Thanks for the great information on the Variac . I use an old one for a speed reducer for mixing mortars and drywall compound , I had to repair the cord; but once I opened it , then I had to know more. Thanks.
hello nice video question if I had a stove that kept tripping the breaker could I plug up the variac set it at 220v and plug up my stove. would the variac handle the load instead of the breaker thus keeping it from tripping? If you still respond to this channel thank you for any answer.
I can answer that. However the first question you must ask is why is the stove tripping the breaker? If it's a 220v stove, the breaker will be large and will most likely be two breakers with the switch throws bracketed together. (This is because 220v circuit is actually two 120v lines with each on different phases.) Normally the breaker should have more than enough capacity to handle whatever you could possibly plug in appliance wise. So, 1. You're somehow overloading the circuit. With too many large appliances together on the line, drawing current above the breakers rating. (Not likely) 2. The breaker is defective. Breakers aren't meant to be switches and if used often as such will wear out. But the most common way breakers begin tripping early (before their rated amperage) is if they have been over loaded and caused to trip too many times. The spring contacts get "tired," from the heat caused by over loading and the springs become weak and thus easier to trip. (Replace breaker) And or.... 3. The breaker is right. There is a fault or a short in the stove causing it to over draw amps and trip the breaker. You MUST investigate this possibility! Unless you want to burn your house down or get electrocuted. Lastly, no you cannot connect any kind of transformer to bypass or avoid the breaker tripping. The stove is gonna draw what it wants/needs power wise. So by using a transformer to feed the stove and not trip the breaker,, you would have to feed it far less amps than it needs to work. Basically the current would still need to be drawn one way or another. Ohms law states that there is a direct linear relationship between the voltage, amperage and resistance of a circuit. You can't cheat it, it's law. Email me with further questions. sadiegualla@gmail.com -Rex
VERY consistent and thorough in AC as I use this as an INDUCTIVE means to PROPEL or DEDUCED logical steps or steppers as to keep the CONSTANCE alive or live within a DISTRIBUTED CIRCUIT or DC ...
I have a new box fan that does not accept the 124 volts that Con Edison is supplying. I want to use this to lower the voltage for that fan. Will it cut down the wattage used?
I have heard about Variac for a few years now but never really knew what it was. Thanks for explaining it in your excellent video! I’m a home coffee roaster and I have a few electric roasters. All the manufacturers say never use an extension cord or an outlet that has anything else running on it so you get full power to the machine. Well my one outlet in the garage is on the ceiling and I know there are other things on that line. I am forced to use an extension cord and I can tell I’m definitely not getting full power to any of my coffee roasters. Can I use a Variac in my situation to get full power to my machine??? Thanks!
A Variac can go to a higher voltage than what you put in. My UK 2000 watt 240 volt one will go to 260 or so, maybe 300 volts so it should compensate for resistance in the cable. But you need enough power to run the coffee roasters otherwise they will only draw as much current as they can get !!!!! If you have other high current devices you need to use a 30 amp Cooker Circuit like I do with my 4KW Arc Welder. You need 30 amp fuse and very heavy 16 amp cable, but the Variac is only 2000 watts. How much current do the roasters use ??? I should think a lot !!!! The Variac won`t go above 2000 watts !!!!!
I'm using a variac to reduce line voltage for a vacuum tube stereo amplifier. My variac seems to be humming and I'm getting hum through my amplifier. Got any input on this?
+TEMCo Industrial Power Hi. As you said that with a increase in voltage current decreases, but here when you use the heater gun or bulb, with increasing voltage the appliance runs with greater intensity. Now theoretically current should reduce with increased voltage, doesn't it mean that that appliance should go less intense as the current is reduced due to increased voltage. Please I dont get that part???
I use a variac for an extraction fan and works very well. However I would like to know if that when it is turned down does it use less electricity? I know volts and wattages are different. So by turning the fan down with a variac, does it use less electricity or does it use the same amount of power and just turns the spare power to heat?
No. It does use less electricity, that is less intensity of the current, and then less spent. It is said that it reduces the voltage by increasing the current, that is correct but had to say that it increases the current in the output which is fixed for an output voltage and the impedance you connect, (for a lower voltage you have less current with the same fan) and then you go back to the primary and there is less intensity of current than in the secondary given by the ratio of the transformer
I have the coil and bial with the wiring board hooked to it on the platform . what i need is a diagram so i can hook up the power cord the on , off switch, the fuse , the voltage gage , and the plug outlet. Do you know where i can get a diagram for that . it would be very helpful to me . thank you .
