transformers

Search the forum,
Recent contents Top users
  1. G

    current transformers

    what are they and why fit them? apparently scottish power insist on them if your over 100a per phase. anyone know why?
  2. C

    details of transformers for bench sockets

    hi all. 1st post so go easy. i am currently doing the 2391-2 design course and have the Carters Automotive Electronics project. Part of the assignment asks for details on the bench sockets using electrical separation. I cant seem to find any info on here about how tranny would be fed from d/b...
  3. rmaynard

    Installing current transformers

    I have been installing ct's for current monitoring, I have been asked to put up outside air temperature sensors which relay back to the monitoring board, whilst I'm quite capable to do this I don't understand what they would be used for? Anyone enlighten me? Rob
  4. O

    Transformers 1kva 3kva 5kva

    Was wondering what the OV in a transformer stands for? OV EARTH EARTH OV 415V 110V This was how the transformer looked inside. I just assumed the OV was for the neutral but was told it wasn't? Any help appreciated, thanks!
  5. N

    when the voltage drops the current increases and 110 volt transformers

    My apprentice asked me about this when a voltage drops the current increases so why can you use 110v on building sites so i though id share the answer for any one else who wants to know , the reason is the transformer , we know that a safe voltage is less than 50 volts so what the transformer...
    • nickblake
    • Thread
    • aus current drops earth going transformer transformers volt voltage volts
    • Replies: 0
    • Forum: Australia
  6. A

    Can you use WAGO push connectors on transformers

    If you have a lighting transformer with primary and secondary leads for MR16 downlights, can you use WAGO push connectors to link the primary side to the mains lighting circuit? What are the recommendations for connecting lighting transformers to the mains if the are supplied with pre-terminated...
  7. A

    Accessible lighting transformers

    As the 17th Ed Regs state that all junctions need to be located in an accessible place, what is the deal with low voltage transformers for downlights? Many come with screw type connections so is the recess/hole for the downlight classed as accessible? If so, couldn't you just put a small...
  8. S

    Lutron rania dimmer problem

    I've been asked by a customer to look at a lutron rania dimmer. The problem is when switched on the lights flash light a strobe light all over the room. Spoke to lutron they believe that it overcurrent so I split the room lighting and still have same problem. Anyone come across this before...
    • Strickers
    • Thread
    • aus dimmer halogens lutron overcurrent problem transformers
    • Replies: 19
    • Forum: Australia
  9. shakerbess

    transformers

    hi could anybody help me please and point me in the right direction i need to find information about transmission transformers and distribution transformers and compair there construction hope some one can help need to hand in for monday thanks
  10. S

    Three phase transformers question

    Hi All Could anyone confirm the following: A 3 phase transformer has delta wound primaries and star wound secondries. The turns ratio is 1:1. If 415v is applied to the primary, will the secondary voltage be 240v? I think it will because the secondary output voltage will be: primary line...
  11. N

    12V Lighting Transformers.

    Evening, Just wanted peoples thoughts on the quantity of ELV transformers on one 6A lighting circuit, is there a recommended maximum ?? Logically if a 10-60Va transformer has a primary current of 0.27A then you will reach a limit but is there a stipulated limit:confused: Cheers
  12. H

    Max load on 850watt dimmer

    ? trying to work out max load on 800watt dimmer with 50watt low voltage down lights have to calculate the load by the amount of 60va transformers instead of the lamp watts not sure how to convert the amount of 60va transformers into max watts for the dimmer
    • HUD
    • Thread
    • amount aus dimmer dimmers load max transformers watts
    • Replies: 3
    • Forum: Australia
  13. P

    Transformers

    Hi guys. I will be fitting three low voltage lights tomorrow. the bulbs are 20 watt, so do I fit a 60 watt transformer or is it better to fit a 80 or 105 watt transformer in case the end user desides to fit high wattage bulbs.
    • pburley
    • Thread
    • aus transformers
    • Replies: 13
    • Forum: Australia
  14. C

    Temporary Paralleling of Transformer for Changing Over Supply

    I have two 415V busbars separated by a bus section which is normally open. Busbar 1 and busbar 2 are normally fed separately by transformer 1 and transformer 2 respectively. Both transformer's HV side are from the same 11kV board. Both transformers are of the same manufacturer, model, ratio, tap...
    • calvint
    • Thread
    • before canada changing fault parallel problem supply temporary transformer transformers
    • Replies: 4
    • Forum: Electricians' Talk | All Countries
  15. 10linepoet

    Testing Transformers

    We are installing a 300 kVA transformer, 3 wire 3 ph 520 V/345 A in with 4 wire 3ph 440 V/394 A out. Does anyone know if there any significant tests required or things to be aware of (pitfalls) when testing this type of equipment? We propose to undertake an Insulation Resistance test of the...
  16. C

    DSI controlled dimmable electronic transformers ?

    Morning guys, Does any body know where I can sounrce DSI controlled Dimmable Low Voltage Transformers ? I need to control some display lighting along with the modular fittings and be able to dim them all for when a presentation is being done in the room. The controls for everything bar the 50w...
    • craig
    • Thread
    • aus controlled dimmable electronic led transformers
    • Replies: 1
    • Forum: Australia
  17. H

    ct's current transformers problems

    i have a problem with mutipue ct's the main ct is at the intake shed then the cable runs to the building there there is another ct in the basment then goes upto more ct's for the db's on the 3 floors. the 3 ct's for the db's add upto the same as the main one in the shed but the one in the...
  18. P

    Isolation Transformers and consumer unit RCDs

    Hello A little help here would be appreciated. I often use a 230/110VAC 3kW isolation transformer for review testing computer power supplies on 110VAC at home. My problem is that every once in a while I plug the transformer in and the ring main 30A RCD trips out. It's not every time so I...
    • paulktreg
    • Thread
    • aus consumer consumer unit isolation rcd rcds transformers unit
    • Replies: 3
    • Forum: Australia
  19. R

    Rating downlight transformers....

    Here's a silly question. I've never put in a transformer-type light before, so bear with me please.... I=Watts/Volts, yea? But, when I am using a 35w halogen and a 240-12v transformer for each downlighter, do I work out the amperage as 35/12, or 35/240?? Or something else? 2.9 amps per light...
    • rocker
    • Thread
    • aus downlight rating transformers
    • Replies: 21
    • Forum: Australia
  20. P

    transformers

    hi currently doing transformers and has anyone got a chart/method working out the turns ratio and current on each side thanks

OFFICIAL SPONSORS

Electrical Goods - Electrical Tools - Brand Names Electrician Courses Green Electrical Goods PCB Way Electrical Goods - Electrical Tools - Brand Names Pushfit Wire Connectors Electric Underfloor Heating Electrician Courses
These Official Forum Sponsors May Provide Discounts to Regular Forum Members - If you would like to sponsor us then CLICK HERE and post a thread with who you are, and we'll send you some stats etc

YOUR Unread Posts

Tags

advice aus cable circuit course earth electric electrical electrician hello led light lighting lights looking new please question rcd socket supply switch testing training wiring
This website was designed, optimised and is hosted by untold.media Operating under the name Untold Media since 2001.
Tiling Advice
Back
Top
AdBlock Detected

We get it, advertisements are annoying!

Sure, ad-blocking software does a great job at blocking ads, but it also blocks useful features of our website. For the best site experience please disable your AdBlocker.

I've Disabled AdBlock