Under water transformer cook up

[DeusMalleus]

What books would you suggest for transformer design?

[RODALCO2007]

@DeusMalleus The J & P transformer. Published by Johnson & Philips LTD.

[DeusMalleus]

@RODALCO2007 I had checked out a copy of "The Practical Transformer Design Handbook" by Eric Lowdon, but it's out of print and costs $200+

I'll see if I can find the book you mentioned

[RODALCO2007]

@DeusMalleus look on ebay or local technical second hand book shops.

I got mine from Onehunga , New Zealand for NZ$25, US$ 20.

[unifiedlinux]

That's gross

[2932danger88]

what is the best way to start out with this stuff. what things would be good to study for a begginer. i have been watching photon's videos for about 2 years and now that he is gone temporaily, i thought i would ask you. thanks.

[RODALCO2007]

@2932danger88 Start with looking at safety as number 1.

Always unplug whatever electrical experiment you are doing, when touching the experiment. Use a shield in between you and camera, safety goggles.

Be aware of capacitors which can store a lethal charge.

[2932danger88]

@RODALCO2007 thanks. also, what type of componets such as transformers, would be good for just starting off? nothing big, just some small things for begginers. thanks

[0lMelhor]

electricity bill ftw

[mike4ty4]

What is all that wax from, anyway?!

[RODALCO2007]

@mike4ty4 That is the insulation wax melting of the paper in between the transformer windings.

[mike4ty4]

@RODALCO2007 Thanks for the answer!

[SINEKT]

Sweet! Electricity and water mix so well :P

[codenamegamma]

Its Dead Jim.

[MrBadacidradio]

i dare you to put your finger in it.

[maxey83112]

its making hydrogen lol

[CeleronS1]

Nice, video!

Iam thinking of puting some brushles motor in water and then load it.

[RODALCO2007]

@myryonspoof That is the varnish melting of the windings

[myryonspoof]

what are those wax trees formed by



[PPGCSuicide]

great test

[SpeakerFreak95]

MMMM...........Nothing like a tastey deep fried transformer, YUM! lol

[NONVOGLIONOMI]

3:25 From "cooked" to "roasted"

[RODALCO2007]

@NONVOGLIONOMI  LOL

[BarneySaysHi]

@RODALCO2007 You said "In remote rural areas 230 / 460 or 240 / 480 is used, phasing 180 degrees apart." But with 180 degrees that would be 2-phase, which is a bit odd in my view... Don't you mean 120 degrees with 3-phase?

[RODALCO2007]

@BarneySaysHi It is a split phase circuit. 1 phase 11kV or 6.6 kV transformer feed from 2 phases or 1 phase SWER (single wire earth return) at the HV side.

The secondary winding has 4 terminals and can be arranged as 2 x 230 Volts or 1 x 460 Volts with centre tap for single phase motors over 3 to 5 HP with cap start.

[rushymoto]

@BarneySaysHi He means a 3 phase supply with the voltage read between 2 phases. You would only need 2 phases for a transformer.

[bjtaudio]

Also, when you blow things up and drive them to destruction, it teachers you how thing behave under stress, and you can see how they fail. It make you a better engineer, as you become more aware of actual limitations of things.

[bjtaudio]

Did you know you can disassemble most of these Low voltage EI laminated transformers, and rewind them. If you have a junk box of various small transformers, but with not quite the right voltage or current you need for a project, you don't need to buy one, you can rewind an old one. I've done a few now, it does take hours to do thou but, it's fun.

[Nivicoman]

Nothing worse than the smell of burnt transformer. We had a 1 KVA control transformer in a test bench burn out because a load bank with a 115 volt 20 amp fan motor was plugged into that bench. After about 30 minutes it started smelling and the transformer burst into fire. The fuse that was intended to protect the transformer was a 30 amp piece. How someone came up with that is beyond me. The transformer ended up protecting the fuse.

[MEGAMITSIMAN]

thats interesting how does all that gunky stuff form??

[RODALCO2007]

@MEGAMITSIMAN That is insulation melting of the windings

[HDXFH]

those old transformers are cool i use them as power sources for various things

[RODALCO2007]

I usually keep them for power sources as well, but I have heaps of these TX's. so for this type of experiment one TX had to suffice.

[xXxmidgexXx]

i dont quite know about that electrical thing but there are wax in the TX? is it like some insulating wax like that?

[RODALCO2007]

It is wax on the paper layers in between the primary and secondary windings.

The windings are covered with a type of varnish

[DragonFlyback256]

Cooked wax anyone?

3:46 - LOL

[kdjfnvjvd]

holy wow that's very cool stuff. im not very knowledgable with electricity so i got a question..... What would happen if a person stuck their finger in the water just a little????

[RODALCO2007]

Don't !! mains voltages will kill. The bottle is an isolator so the water could be alive at full mains potential.

[Nivicoman]

@RODALCO2007 What is the highest voltage found in residences in NZ? I saw a post which someone stated 240/480 for larger residences and I found it hard to believe but it could be a matter of I2R losses and wire guage for air conditioning and lifts etc.

[RODALCO2007]

@Nivicoman In remote rural area;s 230 / 460 or 240 / 480 is used, phasing 180 degrees apart.

1 or 2 phase motors can be used on the higher voltages with less current draw.

[Nivicoman]

@RODALCO2007 Please excuse all the questions. I've had an interest in things electrical since age 6 and even then I was taking small springs and setting them bright red with a 6 volt lantern type battery like in your battery hack. Small permanent magnet motors found in battery operated toys do not like running on that 6 volts, they smoke out just like the 110 volt motor on 240 volts. And then there were the light bulbs such as grain of wheat, torch, indicators etc 3 or 6 volt.

[RODALCO2007]

@Nivicoman No worries. It is great to discuss electrical matters and please do ask if you are not sure.

Your experiments are similar when I was your age , I used 4½ Volts batteries in parrallel to get more current and glowed paperclips and small coils of thin wire.

The batteries didn't last too long with the excess current draw.

[Nivicoman]

@RODALCO2007 Like the US 120/240 split phase 180 degree shift. I imagine where 480 volts is used in a residence it would be well protected against someone coming in contact with it or having an explosive fault condition. I've seen what 480 can do-BOOM!!

To my knowledge US residences have 240 maximum some areas 208. 480 only in commercial buildings fed by a 13.2 Kv/480 transformer. The building caretaker at my work found out about 13.2 Kv on a Fluke 87-POW! He wasn't badly hurt luckily.

[Nivicoman]

@RODALCO2007 But as long as the person is isolated from Earth or another phase...... Just kidding I wouldn't test it. I've put myself by accident across 250 volts in a reel to reel tape deck power supply. Not the nicest sensation.

[steamboy51]

that transformer is surprisingly resilient!

[RODALCO2007]

It did surprise me too. Although the water cooling did help it to last longer.

[Nivicoman]

@RODALCO2007 The water couldn't penetrate between all the windings. If it did I bet they would have stayed cool and no wax/varnish bubbles would have formed. The transformer could have gone on indefinitely.

[laurdy]

you should try running one off DC

[Nivicoman]

@laurdy We have power conditioners that if one SCR in an inverse parallel pair fails the transformer will be energized by half wave DC and we've had some burn up the coil on the affected phase.

[daewooparts]

now throw some salt into its wounds