Hi, I notice some obvious noise in the video as you are demonstrating the output on the heatgun. Would this be obvious used in-line say for a guitar amp? or it this just interference with your video recording equipment?
We no longer manufacture Variacs but, yes, you can do exactly that very easily. You could also use a standard 0-130VAC model and just limit to below 24. As you suggested, adding the rectifier gets you the DC you need
Hi,I would like to use a vaiac on a homemande plastic sheet bender. I would like the bend 60 inches wide 3/16 polycarbonate with nichrome wire (20, 22 or 28 GA) what would you recommend?Thanks
I have a question for you, I have a 220 V variable transformer rated at 4 amps output . Here is my question that nobody seems to have an answer for, if I was to run this same variable transformer on 120 Volts what would be the output amperage now. We know that there is a mathematical formula to figure this out, it's over our heads, hope you can help. As always I will take the answer in the comment replies. THANKS.
Thanks for the great information on the Variac . I use an old one for a speed reducer for mixing mortars and drywall compound , I had to repair the cord; but once I opened it , then I had to know more. Thanks.
hello nice video question if I had a stove that kept tripping the breaker could I plug up the variac set it at 220v and plug up my stove. would the variac handle the load instead of the breaker thus keeping it from tripping? If you still respond to this channel thank you for any answer.
I can answer that. However the first question you must ask is why is the stove tripping the breaker? If it's a 220v stove, the breaker will be large and will most likely be two breakers with the switch throws bracketed together. (This is because 220v circuit is actually two 120v lines with each on different phases.) Normally the breaker should have more than enough capacity to handle whatever you could possibly plug in appliance wise. So, 1. You're somehow overloading the circuit. With too many large appliances together on the line, drawing current above the breakers rating. (Not likely) 2. The breaker is defective. Breakers aren't meant to be switches and if used often as such will wear out. But the most common way breakers begin tripping early (before their rated amperage) is if they have been over loaded and caused to trip too many times. The spring contacts get "tired," from the heat caused by over loading and the springs become weak and thus easier to trip. (Replace breaker) And or.... 3. The breaker is right. There is a fault or a short in the stove causing it to over draw amps and trip the breaker. You MUST investigate this possibility! Unless you want to burn your house down or get electrocuted. Lastly, no you cannot connect any kind of transformer to bypass or avoid the breaker tripping. The stove is gonna draw what it wants/needs power wise. So by using a transformer to feed the stove and not trip the breaker,, you would have to feed it far less amps than it needs to work. Basically the current would still need to be drawn one way or another. Ohms law states that there is a direct linear relationship between the voltage, amperage and resistance of a circuit. You can't cheat it, it's law. Email me with further questions. sadiegualla@gmail.com -Rex
@@ripstephenhawking8787 I reaallly appreciated that answer stranger and yes I will be asking so look for me
VERY consistent and thorough in AC as I use this as an INDUCTIVE means to PROPEL or DEDUCED logical steps or steppers as to keep the CONSTANCE alive or live within a DISTRIBUTED CIRCUIT or DC ...
really descriptive, enjoyed it
Variacs are available in thousands of sizes.from hundreds of manufacturers and have NOT been discontinued.
I have a new box fan that does not accept the 124 volts that Con Edison is supplying. I want to use this to lower the voltage for that fan. Will it cut down the wattage used?
Very clearly explained. Thank you.
Do the watts drop with the drop in volts?
Hi, great info on this I would like to ask do you make one that has 110 volts AC input and 230 volts AC output with a USA plug?
Hello sir.. Can I use variac on welding works to maintain the power supply from my generator?? Thanks.
I have heard about Variac for a few years now but never really knew what it was. Thanks for explaining it in your excellent video! I’m a home coffee roaster and I have a few electric roasters. All the manufacturers say never use an extension cord or an outlet that has anything else running on it so you get full power to the machine. Well my one outlet in the garage is on the ceiling and I know there are other things on that line. I am forced to use an extension cord and I can tell I’m definitely not getting full power to any of my coffee roasters.
Can I use a Variac in my situation to get full power to my machine??? Thanks!
