I am a master electrician by trade and also abandoned underground mine explorer. I certainly don't know everything. I still learn something new every day. Trying to bring some new information and insight into some really interesting hobbies.
Primary plant engineer here. The SF6 breaks down when exposed to UV into its constituent gases. And they are bad for the environment. 26,000 times worse than CO2.
Beautiful, thanks for posting, two quick questions though if you could: where did you get the little jack and what is the second lever on the gearbox for?
Good catch on the Atlas explosives. At first they looked like they were in good shape until you showed the goop. I am sure that part of your video got the ATF's attention. While nobody is likely to find that case, that's a 'no no'.
What an absolute fantastic walk through video. It’s always been my dream to have someone talk me through substation equipment in real life. This is about as close as it can get. Cannot thank you enough. You got yourself a new subscriber!
Really want to join you on a mine exploration!!! Idk how to reach put to you otherwise but if we could message somehow that would be awesome!!! Spamming this in hopes you see one, sorry.
Here in Germany and Europe altogether every official shits his pants when you talk about flying drones close to substations or power lines... like a single small drone will surely cause a nation-wide power outage if it collides with a single power line.
With regards to power factor control, I have a good example of how this works based on a 120v. electric motor. This is a 2 hp motor that draws 12 amps line current with no load. By parallel connection of a 180 uf capacitor, my line amperage drops to about 3A. The capacitor cancels the inductive portion of the current drawn from the AC line by the motor.
Can you please tell me how to calculate, the fuses in the primary for a transformer 600 volts, 3 phases, 75 KVA? Primary Delta and secondary Why. Thanks.
As a part-time student of Electrical & Electronics Engineering, I have t three QUESTIONS Please. (1) Why are the Transformers "Humming" if there is no load on them? (2) Is it periodically required to change the Transformer Oil like the Motor Oil in an Automotive Engine Crankcase? May I assume Probably NOT since there is Normally NO Combustion? (3) What kind of Oil is required if it is Necessary to change the Transformer Oil?
1. The actual hum is the core laminations vibrating/moving. This is caused by eddie currents. 2. As long as nothing is wrong with the transformer, the oil will be good for 20 plus years. If there are issues, it can be "cleaned" and put back in. If there is a big failure, the oil is replaced. 3. It is clear and tasteless mineral oil.
20:45 cool stuff but unless its calibrated and maintained kind a useless. Just more alarms that people will lift and leave out of service. Send oil samples into a lab. Much better off then guessing if your sampling equipment is correct or not. I wouldn't be using that for tripping.
10:02 top right. Do not put shorting terminal blocks in any PT box. Those should be only used in CTs. Someone will put shorting screws in their and blow the ccvt up. Not sure if thats before or after the fuses in there or what but just don't do it. Ask me how I know. Don't tell people to use a screw to hold a sticky back. Rather not have another hole, someone will put a screw in the top. 10yrs no one will care if that sticky back is there. Just make sure you leave enough tail and mark your cables really well. Still doing maintenance on equipment from the 70s.
Curious QUESTION -- What is the likelihood of a Drone flying into a Switch, Transformer or other Device and causing "Arcing, Sparking & Shorts?" Is a Drone Safe to operate in the close Vicinity of a Substation?"
Good question, the drone is sort of a bird on a wire. Not much will happen, HOWEVER if the drone gets in between phases or the drone gets in between a phase and a ground, there will be an explosion!
When there is a set direction of power flow, the normal for a transformer will primary will be delta and the secondary will be wye. The wye connection on the secondary establishes the system ground point. With a conventional power plant, the generator will be wye connected, and the step up will be delta low, wye high. Distribution transformers will have delta high, wye low. Because wind turbine substations work both directions, they need to have a wye connection on both sides. As a generator source on the HV system, the high side needs to be grounded. The low needs a ground, as the wind turbine is usually a 3 wire source. The purpose of the delta tertiary is to establish the ground reference. Since the delta is connected start to finish all the way around the triangle, the sum of VAN, VBN and VCN is forced to be zero. The moment the voltage tries to change, a current will flow in the delta and re-establish the balance.
Many smaller ones add additional cables, terminations and testing. When you hit about 250MVA you start to swing to it being more expensive. A single 100-250 MVA transformer is more cost effective then many smaller ones. Less of a footprint too.
Great tour! About the SF6 gas, it's more of a greenhouse gas, not as much ozone depleting. It's about 24,000 times more potent as a greenhouse gas than CO2. The new gas is about 1/10 as potent as SF6 and doesn't last long in the environment.
