Nathan thanks for this terrific video. I recently bought a vintage General Radio variac, and this really helped me to set it up. Thanks again.
@AmbroseLiao
4 жыл бұрын
Thanks, Nathan. I have a Powerstat and your video couldn’t more perfect for me! 👍👍👍
@bradfordcouncilman3136
5 жыл бұрын
Thanks, Nathan. I just rebuilt an older Powerstat that looked like it had been run over with a fork lift. A combination of sheet metal work and wiring . Before flipping the switch I though I'd better seek confirmation . Thanks to you and KZitem.
@snaprollinpitts
9 жыл бұрын
hey thanks Nathan, great video, very good explanation. now I can hook up my W10 old General Radio the right way.
@englishrupe01
2 жыл бұрын
Thanks very much for your help. I was unsure about wiring up mine. Cheers!
@redneckways1933
Жыл бұрын
Thanks. You helped me greatly..i got mine working on frist try..mine has 7 places to hook up the wires.
@GeigerCounterVirtualMuseum
6 жыл бұрын
Thanks for the wiring explanation. I just bought one at a hamfest.
@skink356209
11 жыл бұрын
You could try ballasting it, i've heard it works quite well.I recently acquired a W20 Variac and a 50A relay, along with another 20A breaker, from ebay for 41 USD. Impressive had free shipping too. When I start using it i'll have it wired through the breaker but not use the relay, its on a rack mount so i'll probably remove the relay. Anyway, its pretty good deal for a 20A variac. quite impressive actually.
@janessagrant
5 жыл бұрын
Thanks its what i was looking for.
@CSSIandAssociate
8 жыл бұрын
Thanks for the excellent explanation.
@rosshollinger8097
4 жыл бұрын
Nice explanation, but get a tripod for your camera. I got sea sick.
@1miltond
7 жыл бұрын
Hi the # 4 and 5 connectors are the inversion for rotation of the selector from o to 140 V turning the selector to the left or 1 and 2 to turning from 0 to 140 v to the wright you can connect one way or the other depending on what you got the winding on the transformer is the same powerstat is a old brand variac is a new brand to some of the powerstat were stacks of 2 or 3 transformers in series look at the squematics on line
@Turbohh
2 жыл бұрын
nice job....just what i needed.
@BoomBoxDeluxe
12 жыл бұрын
Nice vid. :-) When you plugged it in, I noticed you have only a 2-pin plug on that. Should the variac's chassis be earthed? As I'm from the UK, I find it a little unusual to be using 2-pin plugs, as the only 2-pin plug permitted in the UK is a shaver/rechargeable toothbrush plug. All other plugs must be 3-pin to BS 1363 or the older, mostly outdated BS 546. If you're going to wire this & use it for real, I'd recommend earthing the chassis on it. :-) Thanks for showing. -BBD.
@PcrHV
11 жыл бұрын
Hey great job with your explanation!
@MikeGaglio
2 жыл бұрын
Great. Thanks.
@hichamtassi1753
2 жыл бұрын
Hello Nathan, in that case, both neutral and hot won't be in short circuit ? thanks
@TheMetalButcher
4 жыл бұрын
Thanks mate. I discovered I have a General Radio W20G3, triple bank 20 Amp variac. Apparently they go on ebay for aroundabout $500. I'm trying to decide if I should see it or if I may have a good use for it later.
@elihampton-brown7587
4 жыл бұрын
Excellent work !!
@fboo3232
9 жыл бұрын
I have a Powerstat 116cu (120v -10A - Open) very similar to the one you explained on the You-Tube Video. The data sheet on my powerstat is showing my connections with the knob on the Base End and CW to be: Power Input on 4-5 and Output on 3-4. I noted the know on your powerstat was on the radiator end and mine is on the Base End. Won't this make it OK to use the #5 terminal as the end of the toroid and the last section of the windings the over wind?
@elektro725
12 жыл бұрын
Here in the USA it is very common to have a 2 pin plug however many things here have a 3 pin. It probably would be a good idea to put a 3 pin on it but its not required.
@choppergirl6346
11 жыл бұрын
Meh, I'd put my hot on pin 4, because why would I want over 120 volts going into my device? To test it if it will fry with an over voltage. By setting it at pin 5, the end of the loop, there is no way I can over voltage my device, as my dial now goes from 0 to 100%, and if I want to go to either 0 or 100% without thinking, I can twist the knob full to the left or full to the right and hit the stop.
@Varianna12
6 жыл бұрын
this would have been my question. Who would want 140V?
@jawnlaughlin5
6 жыл бұрын
Because the input is 120 and the output is 140 more than likely...thats how mine is which goes up to 117 percent on the faceplate dial so at 100% you'll get 120
@kevinurso1944
2 жыл бұрын
Thank you, great info
@manwar999
10 жыл бұрын
well done
@skink356209
11 жыл бұрын
VERY helpful, as i mentioned i just got a new one (my first, actually) and don't know how to properly wire it, also will a 20A circuit breaker work to protect a 20A variac or should i downsize it to 15?
@elektro725
12 жыл бұрын
thats exactly who i made it for
@philready5334
8 жыл бұрын
I have one that looks like that. What make and spec is that?
@Alex1M6
12 жыл бұрын
Very nicely explained, was this for MrSciencetificsasuke by any chance? And what VA rating does that smaller one have?
@Alex1M6
12 жыл бұрын
Wow nice, where did you get your 3.5kva one from? I have been looking for a while now on ebay for a decent second hand one that can do around 15 amps and is 230v, but haven't really found any that were not like £500+.