A Variac can go to a higher voltage than what you put in. My UK 2000 watt 240 volt one will go to 260 or so, maybe 300 volts so it should compensate for resistance in the cable. But you need enough power to run the coffee roasters otherwise they will only draw as much current as they can get !!!!! If you have other high current devices you need to use a 30 amp Cooker Circuit like I do with my 4KW Arc Welder. You need 30 amp fuse and very heavy 16 amp cable, but the Variac is only 2000 watts. How much current do the roasters use ??? I should think a lot !!!! The Variac won`t go above 2000 watts !!!!!
Hi,
Great explanation.
I linked your video to my Custom Home-Made Variac video (in the description box).
Yes, it can be operated continuously.
I'm using a variac to reduce line voltage for a vacuum tube stereo amplifier. My variac seems to be humming and I'm getting hum through my amplifier. Got any input on this?
as you increase the voltage does the current comes down and vice-versa as in a normal transformer?
Yes, that is correct.
+TEMCo Industrial Power Hi. As you said that with a increase in voltage current decreases, but here when you use the heater gun or bulb, with increasing voltage the appliance runs with greater intensity. Now theoretically current should reduce with increased voltage, doesn't it mean that that appliance should go less intense as the current is reduced due to increased voltage. Please I dont get that part???
I use a variac for an extraction fan and works very well. However I would like to know if that when it is turned down does it use less electricity? I know volts and wattages are different. So by turning the fan down with a variac, does it use less electricity or does it use the same amount of power and just turns the spare power to heat?
No. It does use less electricity, that is less intensity of the current, and then less spent. It is said that it reduces the voltage by increasing the current, that is correct but had to say that it increases the current in the output which is fixed for an output voltage and the impedance you connect, (for a lower voltage you have less current with the same fan) and then you go back to the primary and there is less intensity of current than in the secondary given by the ratio of the transformer
I have the coil and bial with the wiring board hooked to it on the platform . what i need is a diagram so i can hook up the power cord the on , off switch, the fuse , the voltage gage , and the plug outlet. Do you know where i can get a diagram for that . it would be very helpful to me . thank you .
Why the power cord coming out the front?
Thanks for this video explanation.
Hi,
I notice some obvious noise in the video as you are demonstrating the output on the heatgun. Would this be obvious used in-line say for a guitar amp? or it this just interference with your video recording equipment?
Could using a variac on powertools cause damage to them? Like running an angle grinder on lower voltage than it was designed for.
John Fraser no
will dropping a fans voltage with a variable transformer ultimately save on electrical cost
On single phase, probably not. Three phase motors can often benefit from being slowed down to run at an optimum RPM.
Yes, I think it will do save costs
Can you build one of these that only goes 0 to 24 Volts AC, and can you rectify and filter the voltage to drive DC model train motors reliably?
We no longer manufacture Variacs but, yes, you can do exactly that very easily. You could also use a standard 0-130VAC model and just limit to below 24. As you suggested, adding the rectifier gets you the DC you need
Very nice tutorial!!! Great examples and theory
sir can we apply this for 1/2 Hp ac motor
can this product be continuous operation?
Hi,I would like to use a vaiac on a homemande plastic sheet bender. I would like the bend 60 inches wide 3/16 polycarbonate with nichrome wire (20, 22 or 28 GA) what would you recommend?Thanks
Good video
I have a question for you, I have a 220 V variable transformer rated at 4 amps output . Here is my question that nobody seems to have an answer for, if I was to run this same variable transformer on 120 Volts what would be the output amperage now. We know that there is a mathematical formula to figure this out, it's over our heads, hope you can help. As always I will take the answer in the comment replies. THANKS.
Thanks for the awesome video! Can I use a variac on a water pump to modulate water flow?
Hi : Can I use the variac to change power given from 220V 12 amp system to 30-40amp system giving 8500k watt power to heat water in very cold weather
No. Variacs can drop voltage, but they cannot increase the available current.
Darn. Had me all worked up to get one and it's already discontinued. What was the reason?
I noticed today this product has been discontinued. Do you have a new product as replacement for this?
We do not have a replacement for this at this time. eBay may be a good place to find a similar model.
I just realised, my house has one of these variacs inbuilt next to the light switches.
nice vid. :)
Approximately 500 W.
so isnt a variac just doing the same as a simple light dimmer?
a light dimmer produces very noisy ac power. a variac introduces zero noise.
Blame it on the bass player.
april 2024 😃
bollard