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transformer

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  1. Carolina

    Finding transformer VA rating

    Hello everyone. I'm in training but we haven't seen transformers or how they work yet. I have a transformer here I'm trying to figure out. There are no labels or inscriptions on it. Primary side has 3 wires: black, blue (AC in), yellow (AC out?) and Sec has red and blue. Labeled USA 18AWG so a...
  2. Wolf865

    Landscape Transformer - Wrong Replacement!

    Father-in-Laws old landscape transformer went out so went to Home Depot to get a new one to install that had a countdown timer once the photocell turned it on in the evenings. What HD send me home with was an Intermec Mechanical Timer. Long story short, hooked up a 120V timer on a 12V system...
  3. R

    Repair a site transformer ?

    I'm repairing a 110 v 3 kva site transformer that the base cracked and all the sand leaked out, can anyone tell me exactly what the sand is there for and can I replace it with any dry sand or even just leave it out? The transformer won't be used on site but at home.
  4. M

    What kind of transformer is this?

    Hello everyone, I would like to know what kind of transformer is this so that I can buy a new one, I am attaching some photos. There is no writing on the transformer. It is located in a furnace for goldsmith use, in which there is a Crydom D2425 relay and a Fagor B40 C5000 / 3300 rectifier...
  5. E

    Voltage drop when transformer on site

    I've got what may be a stupid question but the only answer that I can come up with is 'because it says so in AS 3000', is there a reason why you only get 5% voltage drop when your transformer is on the site but not dedicated to the site? To me, the physics would suggest that it should be no...
  6. stanguy

    Monorail transformer recommendations

    Hi all, We have a monorail in the kitchen with 6 lights, currently 24v halogens (MR16 GU5.3). The transformer is tech lighting AT6024T. I want to replace the bulbs with LEDs, but 24v ac bulbs are hard to find. Any suggestions for replacement transformers so I can put in 12v bulbs instead? I...
  7. 51m0nb

    Can I use a 110v transformer in reverse?

    I am an experienced DIYer (build my own house etc) and I’ve offered to help a friend in France. However, all my power tools are 230v. Could I use a safety transformer in reverse to convert the local 110v to 240v?
  8. T

    Fully isolating output ground on Sola CSV Transformer

    Hello. I'm new here and greatly appreciate any assistance that more qualified persons can provide. I am a DIY person with some, but limited, experience handling transformers and other high voltage items in electronics. I have a deep respect for their potential to harm and I like to be very...
  9. Brqchi

    Can voltage transformer and frequency inverter replace frequency converter?

    Hi. I live in Kurdistan(iraq). I bought these four devices from the United States: @BLENDER: 120V, 50/60Hz, 12A @food dehydrator: 115V,50/60Hz,600W @food dehydrator: 110V, 60Hz, 1500W @Vacuum sealer: 120V, 60Hz, 1.06A As you know Iraq's power is 230V-50Hz, So I have to change the voltage...
  10. B

    Fridge transformer whines

    I have a wider range of hearing than most people. I can hear the transformer of my fridge when the compressor isn't running. It utterly torments me so I wear noise cancelling headphones all day, every day. Other refrigerators do this too and shops are too noisy and unhelpful to really test to...
  11. deliveryguyuk

    UK Required MCB for Doorbell Transformer

    Hi guys, I’ve just looked in my consumer unit and I’ve got space for an extra MCB and a rail transformer for my ring doorbell. I’m planning on adding a matching mcb however I don’t know if I need a 3A, 6A or 10A version. The transformer is British General Fortress 8-24V AC 8VA Bell...
  12. D

    New Transformer Humming Noise on Smart Doorbell 24 volt AC - How to fix this UK

    Hello All, Incase this reaches other non UK residents to confirm this doorbell has been fitted in England it regard to electricity distribution feeding the circuit This is the first I've posted and I'm certain many on here will have a good explanation and remedy for this problem. I've made...
  13. P

    Does Ring Transformer Need Fuse?

    Hi, I have recently installed a Ring Pro Doorbell. It has come with a transformer which is going to be connected to the lighting circuit as the CU is too far away. My question is, does it need a Fused Switch on the supply or can it be powered straight from the lighting circuit? Thanks
  14. O

    How to connect this toroidal transformer for a light fixture?

    Hi All, Hopefully someone knows the answer to this one. I have a toroidal transformer, which goes with a specific light fixture. However, when I purchased it (second hand) I did not get the install instructions. Attached are photos of the transformer, and the label, as well as the leads on the...
  15. P

    Ring Doorbell Transformer Location

    Is it acceptable to mount a ring doorbell transformer in a double back box with a flush cover / fused switch? I can’t get the wires back to the CU and don’t want a large box sticking out the wall. Thanks
  16. J

    Transformer replacement

    Hi, Hoping someone can help me. I have a transformer which has failed & needs replacing. Current one powers 3 halogen down lights. Ideally we would like to begin swapping to led lights. What could this be replaced with? Pictured is current one.
  17. F

    Neutral from secondary side of a transformer

    I had a question regarding the neutral wire on the secondary side of a transformer. When connecting H2 and H3 in series, H1 and H4 can be fed 480V to step it down to 120V. On the secondary side, I understand having to connect X4 and X2 together, and X3 and X1 together, putting them in parallel...
  18. B

    Current transformer metering producing implausible readings

    Edited - please read right to the end! Grateful for any advice regarding CT metering which seems to be generating inaccurate/implausible readings. Our charity has a commercial building with 3-phase connection into a busbar chamber at one end - let’s call us ABC. The rest of the chamber...
  19. JWallstrop

    Double tap transformer?

    Across the pond in the US we allow utility-owned transformers to be tapped up to six times but an identically set up customer-owned transformer to only be tapped once unless following the feeder tap rules, see: Feeder and Secondary Tap Rules (mikeholt.com) Tapping of the secondary on a...
  20. M

    110v transformer to air compressor

    I recently brought a 110v aircompressor but when I brought it I was told I could run it through a transformer box as i work on site which worked fine for a month but now the transformer box keeps tripping and has even blown the fuse in the plug. Am I right to run it through a transformer box...

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