How to Wire a Buck Boost Transformer

electricalindus...
A buck-boost transformer can be used for low voltage application such as lighting,control wiring or anything that requires a 12,24 or 48 volts power supply.
buck-boost transformers can be used to obtain a proper voltage within a specified percentage.
Here is the pdf for verifying the requirements for buck boost transformers:
www.jeffersonel...
Buck-boost transformers are heavy and require good support.

[@debbieford8971]

You are wiring this transformer as a regular low voltage transformer. A buck or boost transformer has an ability to raise or drop voltage to change the supply voltage to the line of a piece of equipment after the transformer. This transformer can take the 120 volts supply and make it 96, 108, 132, or 144 volts. if you had 240 volt supply the output voltages are 216,228,252, 264 output volts depending on how you interconnect the secondary leads. This being said the rating of the transformer [ V x A ] is rated only on the differential voltage powered thru the transformer, the 12 or 24 volts used by the transformer.

[@Drhey23]

what if you use 208?

[@N153AX]

A few years ago, I was an apprentice working with a journeyman on a new coffee shop. Bldg was 208/120V and their fancy espresso machine reqd. 240V so off to wholesale supply and told counter guy we needed a buck/boost. The unit his computer said to give us said 32V on label, not 240V. J-man said this is wrong & cntr guy didn't know. I looked at label and figured it was giving the voltage to be added, not the final voltage. Hooked it up, and output was 240V...tricky labeling, or J-man brainfart?

[@electricalindustry]

Yes check the NEC 2008 210.9 for more info. There are many options available to change your voltages. This was a transformer that was pulled out of a job that was feeding low voltage 24 v lighting. Another sparky had chosen to do it this way. Thanks for your observation.

[@cabcorner1]

No it's not an auto transformer . It is a isolation transformer with a 120/240v primary and a 12/24v secondary . The primary and secondary can be wired in series to create an auto transformer for bucking or boosting voltage 5 percent or 10 percent . You can wire 2 transformers together in an open delta to boost 3 phase from 208 to 230v for motor applications . When you are only adjusting voltage 5 to 10 percent I believe you can increase the kva rating of the transformer times 10 . Very handy.

[@downtowngutter3875]

This is an isolation step down transformer not a buck boost

[@cabcorner1]

I just watched it again ,you do know that you can wire that for 240v primary and 12v secondary or 120v primary and 24v secondary ?

[@juz4kix]

cabcorner1 I was thinking the same thing.

[@b2gills]

If it only allowed going from 120v to 12v and 240v to 24v there would be only 4 wires. It could easily be wired to output 6v (wire it for 240v input, 12v output, connect to 120v source) and 48v ( wire it for 120v input, 24v output, connect to 240v source ).

[@spelunkerd]

I was going to guess that VA was a power rating, but that wouldn't make sense if it's 5 amps on the output side. These are great little seminars, I'll watch for the one where you go into more detail about VA.

[@cabcorner1]

The video made it sound like you had to wire it 120v to 12v and 240v to 24v.Watch it again.You are correct about the 6v connection but I would have to check the 48v connection with the literature from the transformer to make sure the coils are rated for 240v when wired in parallel .

[@dmsentra]

I see the manufacturers labeling as a huge problem with buck/boost transformers. Most label the 12v/24v as Secondary Voltage(Low Voltage here) when it is in fact the Voltage Change. I spent an entire weekend scouring the web and talking to a long standing electrician and a 35 yr electrical engineer (that neither knew about buck boost) and the labeling was the only real stumbling block to understanding them. Once I figured that out the kva rating achieved was from across the drop was a smaller hurdle and I only figured that out by a B/B on Schneiders' site that listed 37kva load and a 3kva label on the same unit.

[@electricalindustry]

I added a link to the buck-boost transformer s PDF for more information in the description box. Thanks for watching!

[@jcer85]

There is no videos showing how to increase voltage 208 to 230

[@ITIRICI]

They make them specifically for this voltage drop or increase that you mentioned

[@YVRSURF]

Is this not an autotransformer (typically 120, 240 or 480 Volts) and a relatively low voltage secondary (typically12, 16, 24, 32 or 48 Volts), buck-boost transformers are designed to be field connected as autotransformers. What you did was a total waste of money can get an xformer for so much cheaper for what you did. Where was the Buck-Boost these coils can be wired in so many configuration

[@N153AX]

Sorry, my comment was not clear. Yes, it was the correct autoxfmr for the application. I was trying to point out that the label said 208V low volts, 32V high volts...It did not say anywhere 240V high volts. My J-man thought the autoxfmr was the wrong one until I pointed out that the label was giving # of volts to be added instead of what the final voltage would be. Has anyone else seen labeling like this?

[@vfpaintjobs]

I'm hooking up a 7.5 horsepower air compressor and I need to be at 2:40 which I'm running off of generac 22,500 starting in 15,000 running which gives me 240 volts but they're saying this actually 208 I'm trying to boost to 240 will this box do that for me?

[@michaelhinchey]

Hi I need to buck down from 237v to 220v for a pneumatic elevator. The sales man stated I need this same transformer 416-1131-000. I feel that I would need a 16/32 secondary transformer to get me to 221v ac. What do you think?

[@bluenation6379]

hello, did you figure it out. i need help with it

[@TomsOutside]

This video is pretty much a waste of time. Buck Boost says it all, while it will definitely work as a step down transformer that is not its primary use. It works as an auto transformer and is used to raise voltage by percentages, if your smart enough to connect it, many electricians never seen one, This video doesn't come close. How about connecting H1 to X1 and load, H2 to H3 connect L2 to H4and X1, connect X2 and X3, and X4 to Load as far as it doesn't matter which lead you connect to H1 and H4 if we are looking for the wave formation is it zigging or zagging, Very little info shared in this video for all the time used.

[@hankkline7300]

This is a step down transformer. It is not an auto transformer. An auto transformer has one winding with many taps like a multi-voltage HID ballast.

[@MrCinimod93]

so if you were to wire it up for 240 in and 12 out but only put 120 in would you get 6 volts out

[@prashantmadan2106]

What is the difference in buck boost transformer and buck boost converter?

[@fngmillet9381]

Been looking for wiring diagram How to make 235v from 208v All I see is 208v to 240v Customer was told needs to be 235v

[@SamTheBouncer]

It’s ok to wire for 240v and use for 235v

[@jmcrate]

@@SamTheBouncer Agreed, +/- 5VAC is nothing, it will run up or down 5V no issues.

[@nema9453]

So since its a 240/120V Input and a 24/12V Output does this mean its a Ratio of 10 to 1 transformer (10/1)???

[@GalaXy808]

What it does.this thing?

[@meerscan9101]

who makes those wire strippers with crimpers?

[@TutorialsforYouAll]

+refrigeration tech www.amazon.com/Gardner-Bender-GST-70M-Circuit-Stripper/dp/B000NGTMWS/ref=sr_1_3?ie=UTF8&qid=1454416620&sr=8-3&keywords=Circuit+Alert

[@GalaXy808]

Why do we need that.? Explain please!!!

[@guloguloguy]

IT SEEMS THAT THIS IS MERELY A TYPICAL STEP-DOWN TRANSFORMER WIRING. WHAT MAKES A "BUCK-BOOST" TRANSFORMER WIRING DIFFERENT?!...

[@hankkline7300]

When you wire the secondary in series with the primary it will reduce (Buck) or increase the voltage (boost) dependimg on the polarity.

[@CM-oy2kd]

Wow. That god seimans made power supply

[@jeffreymckie3328]

There was no buck connection made in this video. If this guy doesnt know what he is doing he should stop