transformers

  1. 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...
  2. 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...
  3. 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
  4. 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
  5. 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...
  6. 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
  7. 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
  8. 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: Electrician Talk | All Countries
  9. 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...
  10. 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
  11. 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...
  12. 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
  13. 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
  14. P

    transformers

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

    testing selv lighting

    hi everyone, when ir testing a selv lighting circuit if you cant get to the transformers to disconnect the transformers do you test at 250v and test between line&neutral connected together and test between them and earth is that correct
  16. B

    Testing r1+r2

    its me:), Hi all,new to testing so go easy on me if it's a silly question,On a periodic when testing r1+r2 & zs on a lighting circuit with ELV downlighters fitted how is it done.If the transformers are not accessable:eek: for bypass or disconnection is the r1+r2 test just done...
  17. Q

    10kva three phase site transformers

    Hi Folks, we building 6 storey block of flats and need a quite few 30 units of 10kva transformers connecting up to the mains. At the moment we have five trafo on 32A type C braker and that gives us a proper headache with its nusianse tripping, even without any load. Can anybody tell us how many...
  18. Mark.W

    Testing Downlighters

    Hi Chaps I am going to see a customer on Thursday with regards to a downlighter in his bathroom tripping the breaker, I suspect the downlighter isn't suitable for a bathroom which has corroded the terminals but will investigate further on thursday. My question is, if i have to replace the...
  19. Mark.W

    Outside socket

    Chaps A friend has asked me to put an outside socet in for him, It's a simple run, basically about 3 m in length. I am going to use an IP55 weatherproof socket, but not sure what size breaker to use 16A or 20A? Could one of you kind gents please advise me? It will be on a 30mA RCD as well...
    • Mark.W
    • Thread
    • aus confused extension going outside outside socket socket transformers
    • Replies: 4
    • Forum: Australia
  20. E

    Line & Neutral Testing

    When testing an existing circuit lighting circuit I found that there were a great many 12v lights in the bedrooms and bathroom and was unable to access some of the transformers therefore I was unable to test between line and neutral with the switches shut, would this be acceptable on the...
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