![Dave Gordon](/img/default-banner.jpg)
- Видео 53
- Просмотров 3 768 558
Dave Gordon
Добавлен 6 июн 2020
Transformer Current and Power
Demonstration of voltage and current ratios, and explanation of why the primary voltage increases when loads are added to the secondary.
In my "Buck-Boost Transformers" video I use the concept of relative polarity to adjust voltages up or down by connecting primary and secondary windings in either an additive (in-phase) or subtractive (out-of-phase) orientations. ruclips.net/video/aOtSnJo6PfM/видео.html
In my "120/240 V In-Phase or Out-of-Phase" video I address the concept of reference and how that can appear to flip one waveform relative to another. ruclips.net/video/nOSYHUxHxG8/видео.html
In my "Dual Voltage Windings - Part 1" video I briefly mention polarity as relates to the H1/H2/H3/H4 ...
In my "Buck-Boost Transformers" video I use the concept of relative polarity to adjust voltages up or down by connecting primary and secondary windings in either an additive (in-phase) or subtractive (out-of-phase) orientations. ruclips.net/video/aOtSnJo6PfM/видео.html
In my "120/240 V In-Phase or Out-of-Phase" video I address the concept of reference and how that can appear to flip one waveform relative to another. ruclips.net/video/nOSYHUxHxG8/видео.html
In my "Dual Voltage Windings - Part 1" video I briefly mention polarity as relates to the H1/H2/H3/H4 ...
Просмотров: 13 619
Видео
Transformer Ratios and Taps
Просмотров 16 тыс.Год назад
An explanation of how Voltage Taps are used to manipulate Transformer Primary to Secondary Ratios in order to ensure proper output voltages.
Transformer Secondary Winding - Mutual Induction
Просмотров 16 тыс.Год назад
Demonstration of how voltage is induced into a transformer secondary winding.
Transformer Core and Cooling
Просмотров 15 тыс.Год назад
A description of how and why a transformer core works, and the importance of keeping a transformer within its temperature rating.
Transformer Primary Winding
Просмотров 24 тыс.Год назад
Description of a primary winding of a transformer and how it limits current flow.
120/240 V In-Phase or Out-of-Phase
Просмотров 163 тыс.2 года назад
Explanation of the phase relationship between the two transformer secondary windings, or two halves of the winding, feeding a 120/240 V Single-Phase system.
Feeder Taps, 240.21(B)
Просмотров 37 тыс.2 года назад
Explanation of Feeder Tap rules and concepts found in 240.21(B).
Overcurrent, Overload, Short Circuit, and Ground Fault
Просмотров 813 тыс.2 года назад
Explanation of definitions and concepts for the various types of "Overcurrents" ("Overload", "Short Circuit", and "Ground Fault").
Open Neutral
Просмотров 819 тыс.2 года назад
Demonstration and explanation of the effects of an "open neutral."
310.15(E) Neutral Conductor
Просмотров 67 тыс.2 года назад
Explanation of when and why we count a neutral as a current carrying conductor for the purpose of derating (ampacity adjustment).
310.15(B) Temperature Correction Factors
Просмотров 34 тыс.2 года назад
Explanation of 310.15(B): How and why to use ambient temperature correction factors to determine conductors' new ampacities in hot or cold environments.
310.15(C) Ampacity Adjustment Factors
Просмотров 40 тыс.2 года назад
Explanation of 310.15(C): How and why we adjust ampacities when we have more than three current carrying conductors sharing a raceway or cable.
240.4(B) - The "Round-Up" Rule
Просмотров 14 тыс.2 года назад
Explanation to help in understanding NEC 240.4(B) "The Round-Up Rule" for conductor protection, in which I also reference T-310.16, 240.4(D), and T-240.6(A) from the 2020 NEC.
240.4 & T-310.16 Conductor Protection and Ampacity
Просмотров 42 тыс.2 года назад
Understanding Conductor Protection (240.4) and how to use the most common Ampacity Table in the NEC (T-310.16). I also look at several Code sections that relate directly to T-310.16 and consider Insulation Ratings. [All Code Sections from 2020 NEC]
Comparing Series and Parallel RLC Circuits
Просмотров 25 тыс.3 года назад
A comparison of Series and Parallel RLC Circuit Reactances, Currents, and Vectors at varying frequencies.
