transformers

transformers

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  1. S

    2 LED light transformers popped

    Hi, I have two LED light panels (like this: LED Panel 120x30cm - Varm hvid 3000K-40W - https://www.ledpaneler.dk/led-panel-hvid-kant-120x30cm-3000k.html?source=googlebase&gclid=EAIaIQobChMI5ZHDw8mGggMVrjsGAB0_SQVMEAQYAiABEgKigfD_BwE) which both popped, within about a second of each other, while...
  2. StefanL

    Connecting multiple drives to only one adapter/transformer

    Hi everyone, I have several external disk drives, all from the same manufacturer and all using the same type of transformer - input 220V, output 12V, 1.5A, 18W. Currently I plug them all in a multiple socket plug the length of a Dachshund:)) and it looks just horrible. Is there a way to have...
  3. A

    Split core current transformers

    What are smallest in physical size split core current transformers. Max load 100amp max cable core size 35mm. Power cannot be isolated and space at a premium. Thanks Andy
  4. A

    Changing 50w 12v Halogen downlighter with led type with thin pins.

    As above. Does the electricianI have to remove all the transformers. Are therr not led downlighter led bulbs with thin pins? Thanks.
  5. itln_boysparks

    AC Motors & Transformers Question

    Hey guys, First time user here. 2nd year electrical apprentice down under! Need help and guidance with a question i've been tasked with here. Don't neccersarily need the answer to the question but any guidance into it would be helpful. Question is 'You have a three phase induction motor (415V)...
  6. T

    DC transformers in parallel

    Hi Guys and Girls, First off: I am very new to electrical stuff. Right now I'm running my first ever project containing electrical components. So sorry in advance for very wrong terminology and schematics:) please bear with me. I'm having a Finder Controller (F) to control my "work circuits"...
  7. T

    DC transformers in parallel

    Hi Guys and Girls, First off: I am very new to electrical stuff. Right now I'm running my first ever project containing electrical components. So sorry in advance for very wrong terminology and schematics:) please bear with me. I'm having a Finder Controller (F) to control my "work circuits"...
  8. H

    Replacing halogen transformers to led

    Hi I trying to replace my halogen transformers with LED equivalent. I have 4 spotlights and they have there own transformer. 3 of the transformers I can get to but I can’t get to the last transformer because it’s in an impossible area to get to I think the previous owner has placed the...
  9. J

    110v transformers and overload on secondary

    Just trying to try get my head round these 110v wall mounted transformer I have come across. How comes the second side is unfused? Is there any regs on this? I know the primary usually has has a thermal cut out (is this just purely so we cannot overload and draw too much from the...
  10. D

    Do transformers produce more power than what is put in?

    This might sound like a stupid question but I just don't get it. A electrical engineer at my work who works mainly on the high voltage areas like transformers and sub stations said that the 11kv step down transformers draw only 55 amps on the incoming and that would provide 230v on the outgoing...
  11. C

    Ohm value of transformer

    For those of you who work with onsite MV-LV transformers, does anyone know the line to earth ohm value of a transformer? I'd like to include that in the loop impedance path. Similarly when stepping down LV to LV. View: https://Upload the image directly to the thread.com/a/PIsy0nt View: https://Upload the image directly to the thread.com/JwUM0fv
  12. R

    Lower the voltage of a three phase 220v delta wiring system with auto transformers

    Hi all, I have a three phase 220v delta wiring system but the real voltage is about 240-245V by measuring between the pairs RS, RT, TS. I want to lower it to about 220V so I was thinking to use three auto-transformers 240-220V wired like this: I expect to find 220V between the transformer...
  13. R

    Halogen to LED- Transformers?

    Hi, I was hoping for some advice on replacements for the spotlights in our kitchen. There are currently over a dozen (!), spotlights in the kitchen- all halogen. Many of them have died now, and I’m obviously looking to replace them all with suitable LED replacements, but I’m not sure a) what...
  14. N

    Pure sine wave step down transformers

    hi, Looking for some advice. I’m needing to purchase a step down transformer to run something from the USA in the UK. I already have one, but it’s for a piece of analytical equipment and is giving odd results. Manufacturers think it’s down to the frequency running at the uk 50hz and not 60hz...
  15. E

    Skinflint Seeks Free Advice on burnt-out LED Transformer

    Morning. The LED light above my bath doesn't work. I yanked all the stuff out the ceiling and found this. So far, so good. But hark! I have come to the conclusion that something is wrong with the transformer. Worst case: it may never transform again. If I just buy another one with the...
  16. M

    Question about transformers and on-load tap changers (OLTCs)

    Hi, I have a network with hundreds of busbars (ranging from 33kV to 6.6kV). I have some electrical loads connected at the far end of the network via 2-winding transformers and I am analysing the voltage drops at the point of load connections. Some of these busbars experience around 10%...
  17. B

    Down lights and transformers

    Hi , just looking for some advice on some downlighting and where I stand , a client has provided me with 4 transformers with thermal cut out for there 4 down lighters which are not working , upon inspection of the 4 the down lighters themselves are not fire rated (ground floor flat) (2 story...
  18. D

    IR test with transformers and dimmer on circuit

    Evening Chaps On a job at moment and testing lighting circuits that have a lot of down lighters and a dimmer. Am I correct that if I disconnect live neutral and cpc from board join L-N together with all switches in closed position and test this to cpc and do IR test I have pretty much proved no...
  19. M

    electrical question about transformers

    Hi guys, this is probably a really weird question... you know how there is 3 cables coming in from the transformers to your home? (2x 120V, 1X bare copper neutral). My question is what are the cables feeding into the transformer? is there a neutral wire that goes all the way back to the power...
  20. A

    MR16 replacement not working

    Hello, I am simply trying to replace an MR16 LED spotlight that has stopped working. However when I put the bulb in and turn on the light it simply flashes and turns off and won't turn on. Is anybody able to help me with why this might be happening? The old bulb has the following: Sainsburys...

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