Identify equipment in a substation (35 - Electricity Distribution)

Let's identify all the key parts of a substation by inspection: transformers, voltage regulators, lightning arresters, reconnectors, fuses, etc. We'll look at a few examples.
Full edX course with interspersed practice problems to help you learn:
www.edx.org/learn/electricity...
Aaron Danner is a professor in the Department of Electrical and Computer Engineering at the National University of Singapore.
www.ece.nus.edu.sg/stfpage/el...
Video filmed and edited by Cheryl Lim.
@randomcheryl

[@fethilakhdari1078]

Both excellent and outstanding video, please keep them coming. Cheers

[@Hossein118]

Very nice 👍 I think watching disconnector switch arcs has a calming and soothing effect.

[@ClintWaggoner]

Thank you for your videos, they are very easy to understand and informational!

[@GoogleUser-ee8ro]

I have signed up for prof Danner’s courses on edX, very interesting and informative; contrary to usual college level circuit courses loaded with 1st order and 2nd order ODEs, this course is hugely practical with not only oscilloscope graphs bench experiments but also very detailed data sheet explanations on electrical elements used in practice 😅

[@richa8383]

Great video. Very clear and well presented. Thank you

[@richa8383]

In railway relays we use silver contacts to prevent arcing.

[@salaheddinerahila9182]

Perfect and well detailed explanation, thanks!

[@rasakiolawoyin5330]

Great and highly informative videos. Thank you Prof.

[@Oklahoman-in6ph]

Nice lesson Aaron Thanks. I am now subscribed👍

[@ClaudinneV]

Thanks a lot. Very well explained. Not strange coming from a professor.

[@adanner]

Thank you so much.

[@synapticmemoryseepage4447]

Excellent video. Thank you.

[@TomofAllTrades]

Great video. The company that I work for builds the polygonal poles for substations and other electrical transmission applications.

[@adanner]

Oh that's really cool!

[@51Sable]

Thanks for detailed presentation

[@c.h.2503]

Thank you very much for this. Perfect.

[@philpaule472]

Great video and very educational

[@raquelsapalaran2907]

great videos very informative❤❤❤

[@LousyPainter]

Great explanation! Thanks.

[@ronehanumansingh3954]

Thank you. Good explanation

[@darthvader3177]

Thanks , very informative video

[@user-op2ho4vw5e]

Super film!

[@zelarommoralez]

Excellent. Perfect face for radio!

[@walidkhodor2257]

Best explanation u can get…, thank U

[@adanner]

So glad you found these useful.

[@eugenericcihipona7165]

Worth watching, thanks for the video

[@adanner]

Thank you for watching and learning. Please spread the word.

[@saniyakhinvasara5391]

Superb Video!

[@sambathbunkh]

Great video shows, I am also working at grid substation.

[@user-wu7cl1jl2j]

nice video . thank you for it 👍👍

[@mehdikarimivagargahi5178]

Fantastic!

[@jonahonom8042]

Very informative

[@xyzct]

Fantastic.

[@garbo8962]

My brother worked over 40 years for PECO ( now Exelon ). First thing the old guy he was with told him he had to learn is where are the best bars thru out Philly. He never packed a lunch and usually drank mean ate lunch at bars.

[@hronc7409]

Awesome video!

[@adanner]

Glad you enjoyed it

[@kapitanbaobao9222]

Nice video :D

[@imadbenhabsa729]

Thank you vey much

[@wdreece8859]

Thank You

[@michaelgagne1911]

Thanks sir

[@salvadorufmt]

Excellent. Not enough likes in this video.

[@tedlahm5740]

Lightening arrestor. ordinarily open. New information to me. thank you

[@oicfas4523]

Yes, they are varistors that will close (and connect to ground) when the voltage across them gets very high from a lightning strike.

[@user-mj5wy5ei7t]

Thanks

[@vishalsathiaseelan679]

Tqvm❤

[@asadullah8255]

Thanks Sir...

[@adanner]

You're most welcome. Hope you found these videos useful.

[@ntandontera1734]

when it's load shedding substation can also work or they use battries

[@yinyanglovebomb]

Awesome

[@adanner]

Thank you for your support.

[@bryanfuentes1452]

Thank you so much for this video. I have a question is recloser and reconnector the same?

[@zachary_smith1]

yes

[@AsanMasraf]

thanks for presenting this information and your efforts, but you have a list or series of videos explaining substations.

[@adanner]

Thank you so much. Hope you found these useful.

[@AsanMasraf]

@@adanner you are welcome

[@FernandoMartinez-eh4xi]

What books you recommend to start studying for substation

[@keithlewis9106]

Aaron Danner @adanner, I seen on metal unity pole a coil of wire from the very top lighting wire and wondering what this does ? I can send a picture if needed. Thanks

[@meekinsstevenmeekins]

Nice presentation and information. Question: Are "Ground Switches" considered "Fuse Switches"? Thanks.

[@iloveAeCe]

Hi Aaron, how much would be the estimated cost to build or construct a high voltage substation? Let's say in a 230kV line.

[@FalconXE302]

Reconnectors are reclosers...?

[@garbo8962]

Cursed local Ultility company when I was on weekend call they sent me to a building I never was in and just had the emergency generator up on the 8th floor replaced. Building had dual 13,200 volt service that tripped out and could not get the ATS switches to transfer back to normal power. For some reason the one elevator on emergency power was not working so I had to climb up from basement to 8 th floor several times. Could not find any books on ATS switches or generator. Here after a few hours called the Ultility company. They told me they were having problem with over voltage that late Saturday night. Think I had over 521 volts instead of usual 480 volts. ATS switch programmed not to transfer power to an over voltage source.

