Electrical substation videos

Electrical power is amazing and dangerous at high voltages. Electrical substation is a part of an electrical generation, transmission, and distribution system that transform voltage from high to low, or the reverse, or control the flow of electrical power. Substations may be owned and operated by an electrical utility, or may be owned by a large industrial or commercial customer. Generally substations are unattended, relying on SCADA for remote supervision and control. Here is a collection of videos on electrical substations:


Electrical Grid 101 : All you need to know !

Power Substation Overview

3D Animation of 33/11KV Substation (Outdoor Section)

Electrical Substation visit. Inside an Electrical Substation.

6 Electrical Substation Bus Schemes Explained

375 MVA Transformer – A quick look and energising

500kV substation equipment – A quick look

Broken Hill Substation

132/33 kv Substation overview

132kV Circuit breaker – A brief overview

ABB 145 KV SF6 circuit breaker

354KV Disconnect Openning

500,000 volt line opened under load

Electrical Substation Tour

How to Install the TripSaver II Recloser

Substations and Switchyards [PREVIEW]

50KVA distribution transformer 20Kv-400V

Isolator vs Circuit Breaker – Difference Between Isolator and Circuit Breaker

A practical working explanation of ISOLATOR-Dissconnector switch for 220kV switchyard

Isolator opening on load. All video

Difference between Circuit breaker and Disconnector/Isolator | Explained | TheElectricalGuy

Operation of Isolator With Earth Switch in Electrical Substation

Electrical Substations

Brazil-Argentina HVDC Interconnection

110 kV transformer switching on line

Sub Station Training

20KV High Voltage Transformer – Jaycobs Ladder demo


  1. Tomi Engdahl says:

    HV / LV Cable fault location

    A compilation video of cables going ‘bang’.

    These arc’s are struck in the course of cable fault location when pinpointing the faults using an acoustic discharge method.

  2. Tomi Engdahl says:

    AC substation grounding for safety

    This video provides a process to test and design a substation grounding system for safety. Some of the factors you need to consider in substation design include fault currents, surface coverings, power system configurations, and existing ground grid.

  3. Tomi Engdahl says:

    Underground Transmission Lines

    Georgia Transmission explains why high-voltage power lines are rarely installed underground: prohibitive construction costs, shorter life expectancy, and slower repair time during outages.


    Overhead lines change temperature faster, change temperature MORE, are exposed to wind, ozone, UV, water, ice and snow. They are exposed to MORE animals, especially squirrels and birds
    Loss-costs are, on average, 2.8% for underground, vs 37% for overhead.
    70% of line failures are weather-related, 11 percent are animals on overhead cables/poles/transformers…
    Underground cables bring those externality risks down by at least an order of magnitude!

    Overhead cables not being insulated or very thin insulation are kept cool by passing air, underground with thick insulations cables heat up when passing a lot of current for lengthy times thus resulting to very decreased life of the plastic insulation.

    Depends. Overloaded cables are affected by temperature, but the process is much faster than the life expectancy proposed on the video.

    At values below the nominal ampacity the isolation degrades because electrostatic phenomena.

    Anywhere in the US, as I know it, don’t allow underground transmission lines. I think it’s because of the big Electromagnetic Field (EMF). Underground lines tend to be below 20 feet below the surface. When we walk near or above one of those lines, we can be severely harmed by the EMF radiation.

    Overhead transmission lines running near houses causes leukemia in the people of those houses, especially kids.

    Under ground transmission lines can be shielded and made safer but the power company doesn’t want to afford the cost.

  4. Tomi Engdahl says:

    Installing Underground Wiring

    The steps Walton EMC takes to install underground electrical wiring to serve homes and businesses.

    Underground Cable laying

  5. Tomi Engdahl says:

    Underground cable in the National Grid – How it’s done

    A film about how Svenska Krafnät builds underground cables in the National Grid.

  6. Tomi Engdahl says:

    Underground Splice

    ComEd terminates a new three-phase distribution cable with a Cold Shrink Straight Joint. Host Utility: Commonwealth Edison.

  7. Tomi Engdahl says:

    How to Install a Recloser

    In Aurora, Illinois, just west of Chicago, a Commonwealth Edison crew installs a new G&W Viper ST recloser.

