Happy to help

Fantastic Explanation.

Plenty of SWER in South Africa and Namibia. South African development in th 90s. Pleased to hear they are using it in Canada.

And in AU

Same in Brazil. Very common, specially in remote areas, where power demand is low. Otherwise, 3 phase distribution system is the norm.

Exactly And in residential connection neutral is required as almost all of our domestic appliances require 240V to run that is the phase voltage or the voltage between neutral and phase.

Ibn taymia discovered that?

Technically, there is no energy loss but there can be an electrical power loss.

@@georgejetson4378 Considering power is simply energy/time, that's a bit hard to support.

@@stargazer7644 Energy unlike power is conservative.

Perfect

Glad it was helpful!

He explained it wrong. How can you balance the load? They cant. Only the end user, like a motor or heater with the same resistance on each fase.

Search for Delta Wye Substation. The solution is in the substation transformers. They are not just 3 separate transformers.

You do see an imbalance, except it doesn't only load one phase like the star secondary. The imbalance will appear as greater load across two phases on the delta primary. This is the same as if you were to disconnect the neutral line's tie from the starpoint of the transformer. All the single phase loads will draw from one phase, go onto the broken neutral, travel through another load and back to another phase. (Of course you're now dividing line voltage unequally across differently sized single phase loads, but the analogue stands)

It's not the neutral wire and it's not connected to the transformer of that high voltage line. That's a shield for the pylons against lightning strikes. They are grounded for this reason. Some of them are OPGW cables (optical ground wires) and are made of optical fibers in the center, surrounded by steel and aluminum. It provides communication between electrical power plants.

Thanks, that’s clear now.

you can but dont use any earth protection device only u can use one switch for operation.

all the best!!

Isn't integral to the explanation he is giving. Yes you would have your N to Ground connections to prevent floating voltages

Very good question! Actually, mid points of stars on both sides can be grounded, and earth can play the role of neutral wire. But this is not usually done for the purposes of protection. Having grounded mid points and neutral wire is the best option

Load on the secondary does not affect the primary!! Ps - yes there will be an impact on the primary due to changes in the load on the secondary.

@@GauravJ Thank you for the reply. I’m just still a little confused since prior to this video I have read as well have seen videos explaining the effects of secondary current and secondary back emf actually cancelling some of the primary windings back emf which in turn causes an increase in current in the primary winding. It seemed to make sense and now I am learning something else that is new so I am just trying to make sense of it. It seems as though there are some transformers where the secondary affects primary current but in the case of three phase high voltage transmission lines to a substation it is not the case? Not sure if having secondary neutral and primary neutral bonded makes any difference or not (referring to single bushing transformers supplying power to homes here in the US) i’m not doubting you so I’m sorry if it’s coming across that way, just trying to learn. Seems as though the more I learn, the more I realize how ignorant I am lol.

@@GauravJ If I have a simple transformer and the secondary suddenly draws more watts because of increased load, wouldn't the primary also be supplying an increased amount of watts? So if the distribution side secondary has different loads on the respective phases wouldn't that translate to different loads on the respective primaries and make the transmission side unbalanced?

I totaly agree, when there is a fault on the secondary side of a transformer, that fault will reflect as a high current also in the primary side causing its protection cut out assembly to disengaged. Thus secondary load changes affect the primary circuit of the primary. This is true for every transformer, single phase or three phase,low voltage or high voltage,however in the distribution side,which is a wye configuration,the utility company make sure that load distribution to each phases are balance as possible as they can to minimized imbalances, it will not be perfectly balance since the use of every household,commercial and industries are variable. However placement of transformers particularly single phase are arranged in a manner to minimized imbalances back to utility main three phase transformer.the utilit transformer is usually configured delta primay at 69kV for example while its secondary is wye at say 13.2KV with grounded neutral for single phase loads and will carry the minimized unbalance current back to utility transformer. This minimized unbalance load will have very small effect on the 69KV delta side of the utility transformer, and basically this 69Kv is supplied by powergrid say 230/69KV transformer which has wye-delta configuration. That any minimized imbalances at the 69KV will be even minimized further down back to the generating stations by the succeeding high capacity power transformers.Hence for the wye configured 230KV side with no neutral conductor along those line currents are almost balance, The high Line voltage will even make the imbalances if there is such to have insignificant effect on the three phase voltages even there is no neutral conductor connecting the two sides of the distant transformer of the power grid and the distribution or the utility company. The higher the transmission voltage the better to use wye with no neutral to save coil insulation for the transformer due to line voltage divide by square root of 3, rather than a delta configured that the phase voltage will be equal to line voltage hence it will require thicker insulation for the coils. This are only few considerations in the design to use wye or delta in the high voltage transmission lines. So wye or delta can be possible configuration in high voltage transmission lines because the three phases are almost balance in terms of their line currents.