[@dumisanithwala1925]

Is this unique to the US or North America? Our substations look different in 🇿🇦

[@tedlahm5740]

Question: A substation using a 3 wire 3 phase system, is that a Delta system?

[@ericstark626]

Not necessarily. Delta, Wye, and Zigzag are all 3 wire sys. if not using the ground/neutral.

[@tedlahm5740]

@@ericstark626 Thank you. The 3 wire system, no ground/neutral from the substation. Then the only grounding would be DONE are each pole along the distribution system that had a transformer mounted to it? If so, then NO PARALLEL neutral/ground back to the substation? thank you

[@ericstark626]

@@tedlahm5740 Dear colleague, the grounding will be "created/invented" by a 'Y' (or Zigzag) somewhere along the distribution. Body safety grounding connection should not be confused with a Neutral connection created by a phase combination where phases vectors of A+B+C=0 (AKA neutral). Loopback of earth fault is different from neutral fault or unbalanced 3 phases case identified by its 3 symmetrical vectorial components per phase I1+I2+I0=Iphase.

[@tedlahm5740]

@@ericstark626 Sir: How does the Power Company Balance THEIR load when it is a 3 phase 3 Wire (no neutral) distribution system? I notice NUMEROUS 3 phase 3 transformer primary DELTA systems connected to the mentioned distribution system. (The Three L-2 terminals are connected together, so I know THEY are Delta primary.

[@mcarling6495]

@@tedlahm5740 Substation transformers typically are delta on the primary side and wye/star on the secondary side. These transformers significantly reduce the imbalance from the loads on the secondary side passing to the primary side. This is because the load on each secondary phase gets transferred to two of the primary phases. In other words, each primary phase carries about half the load of each of two different secondary phases.

[@criticalnurse-ready8705]

Hello Sir. Do you have an email i could contact you from. I have some questions regarding home solar wiring setup. I really look toward your reply.

[@marvnet8898]

What is the difference between "station" and "substation"? Why sub?

[@matthopper1925]

A power "station" usually refers to the power plants where power is generated, which also step up the voltages for transmitting the power over longer distances (higher voltage reduces power loss). In order for us to get the 220V/120V that we use at home, the voltage needs to be stepped back down nearby at these power "substations."

[@jamesmhango2619]

@@matthopper1925 So what's the difference between a Switch yard and a substation considering the fact that you sound Anerican.?

[@zachary_smith1]

@@jamesmhango2619 Substations always have a transformer and circuit breakers, switchyards typically dont have a transformer and are mainly just switches, bus, and transmission dead ends etc. Switchyards just move around the power and substations change the voltages.

[@ericstark626]

It is rather simple. A station is the FIRST transformation (trafo) station after transmission. All the consecutive trafo stations (Distribution) are SUBstations.

[@luminousfractal420]

Just last night watched a vid of a guy with half a subststion in his living room doing a giant jacobs ladder, where theres a will😂

[@albertwashingtonjr2089]

Not trying to be a critic, but I think you have something confused. The part you are calling "regulators" look more like OCBs (Oil Cooled Breaker) and might have a regulator on it. I'm no expert, but I work in the field - R&C designer - and the part you identify as a CB (Circuit Breaker) is actually a recloser switch but they do not have bus bar connected to the bushings, looks like cable to me. Good video though and like how you point things out so even the untrained eye can see it.

[@adanner]

Thank you for the comments!

[@turdferguson8612]

If you are going to attempt to correct people you should make sure you know what you are talking about, OCB-Oil Circuit Breaker and they are in fact voltage regulators.

[@luminousfractal420]

​@@adannercorrect the vid 😂

[@stanley4006]

@@turdferguson8612sorry to break it to you but they aren’t voltage regulators. Circuit breakers protect against overloads or short circuits. Voltage regulators are to change voltage when the demand changes. So during high load the voltage will drop, the regulator will change taps to boost the voltage and then when the demand goes down and voltage rises the regulator will adjust the tap to keep the voltage at the set level. A Voltage regulator is typically far from a substation, typically in rural locations.

[@ikpalian4413]

​​@@stanley4006is voltage regulator also known as OLTC typically No! Voltage regulator is actually use for protection relay that is under voltage or over voltage protection, also Voltage Regulation: Maintains a constant output voltage level of a transformer, enhancing equipment performance and longevity and suitable for High Power Applications: While OLTC ( on load tap changer) is for adjustment of load demand when sudden voltage Change occur without interrupting power supply and can be done automatically or manually.

[@user-gl9iz1bp1r]

Metcalf snipper attack.

[@nhitc6832]

Imagine crash into one of these station😱😱😱.

[@marksmadhousemetaphysicalm2938]

What is the difference between a reconnecter and a recloser? 🤔🤷‍♂️🤷‍♂️🤷‍♂️🤷‍♂️🤷‍♂️ not being critical, I just don’t know enough…I’m enough of an electrical nerd to want to know the difference…

[@SodiumInduction-hv]

recloser is like an automatic resetting breaker

[@6Diego1Diego9]

nerd alert

[@ck3082]

this sounds like a great video for the people going around destroying substations wtf is this an Op

[@captainirshadkhan3062]

Sir hope you are doing great Kindly send me your email Id sir

[@ck3082]

i bet u want it eh

[@rasakiolawoyin5330]

Great and highly informative videos. Thank you Prof.

[@rasakiolawoyin5330]

Great and highly informative videos. Thank you Prof.