Timeline for Why do our electrical utilities use transformers way over their rated KVA?
Current License: CC BY-SA 4.0
18 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Mar 30, 2021 at 18:01 | comment | added | Ben Collins | The link to the whitepaper is broken. | |
| Oct 22, 2018 at 7:51 | vote | accept | Nick Williams | ||
| Oct 19, 2018 at 8:29 | comment | added | Vladimir Cravero | @PlasmaHH here natural gas is used for cooking and heating, and my vac is probably 500 W worth or something like that :) but I do not have a workshop at home | |
| Oct 19, 2018 at 6:02 | comment | added | PlasmaHH | @vladimir what? How are you cooking a meal? My stove with everything on draws 8kW, my kettle almost 2kW, even my old shop vac about 2.3kW ... | |
| Oct 18, 2018 at 20:03 | comment | added | Vladimir Cravero | @PlasmaHH where I live, the standard non commercial electricity contract provides a maximum of 3 kW. I cannot possibly imagine what I would do with 10 times that... | |
| Oct 18, 2018 at 18:22 | comment | added | Nick Williams | @PhilG, I commented below on Dan's answer. It's definitely large trash-can sized, and now that I've actually seen a photo of it for myself, it's definitely 25 kVA, not 2.5 kVA. The utility worker verbally told my Dad the wrong thing. | |
| Oct 18, 2018 at 17:28 | comment | added | PlasmaHH | @vladimir 600A Times 120V is 72kW, not that excessively much. I have 63Ax3x230V 43.47kW in a home that doesn't heat with electricity nor has it an AC unit. | |
| Oct 18, 2018 at 17:07 | answer | added | Dan Mills | timeline score: 2 | |
| Oct 18, 2018 at 16:52 | answer | added | D.A.S. | timeline score: -1 | |
| Oct 18, 2018 at 16:45 | comment | added | Phil G | What size is the transformer? If it's about the size of a trash can it's not a 2.5kVA transformer, that'd only be about a foot cube. | |
| Oct 18, 2018 at 16:45 | comment | added | Adam Lawrence | Pictures of the ratings labels/stamps would help a lot. | |
| Oct 18, 2018 at 16:06 | comment | added | Nick Williams | Note: I think his transformers are labeled using some weird system, because those kVA ratings just don't make sense. 2.5 kVA isn't even a standard size residential transformer (though 1.5 kVA is a standard size). But 15 and 25 kVA are both standard sizes, and would be undersized by the same amount (about half) as my 37.5 kVA transformer. So I think his old transformer was actually 15 kVA and his new one is actually 25 kVA. Half the necessary size still seems awfully small. | |
| Oct 18, 2018 at 16:04 | comment | added | Nick Williams | I very much mean service amperage. My dad's main service cutoff is currently a 200-amp 120/240 breaker. It's getting upgraded to 400 amps. His house was built 30 years ago. My house was built 2 years ago. Its main service cutoff is a 600-amp 120/240 breaker. Those are not model numbers. (He has a big house and MULTIPLE outbuildings sharing that service. I will also eventually have MULTIPLE outbuildings, so I sized my service accordingly. We live on farms.) | |
| Oct 18, 2018 at 15:59 | comment | added | Janka | I pretty much guess these "600A service" ratings date back to the time of Edison, when grid voltage was 55V. | |
| Oct 18, 2018 at 15:57 | comment | added | Vladimir Cravero | Hi, welcome to EEsx. Can you clarify what you mean with "600A", "200A" and so on? I understand you interpret this as the transformer rated current, but I suspect that it actually is a model number of some sort. I highly doubt that you will ever need 600 A of current in any domestic environment, thus my doubts. | |
| Oct 18, 2018 at 15:56 | history | edited | Nick Williams | CC BY-SA 4.0 |
Corrected a typo in the size of my transformer.
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| Oct 18, 2018 at 15:50 | review | First posts | |||
| Oct 18, 2018 at 16:03 | |||||
| Oct 18, 2018 at 15:48 | history | asked | Nick Williams | CC BY-SA 4.0 |