magnetic system for motion in a maglev train, for example.
  9. D

    Engineering Mechanical or electrical engineering

    How to know if I’m more inclined towards mechanical or electrical engineering?
  10. Ramazan Duzgun

    How can Center-tapped Transformer parameters be found?

    It is a common center-tap transformer which is electrically demonstrated as in figure (ideal one); In my opinion, open circuit and short circuit tests cannot be applied directly. How can I place secondary reactances ? And how can I test its all parameters in laboratory ?
  11. D

    Electrical Enclosed water turbine power generation

    In theory or at least in my head, it seems simple enough to me. A simple water pump, such as a pool pump pushes water through a pipe into a water turbine and recycles the water directly back to the pump. With some of the hydrogenerators I've seen out there, they produce far more power than the...
  12. Boltzman Oscillation

    Electrical Engineering: Is this signal stable?

    Homework Statement y(t) = x(1-5t) Homework Equations none The Attempt at a Solution well I've never looked at the stability of a signal which has a time scale and shift. My guess is that it is stable as anything I can provide as input will output a bounded signal. Ex: if x(t) is u(t)...
  13. R

    Could you create a battery powered plane?

    After watching a video on YouTube, I recently became interested in the dynamics and physic's of why we aren't using electrical powered planes instead of burning thousands of fossil fuels every day. After doing a bit of my own research, I found the problem. When we increase the weight, we have to...
  14. J

    Electric Motor question

    If a motor slowed to a halt, will the curent go up or down
  15. J

    Engineering AC Source driving an RLC circuit...

    Homework Statement 10 v, 100 hz goes into a circuit of a 1o resistor, a 1o inductive reactance and a 1o capacitive reactance that are in series. What is the current. What is the V across the cap. Homework Equations and the attempt at a solution[/B] So I know I = V/Z and Z = sqrt( R^2 +...
  16. A

    Is the source in parallel or series with the resistor?

    Thank you for your time and effort. It is much appreciated. 1. Homework Statement I have attached the problem with the solution to this thread. Basically, the problem asks to construct the circuit model for a generic device by using the data of terminal current and voltage measurements. From...
  17. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Course introduction; Negative feedback control

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Course introduction; Negative feedback control

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  18. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  19. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Step response, sinusoidal steady state response

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Step response, sinusoidal steady state response

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  20. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Loop gain and unity loop gain frequency; Opamp

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Loop gain and unity loop gain frequency; Opamp

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  21. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Opamp realization using controlled sources; Delay in the loop

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Opamp realization using controlled sources; Delay in the loop

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  22. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with ideal delay-small delays

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with ideal delay-small delays

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  23. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with ideal delay-large delays

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with ideal delay-large delays

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  24. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with parasitic poles and zeros

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with parasitic poles and zeros

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  25. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with parasitic poles and zeros; Nyquist criterion

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Negative feedback amplifier with parasitic poles and zeros; Nyquist criterion

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  26. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Nyquist criterion; Phase margin

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Nyquist criterion; Phase margin

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  27. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Phase margin

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Phase margin

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  28. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Single stage opamp realization

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Single stage opamp realization

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  29. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Two stage miller compensated opamp - 1

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Two stage miller compensated opamp - 1

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
  30. Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Two stage miller compensated opamp - 2

    Analog IC Design by Dr. Nagendra Krishnapura (NPTEL):- Two stage miller compensated opamp - 2

    COPYRIGHT strictly reserved to Prof. Dr. Nagendra Krishnapura and NPTEL, Govt. of India. Duplication Prohibited. Lectures: http://www.nptel.ac.in/courses/117106030/ Syllabus: http://www.nptel.ac.in/syllabus/syllabus.php?subjectId=117106030
Top