Nudging mains voltage up or down.
Added 2018-10-13 01:37:02 +0000 UTCIf you ever have a problem with overheating on a traditional transformer, motor or tungsten lighting application you can sometimes reduce dissipation by nudging the supply voltage down a bit.
https://www.youtube.com/watch?v=ZEFVNFyG9po
That can be done by using an ordinary transformer to adjust the voltage up or down by the output voltage of its secondary.
The slight blip in this video where I was getting a low voltage on the secondary was due to corroded connection in the transformer terminals.
Comments
5.40 by the way hehe
Neil Tonks
2018-10-15 03:08:24 +0000 UTC2.20 oh my! That passed right by me. Although the the action of the crimp tool however didn't ..lol
Neil Tonks
2018-10-15 03:07:07 +0000 UTCIt doesn't matter which leg the secondary winding is put in. I used the neutral to link across for safety so I didn't have a live wire hanging out when showing the lamp lit.
Big Clive
2018-10-14 15:04:50 +0000 UTCon your drawing you loop L through the secondary side but when you show it you loop N through the secondary. does it matter which one it is?
Tsia
2018-10-14 11:42:56 +0000 UTCOn power distribution transformers I'd expect the winding polarity to be standardised, but I'd still probably check.
Big Clive
2018-10-14 05:51:00 +0000 UTCActually, it’s not quite trial and error if you know whether the transformers are additive or subtractive polarity. ANSI standard labels leads as H1,H2 and X1,X2. If you face the secondary side (X1,X2) the H1 bushing should always be on your left. If the X1 bushing is also on you left the unit is subtractive. Otherwise it’s additive.
Bill Browning
2018-10-13 21:07:04 +0000 UTCIt would be interesting to see the effect it has on a toaster in the voltage boosting configuration. We miss our old early 1980s toaster that toasted bread in about a minute, great when preparing lots of BLTs. Every modern toaster after that takes several minutes to toast the bread. I think our original one was rated 1000W, whereas the modern ones are around 700-800W.
Seán Byrne
2018-10-13 18:59:34 +0000 UTCThis one came from eBay. They do four jaw and six jaw versions plus a cheaper and simpler plier version. Keep in mind that these are for bootlace ferrule crimps. <a href="https://www.ebay.co.uk/itm/302914468677" rel="nofollow noopener" target="_blank">https://www.ebay.co.uk/itm/302914468677</a>
Big Clive
2018-10-13 16:32:08 +0000 UTCThat's a rather nice idea for a crimper, I wonder how much it... *looks up Farnell* ... THREE HUNDRED WHAT NOW???? Jaysus. Think I might have to stick to the blunt-snips model of crimpers for a while...
Mark Dennehy
2018-10-13 13:17:04 +0000 UTCExcellent, one of those times you know all the elements but never thought of putting it together in that way. One of the bits that fascinate me is electrical transmission in large railway locomotives where they do all sorts of tricks like this with motors and generators <a href="https://en.m.wikipedia.org/wiki/Booster_(electric_power)" rel="nofollow noopener" target="_blank">https://en.m.wikipedia.org/wiki/Booster_(electric_power)</a>
Charleso
2018-10-13 09:55:25 +0000 UTCEvery day is a school day!
The Tinkering Shed
2018-10-13 08:05:13 +0000 UTCDAM well spotted
God 420
2018-10-13 02:13:25 +0000 UTCi see a mistake in tow you set up your circuit if you run say 750 watts the way you have it drawn you will cause heating of the transformer because the load will add to the magnetism you should put the 2 wingdings is series across the 240 line and the load across the 230 volt wind than the transformer will run much cooler
God 420
2018-10-13 02:03:43 +0000 UTC02:20 - I'm strangely aroused...
Daddy Bearcat
2018-10-13 01:45:04 +0000 UTC
