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Step up/Down Voltage Regulator

 
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handainc(at)madisoncounty
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PostPosted: Tue Jan 12, 2016 11:19 am    Post subject: Step up/Down Voltage Regulator Reply with quote

Don’t want to hijack a thread, but last week, while visiting a local salvage sales company, was looking a table full of Simran SMVS-300 (300 Watts) Step-up/Down Voltage regulators with built in circuit breaker. These appear to be brand new. Was standing there trying to figure for what they would be used as I studied one, and the owner walked by and told me to take it home with me. So I did, but have no idea how it would be used? Photos attached.
[img]cid:3CBD56B2-D8EC-4584-A371-DA868B11D8A8(at)MadisonCounty.net[/img][img]cid:61BBCC35-DAC3-4717-9FC2-4418D7CBB334(at)MadisonCounty.net[/img][img]cid:226A1059-893B-4DC9-AA9B-3AA6AEE89935(at)MadisonCounty.net[/img]
Quote:
On Jan 12, 2016, at 11:47 AM, Robert L. Nuckolls, III <nuckolls.bob(at)aeroelectric.com (nuckolls.bob(at)aeroelectric.com)> wrote:
At 10:05 PM 1/11/2016, you wrote:
Quote:
Power supplies have several different types of ratings, and most have no overvoltage protection in case the power supply regulator fails. One of the ratings is how much current (Amps) will it provide while maintaining the rated voltage. Ripple is a rating about how much the voltage is allowed to fluctuate while providing current. The fluctuation is normally at about 60 Hz (cycles per second) for older designs, however, the modern switching type power supplies may have ripple at many different frequencies that may or may not show up as a humming noise on radios, etc.
Here's my present value-choice for an AC mains ground power supply . . . http://tinyurl.com/zbn5g6m It comes with lots of approvals. There's no reason to suspect that the 'protective' features cited are not equal to the best we know how to do in that industry. . . . and it's tough to beat the price/performance numbers. This is on a part with a 20A switchmode supply I used to sell out of the 'Connection inventory about 10 years ago . . . but at 1/4th the price.
Bob . . .



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user9253



Joined: 28 Mar 2008
Posts: 1922
Location: Riley TWP Michigan

PostPosted: Tue Jan 12, 2016 2:11 pm    Post subject: Re: Step up/Down Voltage Regulator Reply with quote

It looks like it will convert 240 VAC to 120 VAC or vice-versa. The ad mentions a refrigerator, but 300 watts will not handle that.
http://www.220converters.com/store/p/69-Simran-SMVS300-300-W-Watts-Voltage-Converter-with-Stabilizer.html


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