Thanks for watching

Glad you enjoyed it

Glad it was helpful!

hello your questios make no sense pls try again

Glad it was helpful!

thank you brother

Very nice

The neutral doesn’t “ balance the loads” … if the loads are equally loaded you do not require a neutral at all. In a balanced system minus & plus values are equal so the neutral conductor will equal zero at all times. The neutral carries the remainder of the current in an unbalanced load. As per kerchov law that states what goes in must equal what comes out. The path of least resistance is the neutral, the general mass of the earth has a variable resistance & the neutral is a constant connection of a set resistance they don’t even compare in resistivity. So if you are waiting for the star point to earth to become the “ path of least resistance” then you have a very long wait before its value beats the neutral. SMH.😂

@@goaway9487 You cant balance the load. How wil you do that ? This only works ive you for sure the users only use balanced machines, like motors. But that never will be the case, only in end users line. The earth is the nul line, he explained it wrong

Search for Delta Wye Substation. The solution is in the substation transformers. They can do a bit of balancing. But engineers have to balance single phase going to subdivisions periodically to ensure the load is mostly balanced across the three phases.

No. It does not.

because no current flows thru hm

The neutral is almost certainly strung along in the secondary space, with the services and secondary conductors. It may not be at the top of the pole with the other primary equipment.

@@req44 Well, it is clear to me. Only one conductor running at the top of the pole. Many many single phase step down transformers being connected to this SAME one conductor. Naturally each can is connected to earth coming from a COMMON POINT inside the transformer. AKA multi point grounding system. Still looking for this mysterious neutral conductor ( which is not evident) comment please

Post a picture of the poles and I'm sure we'll find the neutral. Electricity doesn't work too well without a return, and the earth, as good as it is, can never be relied on to replace a conductor for regular use.

My friend, check-out SWER systems (single-wire earth return) and I reckon you shall find the answer you are looking for. Hope it helps from a fellow electrical engineer!

the circuit breaker will open that circuit.

we have a course on circuit breaker control schematics. Below is the link - courses.theelectricalguy.in/courses/Circuit-breaker-control-Schematics-Masterclass--Beginner-to-Advanced---647b08bce4b08fb4470c3021

It is not necessary to use only the delta delta connection in transmission ..

My thought too...🤔

You're most welcome

Thank you. Sure. Will try

Thank you 😊

Glad it was helpful!

Transmission 115 kv and above Y

Which configuration? ΥΔ, ΔΔ or ΔΥ?

@@MultiSigen Y∆ with generation in star and transmission in delta , it can be ∆∆ too with generation in delta and transmission also in delta transmission is generally in delta

Exactly my thought .. so now am behind with the explanation above...🤔

Well, the whole reason we can use delta connections is because the load is balanced!

It was just an example for understanding. But even if you take the actual values at 360 degrees the sum will be zero.

@@GauravJ Ah ok. I got a bit confused there. It might be better, if using 360 as an example to put amplitude as Imax*sqrt(3)/2 to avoid confusion. But you are right, the add up to zero.

Exactly, if at any time one of the phases is 0, neither if the other two can be max. It was an unnecessary simplification causing more confusion.

Not required there as well

Faraday cage NOT Maxwell. OPGW normally use single mode fibre optic. Multimode cannot go the distance; more than 100 Km.

@@anuardalhar6762 Sr Moment. U are correct

You need to go back to school and get your degree again...

Agreed. It was an unnecessary and bad attempt at simplification.