Electrical Substation Tour 

Yup, I like them a lot too.

Jesuswillsaveus 3 minutes on youtube

You mean no backup relays? I noticed that as well. They might still exist but be in remote cabinets too to keep them separated from the gear.

The relays are multifunction protection. Its likely just the Mains have redundant relays.

I think they are only talking L voltage not Primary.

Besides breaking in and being turned into an over cooked chicken strip when you contact one of the buses, nope.

vulcancritic not likely explicit, just a need to protect client confidentiality.

I like the first idea better; Leaves more to the imagination.

NateZermeno you can start by keeping your respectless mouth closed bud

I thought it looked odd too. In the UK distribution we generally run 132kV down to 33kV and the insulator sizes are very similar to those.

Same here in Australia

They might have designed the station for higher BIL for future conversion to a higher voltage. Or just designed with higher BIL as an insurance policy.

If its in California I think they use 66kV out there not 69kV like where I'm in the midwest. Also their 12kV is typically exactly that - 12000V nominal. Different voltage systems out there than in the midwest. California distribution started out mainly as delta so transfomrers were wound for 12000V. Over time, utilities like SCE have been changing over to WYE systems so you have 12000Y/6930V. Here in the midwest we used to have 7200V delta systems and then they were upconverted to wye systems, thus came 12,470Y/7200V. Existing transformer units were changed to be wye connected instead of delta.

69-13

cybhunter007 one of the benefits of wye distribution is that you only need to run one hot wire into residential areas (along with the neutral of course) while all delta systems consist of two or three hot wires on the primary distribution lines.

Lol engineers crack me up, all that book knowledge and no common sense.

How will you step down the HV DC? Transformers cannot work with DC power

@@aamirawan7998 You are almost correct. A regular AC transformer can't do it. You need what basically amounts to a switching power supply. I found a lot of info on this on Wikipedia: en.wikipedia.org/wiki/High-voltage_direct_current

maybe one day, but the amount of extra switching tech that is requiered is not effecient for those small substations, so they would stay ac forever and only the real "high-voltage" lines at hundrets of KV would be dc

Kam ke liye m,o 8960520747

Only in a windfarm

Power isn't on there yet. No need