I have a friend who brought her 110v TV from the US to Europe when ahelpful neighbor plugged it straight into the wall. 220volts. Is there any chance he did not damage it? Is there any chance he only blew a fuse? Does this tv even have afuse? I googled for a schematic for it, didn't find a schematic, butdid find a video of someone checking that very model (I don't have thelink handy), finding one of the soldered in fusible resistors to beblown, and replacing it. He didnt' say it was blown by 220 volts orgive any reason why it broke. Believe it or not, I take a screwdriverand a VOM with me when I travel, and I'm willing to buy a soldering ironand solder, if that will do it. It would save her a lot of money,boost her image of me, and boost my ego. It's a Toshiba 40RV525U made in 2008. 2008. 2.75 amps max. She's not stupid at all but it's been months since this happened and Ithink she's forgotten some details. The story is that her cousin'sfriend checked it out and decided it was fine and just needed atransformer. Internal? I dont' think so, so he must have meant a 220 to110 transformer** but I may not be able to talk to him directly becaausehe's old and does not speak English. **But if that's it, why didn't myfriend try it when she got the TV back. She says she has 2 of them forother appliances and just about any commercial step-down transformerwill power 2.75 amps, right? I thought she said he took it apart, butnow she says he didn't, so maybe he was just assuming it wasn't brokenand giving the generic answer when people ask about 110 volt appliances.She's going to call him again, or maybe she said call her cousin. She lives about 90 minutes from where I'll be. I expect to visit atleast a ccouple more times anyhow, but I'd like to come prepared to dothis in the minimum number of trips.

On Thu, 24 Feb 2022 01:01:44 +0200, micky wrote:Power supply on ebay shows a fuse in the photo : John T.

Can one plug a 110v tv into a 220 v outletl without doing any damage?

bruce bowser 3 years ago

Not for me. I've accidentally used 120vclips at the panel between a phase and neutral and not had anything happen.

Sometimes at peak, sometimes not.

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bruce bowser 3 years ago

120/208 is usually OK for 120v. 208v merely lacks a neutral, but its OK. And many panels have current-limiting fuse capacity.

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Mark Lloyd 3 years ago

for x/y, y = 2x * sin(120)

That also works with 277/480

The voltage marked on my AC outdoor unit (made in 2013) is 208/230

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TimR 3 years ago

We wired a housing area with 120/208 because we got a good deal on a bunch of AC units that needed 3 phase. I guess anyway, wasn't my decision. But I got the angry phone calls from people whose clothes dryers took forever, and ovens heated slowly. I wouldn't put 3 phase anywhere I didn't have to (in the US) because of problems with harmonics.

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bud-- 3 years ago

I understand 120/s40 to be the "system" voltage - nominal voltage at the service.

And 115/230 (or maybe 110/220) to be the "utilization" voltage - at the equipment. Mark says his AC compressor/condenser is marked 208/230 (208 would be nominal system voltage - a violation of this convention, but I don't remember seeing 200/115).

In a "208/120" volt 3-phase system "120" should always be good for 120.

A "current-limiting" fuse is fast acting, and for high current faults melts and clears before the current reaches its first peak - the let-through peak fault current is significantly lower than with a slower fuse. Bussmann FRN fuses are common current-limiting cartridge fuses that fit in normal cartridge fuse holders.

Some large apartments have 208/120 3-phase coming in and 2 phases go to each apartment - 208/120. A 240V appliance on 208V will heat slower -

208/240=87% but the effect is squared - 75%. A relatively small buck/boost transformer can boost to 240. A 240V motor shouldn't be used on 208 unless the nameplate says 208/230.

Not obvious which harmonic problem. Some harmonics on different phases, which can be caused by power supplies, can add on the neutral instead of cancelling.

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trader_4 3 years ago

That's because that's 120V.

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