  8. Tomi Engdahl says:

    360 tour of The University of Manchester’s High Voltage Lab

    Hear Dr Vidyadhar Peesapati explain the work that goes on inside the UK’s largest ‘lightning lab’.


  9. Tomi Engdahl says:

    How The Power Gets To The Outlet

    How Do Substations Work?

    If you want to learn more about the kinds of wires you see overhead, we’d did that earlier. In fact, we had a whole series on the electric grid, smart and otherwise.

  10. Tomi Engdahl says:

    Electrical Bus-Bar And Its Types

    The most common of the bus-bars are 40×4mm (160 mm2); 40×5 mm (200 mm2) ; 50×6 mm (300mm2) ; 60×8 mm (480 mm2) ; 80×8 (640 mm2) and 100×10 mm (1000 mm2).

    The various types of busbar arrangement are used in the power system. The selection of the bus bar is depended on the different factor likes reliability, flexibility, cost etc. The following are the electrical considerations governing the selection of any one particular arrangement.

    The bus bar arrangement is simple and easy in maintenance.
    The maintenance of the system did not affect their continuity.
    The installation of the bus bar is cheap.
    The small substation where continuity of the supply is not essential uses the single bus bar. But in a large substation, the additional busbar is used in the system so that the interruption does not occur in their supply

  11. Tomi Engdahl says:

    Tomorrow’s Hydropower Begins With Retrofitting Existing Dams

    With wind and solar prices dropping, it can be easy to forget that two-thirds of the globe’s renewable energy comes from hydropower. But hydro’s future is muddled with ghostly costs—and sometimes dubious environmental consequences.

  12. Tomi Engdahl says:

    Elements of a substation
    A Primary power lines’ side B Secondary power lines’ side
    1.Primary power lines 2.Ground wire 3.Overhead lines 4.Transformer for measurement of electric voltage 5.Disconnect switch 6.Circuit breaker 7.Current transformer 8.Lightning arrester 9.Main transformer 10.Control building 11.Security fence 12.Secondary power lines

  13. Tomi Engdahl says:

    69 KV Substation – Walk through

    This video is a quick walkthrough of a very basic Substation. Most subs now have much more advanced equipment! None the less, all of the equipment is tested regularly and just as reliable in terms of delivering power to the customers. In fact often times, substation related problems are fewer and far between not having to deal with all the fancy equipment! I’d still much rather operate a breaker remotely then mess around with a high tension fuse.

  14. Tomi Engdahl says:

    Awesome Arcing, 400KV Isolator closing at night

    230 kv open switch failure

  15. Tomi Engdahl says:

    Energized Static

    We were working in an Entergy substation. I’m not a lineman, but I believe there’s half a million volts on each one of the three phases coming into the transformer. The sound you hear is the electricity trying to ground itself through the water vapor in the air. A lightning rod of a cell tower sounds similar when a thunderstorm is close. Nothing special, I just thought it was cool.

  16. Tomi Engdahl says:

    Unicoi Substation – Energizing New Transformer

    Erwin Utilities energizing a new transformer at the Unicoi Substation, October 2019.

  17. Tomi Engdahl says:

    Opening 230Kv Air Disconnect switch

    Awesome Disconnector Switching with ❙ Electric Arc (part 2)

  18. Tomi Engdahl says:

    Unitil Kingston Substation Expansion, Chapter 4 – Power On

    In 2013, Unitil embarked on a multi-year project to upgrade the infrastructure at an important substation serving the Seacoast NH service territory. The expansion and upgrades will accommodate load growth throughout the area and will free up capacity at other system supplies for the future.

  19. Tomi Engdahl says:

    All About Substations

    What does an electrical substation do? MVEC substation techs Bryce and Brent give you the inside scoop.

  20. Tomi Engdahl says:

    Working inside a Substation (138kv – 345kv)

    Hey Everyone!
    First thing I’ll get out of the way is, ONLY qualified people should be within the fenced area of a Substation unless accompanied by a trained representative for specific tasks. (Example: Snow removal). While every company has a different set of procedures and guidelines, I feel these 3 things are a good place to start. If ever you see something that you are not sure of … Stop and Ask. Don’t ever get yourself into a situation in which you are not familiar with the equipment you are working with.

  21. Tomi Engdahl says:

    Live Wire Demonstration

    Dominion Safety Experts travel our service area conducting live wire demonstrations for fire departments and emergency responders to alert them to the dangers of working around power lines.


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