Very informative well explain, it means a dangerous thing once the neutral conductor is removed in a wye transformer config 4 wire distribution system. Some loads will be like a firecrackers since they will be operating at higher voltages beyond their ratings, while other loads from other phases will experience low voltage and will experience heating causing damage eventually if not addressed immediately by the utility company. It is a floating neutral. It is like a boat that is not achored when the owner left it, and to his/her surprised the boat is gone taken away by the wave.
So what I wanted to know during this whole great video(and it is good) was what the voltage is going to be at the broken neutral to ground or in your drawing at the purple x . This is so important and I cannot beleive you skipped this part about "broken neutrals". No offense , but such a good video should include the shock hazzard associated there. In your circuit the V-drop for both resistors is 115v for the higher Z and 92v for the lower Z so what is the voltage at X (broken neutral to ground) Jim.
I was in a factory when they lost Neutral connection, I had a laptop charger plugged in the Charger literally blew up, Lap top, survived frightened the living day lights out of me. This was in the UK where our single phase voltage is nominal 220v.
Nominal 240v And your laptop SMPS will have seen a spike in voltage of over 400+vac, as the rectified voltage is the Vpeakxsqrt2 then we can safely say the main rectifier capacitor handled 560+vdc which was most likely the part that exploded ( those universal smps primary smoothing capacitors are rated only for 450v max)
Hi Zac, Thanks for this great video and informative explanation. Would you please advise if neutral wire breaks on three phase power supply, within a DB with RCD is installed in, would that RCD trip off and cut the power off in case of loss of neutral wire. Thank you.
Indicated open neutral. The less LOAD (8A of current) will continue to function. HOWEVER do not touch the open neutral (line side) as indicated. Kirchhoff’s voltage rule for series circuits. Believe this is correct, comment please.
What about when the neutral isn’t broken but becomes a higher impedance. In Australia we have the earth tied to neutral so if the neutral break current will flow back to the source via earth. Earth stakes can be very high impedance.
So wait if i have only ground and live without neutral. Device will not work, but can be damaged? And there is not some device in electrical system what can stop damage?
thanks for the education, do you have any recommendations for an auto transformer to run my 2hp well pump with 4000 watt inverter? i have 800 watts of solar panels and will have 8 186 ah 6 volt golf cart batteries
I once got shocked doing a plumbing repair that had a ground cable going to it from Earth. I was standing in water and soldering the two pipes together. What a pleasant experience when I grabbed both pipes simultaneously.
Can you explain it with the 3 phases and 3 unbalanced impedances?, because of the current have 2 paths on the joint, so how i calculate the current on the differents loads when the total load is unbalanced i cant use root3, So i can calculate each (Z) voltage for a given unbalanced load with no neutral
The principle works out the same with all 3-phases loaded up. You'll only have current flowing A to B, and then B to C and then C to A because of the alternating current sine wave. The math would all be the same though
@@ZackHartle yes if you do as a function of time its just a DC circuit.. but for example Z1 would have a voltage because of Z2-Z1 and Z3-Z1 like you say It would give me diferentt values at diferentt times , but there must be a way to calculate the RMS values, i find equations with relationship of the impedances looking for secuence zero voltages but dont know how to apply
I wish I’d have had a chance to watch your videos back when I was struggling in technical college, my grades would have been much improved. Great explanation, really clear and brilliantly presented. Thank you!
so the neutral is basically like a wastegate for unbalanced voltage?
Very informative well explain, it means a dangerous thing once the neutral conductor is removed in a wye transformer config 4 wire distribution system. Some loads will be like a firecrackers since they will be operating at higher voltages beyond their ratings, while other loads from other phases will experience low voltage and will experience heating causing damage eventually if not addressed immediately by the utility company. It is a floating neutral. It is like a boat that is not achored when the owner left it, and to his/her surprised the boat is gone taken away by the wave.
Thank you! So glad I came across your channel! Your explanations are very clear and straightforward.
