step down

step down

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  1. N

    reversing a step down transformer to step transformer

    Hi there im in training, but my question is using using a 3 phase 480v delta to 208/120 delta transformer 30kva and wiring it in reverse for 208 primary input for 480 volt secondary . My motor requirements is 460volts with the motor being 10hp,(14amps) but it has variable motor controls which...
  2. msibart

    faceplate adapter 3 to 1 step down

    Hi all, Newbie here. I have moved into a house where there was a 3 gang dimmer switch controlling 3 parts of one room. was a bit excessive and I want to combine them all into one, having converted them from halogen to LED downlighters. Now the faceplate is double size and the smart dimmer I...
  3. 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...
  4. M

    UK Question for Experts - Step up / Step down transformer?

    Hi everybody, I am writing to ask your expert opinion. I bought online a disc repairing device (JFJ easy pro) to be used on my music cd collection. Unfortunately I made a mistake and didn't notice it was a US version (110 v) and it came with a US 3-pin plug as well. I live in the UK and I notice...
  5. M

    Step Down Transformer from Receptacle - Expected Results?

    Hello, I have a 125/250v - 50amp twistlock receptacle in a 3phase building (so, 208v between hots). It's a 4-wire receptacle. Currently, when needed, I split the phases/hots to attain two lines of 120v, each capable of 50amp current. If I installed a knock down transformer (208->120) into the...
  6. T

    Step up and Step down transformer

    Why is Delta star transformer used for step down transformer and star delta for step up transformer? According to this book, Electrical Power Systems By C L Wadhwa
  7. 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...
  8. Benzo

    Step Down converter needed?

    Hi, I've just bought these speakers: Specs - Giga Sound Systems MX-F830B | Samsung Home Audio - https://www.samsung.com/us/video/home-audio/MX-F830B/ZA-specs (1,000 Watts). I was advised by the seller that I need to use a step down converter to use this device safely. I wanted to know if this...
  9. P

    Step up and Step down transformers

    Hi guys I am currently training to be an electrician and have only been at college about 6 months. So my understanding of things isn't particular great. Anyway I have recently come across transformers and whilst I understand the general idea is to either increase or decrease the voltage for a...
  10. J

    Can I Get A 127 Volt Step Down Transformer?

    Hi there, Not all that knowledgeable on this kind of thing but I purchased four audio-visual appliances made in 1970. All are identical apart from the voltage requirements. One requires 117 volts - the other 3 units require 127 volts Can I get transformers for such voltages? Also what...
  11. S

    No Neutral at 3 phase step down autotransformer?

    Hi all, Been a few years since i've posted but here goes! At the factory I work in we have an old Spanish line from the mid-eighties that is fed from uk 400v 3 phase via a 3ph step down autotransformer to give 380v output. The spanish panels Do not use a neutral, just 3 phases and further 380v...
  12. R

    415v to 380v step down trafo

    Hi i have industrial washing machine originally from Italy which was installed in the UK with a step down trafo from 415v to 380v now the machine is to be installed in Ireland with line voltage of 400v. my question is do i still require the step down trafo, am aware of current and torque...
  13. D

    Step down transformer questions

    So, i've been working on fire alarms for the past few years so not touched a transformer in ages, and i've forgotten almost everything i learnt about them. Just a few questions and sorry in advance if they seem stupid... Am i right in thinking they only run at full power for a short period and...
  14. T

    Step down transformer enquiry

    Hi, I am enquiring about choosing the right step down transformer in order to use my USA steam cleaner. My steam cleaner specifications are as follow: 110V 12.9Amps 1400W. I would be very grateful, if you could kindly let me know which transformer should I buy. Please note, that I have...
  15. D

    Question about step down transformer Canadian machine sending to Nigeria

    Hello, I am sending a machine to Nigeria from Canada. This is a laminating machine and has a heater and 3 phase motor and a temperature controller. I know the temp controller will work on 50hz. The machine originates from the USA and runs on 230VAC 3phase 60hz. I am running it at 208Vac 60hz in...
  16. D

    Step Down Power supply from 220V to 120V

    Hi, I am looking to have some rewiring done in my house and want to know if it is possible to have a permanent step down light system in my kitchen. I have some wonderful lights from when I lived in the US and would like to have them fitted here in the UK, Is it possible and what would be needed?
  17. Z

    Step Down Transformer

    Hi I am currently a student studying a degree in Aircraft engineering. I am in my summer holiday and i have set myself a project to better understand electronics... The project I want to build is a power supply 0-30 VDC STABILIZED POWER SUPPLY WITH CURRENT CONTROL 0.002-3 A This is the link...
  18. M

    Step down transformer

    Hi, I recently bought two motorized Dremel 6000 contour sanders from USA. The operating power stated on the sander is 120V 50-60Hz 1.15A I live in Malaysia. The household power rating is 240V 50Hz up to a max of 13A. I used a new 500W step down transformer to power the sander. The step down...

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