@elektro725
12 жыл бұрын
I got the 3.5 KVA variac off of ebay new and someone gave me the 2 KVA variac.
@sand0077
4 жыл бұрын
Always good when the 'magic smoke' doesn't appear!
@SDCustoms
8 жыл бұрын
If I get a variac that has a 220v 2 phase input can I run a regular 110v motor off It? Looking to over powering things and I was wondering If thst would work... pkease reply you're my last hope on this!!!
@fishflock
7 жыл бұрын
If the motor is designed for 120V so is the insulation so the insulation my fail at a higher voltage. Keep a very close eye on current and heat. Don't excite the rating of your variac.
@SDCustoms
7 жыл бұрын
fishflock Thanks, I was actually looking for a better way to melt the insulation and burn up the motor lol!
@fishflock
7 жыл бұрын
It would be much faster to over-load the motor. Stall it some how or slow it down so its just turning. The effect is much more dramatic. Careful of the voltage though. Not only can it kill you, it will hurt the whole time your dying.
@snaprollinpitts
9 жыл бұрын
hey Nathan, I have a question, I wired my W10 10 amp General Radio variac the way you said, but the voltage scale is backwards. when it should be 0 volts its 140V and when it should be 140V its 0V any idea what I'm doing wrong. thanks mk
@elektro725
9 жыл бұрын
That's not something you did wrong, it's just how that variac is made. I have some that have the min and max voltages on the opposite side of the one showed in the video. It will work the same just remember which way will increase the voltage. You wouldn't want to forget and accidentally over volt something.
@snaprollinpitts
9 жыл бұрын
Nathan Fryar thanks, I'm wondering if the scale was meant for the other side?
@GadgetReviewVideos
7 жыл бұрын
snaprollinpitts I know it's a late answer, but better late then never I guess. On a 5 Tap 1 is the beginning or the end, and 4 is the beginning or the end. When it comes to how a veriac works their is no wiring backwards. So if you put the Neutral on 1, and the Live on 4 and the dial is backwards then just reverse the wires. Then put the Live on 1 and Neutral on 4 and the dial will operate as expected. All you doing is starting the flow of the power from the other side. Now if you do this be careful if you wire it to step up the voltage. Because the voltage is starting on 4 then your taps with 2 and 5 are reversed. So as he shows 2 is normally stepped up but if your Neutral is on 4 then your hot goes on 5 for stepping up. Do not put the Neutral on 4 and live on 2 without a ballast or addition capacitance or you will burn up and arc the transformer. But by doing this backwards Neutral on 4, hot on 1 for 1-100% and Neutral on 4 and hot on 5 for 1-110% step up the dial will now turn as expected. And to me having the dials turn from 0 to 100 is much safer when you own multiple veriacs this way all the dials on everyone of them act the same.
@pro.empire
Жыл бұрын
hey bro ho you set up Variable TDGC-3km
@johnzarollin2749
7 жыл бұрын
will you hold still, getting dizzy with the in-out, in-out stuff. Entire vid on 5 terminals and little on rest of circuit. try again.
@dohndunmire5603
6 жыл бұрын
Great video but where does the in and out grounds go??
@sweetguy19762
9 жыл бұрын
Nathan Fryar is a variac good for a lot of amperage if I need it for High powe experiments?
@elektro725
9 жыл бұрын
Like any other transformer of power supply you must size it according to your specific needs. You can buy higher current rates ones but they aren't as common. The red variac in the video is rated for 30 amps. Just make sure if you buy one that it is rated for what you want to do with it.
@sweetguy19762
9 жыл бұрын
Nathan Fryar ok thanks
@elektro725
12 жыл бұрын
This small one is 630 VA but I have a few more variac. I have one that is 2,000 VA and my biggest is 3,500 VA
@vianyzambrano235
Жыл бұрын
De Colombia, tengo uno igual, pero sería bueno un plano,diagrama,,,no se inglés,,,,no distingo la entrada de corriente y los otros dos cables😢😢😢😢😢😢😢
@cfgenth
6 жыл бұрын
Can I use one of these to control the speed of my single phase motor?
@kellyvcraig
3 жыл бұрын
Depends on the motor. You can vary the voltage of universal motors or brush type motors. However, you'd be better off looking into controllers designed for that because just dropping the voltage is hard on the motor, and you loose a lot of torque. Look at, for example, the router controllers. If you put a meter on it, you'll see the voltage stays the same throughout the dial positions. In spite of that, the motor does slow down. That's because they pulse the AC and vary timing of the pulses. Other controllers cut the amps.
@starcitizenmodding4436
7 жыл бұрын
Great vid. Maybe somebody can help me with this. i understand i could connect this to a fan and change the speed with the dial ,so if i had two normal transformers one that is 240v - 120v and one that is 240v - 60v for example. could i just use relays and have the fan speed controlled with buttons? or simpler just having a switch that swaps the input between the transformers?
@starcitizenmodding4436
7 жыл бұрын
Thanks for the reply im still learning and i find the fastest way is to ask stupid questions. thanks! so i guess ill just look into variable speed motors.
@cliffjones7868
4 жыл бұрын
Good explanation, but showing the connections you have on the floor is a no-no, safety is paramount.
@jidissafi7413
2 жыл бұрын
Same thing I was thinking. I know he's unplugged and all, but I cringed out of instinct every time his hands got near that thing.
@rocketmentor
4 жыл бұрын
what about 240 volt and 7 terminals??
@elektro725
12 жыл бұрын
I dont... maybe someday i'll make one
@fboo3232
9 жыл бұрын
Sorry I didn't spell Knob right in my previous comment.!
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