Transformer OCPD - Pri. & Sec. Protection, Table 450.3(B)
Просмотров 36 тыс.3 года назад
Transformer OCPD - Pri. & Sec. Protection, Table 450.3(B)
Transformer OCPD - Primary-Only Protection, Table 450.3(B)
Просмотров 14 тыс.3 года назад
Transformer OCPD - Primary-Only Protection, Table 450.3(B)
Transformer Secondary Conductors - NEC 240.4(F) & 240.21(C)(1)
Просмотров 15 тыс.3 года назад
Transformer Secondary Conductors - NEC 240.4(F) & 240.21(C)(1)
Reactors and Isolation Transformers
Просмотров 37 тыс.3 года назад
Reactors and Isolation Transformers
Parallel RLC, Effect of Changes in Frequency
Просмотров 6 тыс.3 года назад
Parallel RLC, Effect of Changes in Frequency
Series RLC, Effect of Changes in Frequency
Просмотров 7 тыс.3 года назад
Series RLC, Effect of Changes in Frequency
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you are an amazing individual !! thank you for such a refresher
great explanation sir thanks a lot from India
Gujarati translation helping
Hope you're doing well Dave, your vids are amazing. please do more electrical content !
Great explanation! Just what I was looking for. Thank you!
Hi good morning sir This is Mardorine writing from Cameroon. My question is if the value of the inductor or that of the active reactance was not given. How then will the inductance be calculated ? Given that the angle has been provided ?
Dave, I had to watch your video several times to be sure I was hearing right. Your explanation of the secondary is good but the primary is backward. To decrease the secondary voltage, you have to add turns to the primary. Tapping the primary will raise the secondary voltage. If you tapped the primary down to the same number of turns there are in the secondary, it would be a one-to-one transformer and the output would be 120v. Your formula says it all: to decrease EsubS you have to increase NsuP.
I thoroughly appreciated your lecture, but to make it crystal clear you need to another board or more slides. Very informative and for that i appreciate you .
Great VID, thanks for taking the time.
In the delta transformer, only A to B windings are directly connected to the line voltage of 480 volts. The B to c and A to B windings are connected to the line voltage of 480 volts through a line winding in series with it.
Thank yuo Professor Dave.
This is the best explanation of feeder taps anywhere on the internet. Thank you so much for this video.
Great work from you Sir
Great explaination.....Thanks 🙏
I think this was the best explanation of this material I have ever seen.
There is no way a textbook could teach as wellas these RUclips videos. Great job, invaluable resource toall AC theory students.
Dave, where you at? More knowledge please sir.
Very precise explanation
Wow, thanks professor Dave! That is how we learn.
out...fricking...standing demonstration and explanation
Great job explaining! you hit important points without talking about unrelated things or rambling. Also very engaging energy!
why 2.5 time for primary current??? Not understood
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You are a very fun teacher and a good one at that. Thank you Dave.
GREAT VIDEO. Just up to the 3:25 mark made so much more sense to me to explain this. I'm having neutral issues in my house so I've been told.
Excellent video, thank you so much!
Nice lecture
Thank you sir
The way you explain the theory and break down the circuit for each component is very helpful, thank you
EXCELLENT TEACHING WAY SIR
I will be very greatfull if i get answer to this question: can be ground fault if nutral of transformer isolated
Thank you Dave I really appreciated you describe this in phase and out of phase it was excellent
DC difference from AC
This man is really good he knows how to explain.He is a master keep it up
Great video and idea to learn electric voltage.
How can we know each faults in measurment method?
Great job Dave!
Excellent explanation.........
Just made me think about clockwise vs counterclockwise windings....which I assume is the controlling factor in the arrows?
Under what circumstances would we choose primary-only protection versus primary and secondary protection, or is it simply a matter of preference?
Yes, you do explain well, but your demeanor is that you are talking down to preschool children. I keep waiting for you to say "today boys and girls" or for you to look into the camera and say "I see Billy and Susan, and Tommy, etc...
" I gotta unplug it quickly cause my circuit isn't really rated for that" 😂
Well done!
Nice video!
Well done!!!
Thank you, finally made sense, thank you Jesus
Very good. Thanks 🙏
Derate, not restrict Terminology matters