If the ground is hooked up to the neutral point, does that mean that current goes to ground when it's energized
So what I wanted to know during this whole great video(and it is good) was what the voltage is going to be at the broken neutral to ground or in your drawing at the purple x . This is so important and I cannot beleive you skipped this part about "broken neutrals". No offense , but such a good video should include the shock hazzard associated there. In your circuit the V-drop for both resistors is 115v for the higher Z and 92v for the lower Z so what is the voltage at X (broken neutral to ground)
Jim.
Zack, the way you explain things is clear, concise, and easy to understand. Thank you for sharing your knowledge with us.
You're very welcome!
I was in a factory when they lost Neutral connection, I had a laptop charger plugged in the Charger literally blew up, Lap top, survived frightened the living day lights out of me. This was in the UK where our single phase voltage is nominal 220v.
Nominal 240v
And your laptop SMPS will have seen a spike in voltage of over 400+vac, as the rectified voltage is the Vpeakxsqrt2 then we can safely say the main rectifier capacitor handled 560+vdc which was most likely the part that exploded ( those universal smps primary smoothing capacitors are rated only for 450v max)
Will it become a phase to phase short circuit condition when neutral breaks ?
You said it becomes a series circuit but what about the third load that isn't visible on the screen?
Surely if the is a third phase that becomes a parallel path
Thank you Senior Pablo!
You are ignoreing the main earth
Hi Zac,
Thanks for this great video and informative explanation. Would you please advise if neutral wire breaks on three phase power supply, within a DB with RCD is installed in, would that RCD trip off and cut the power off in case of loss of neutral wire.
Thank you.
Indicated open neutral. The less LOAD (8A of current) will continue
to function. HOWEVER do not touch the open neutral (line side) as indicated. Kirchhoff’s voltage rule for series circuits.
Believe this is correct, comment please.
What about when the neutral isn’t broken but becomes a higher impedance. In Australia we have the earth tied to neutral so if the neutral break current will flow back to the source via earth. Earth stakes can be very high impedance.
тамаша. Рахмет Жигиттер
So wait if i have only ground and live without neutral. Device will not work, but can be damaged? And there is not some device in electrical system what can stop damage?
In your example you are not considering the L3. So, the two loads are not in series, as part of the current is flowing to the 3rd phase.
I please with your content. Thank you very much. Please keep doing this, Soon you will popular on this platform
thanks for the education, do you have any recommendations for an auto transformer to run my 2hp well pump with 4000 watt inverter? i have 800 watts of solar panels and will have 8 186 ah 6 volt golf cart batteries
I once got shocked doing a plumbing repair that had a ground cable going to it from Earth. I was standing in water and soldering the two pipes together. What a pleasant experience when I grabbed both pipes simultaneously.
Thanks alot for your tutorials and it's very useful for me and I've got 309A license
I love this channel, the whole drawing thing is a genius idea and works great for any kind of explaining
Glad you enjoy it! Thanks for watching!
Super sir
He writes faster backwards faster than I can forward. Impressive.
very informative video, congratulation
Excellent!
Like how you formatted the video!
Easy to understand.
Larry
Glad you liked it
Excellent explanation
Get a rcd.. URGGH
Awesome video
Can you explain it with the 3 phases and 3 unbalanced impedances?, because of the current have 2 paths on the joint, so how i calculate the current on the differents loads when the total load is unbalanced i cant use root3,
So i can calculate each (Z) voltage for a given unbalanced load with no neutral
The principle works out the same with all 3-phases loaded up. You'll only have current flowing A to B, and then B to C and then C to A because of the alternating current sine wave. The math would all be the same though
@@ZackHartle yes if you do as a function of time its just a DC circuit.. but for example Z1 would have a voltage because of Z2-Z1 and Z3-Z1 like you say It would give me diferentt values at diferentt times , but there must be a way to calculate the RMS values, i find equations with relationship of the impedances looking for secuence zero voltages but dont know how to apply
@@yametekudasaisensei539 That's a little beyond my knowledge.
I wish I’d have had a chance to watch your videos back when I was struggling in technical college, my grades would have been much improved. Great explanation, really clear and brilliantly presented. Thank you!