Maybe - but the assertions we've been arguing about is that 'transformers cannot be dimmed', not whether or not they required special dimmers.
Kind Regards, John
Faulty switch?
- Thread starter Jameswren
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Kind Regards, John
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Are you sure they were transformers, not SMPT. It has been mentioned enough times for you to get your terminology right. Also see John's post above.
Yes. That so called related item says:
Not Suitable for
Wire Wound Low Voltage (or other inductive Load)
So it would appear the seller does not even know.
As I said I don't write utter poppycock.
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I'm not sure why I'm being dragged into this
My point was that, despite apparent assertions to the contrary, wire-wound transformers can be dimmed, even if they may need 'special dimmers'!Kind Regards, John
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Winston appears to talk about that which he knows not.
There are many kinds of lighting that can be dimmed, albeit, as John says, with special dimmers, including fluorescent.
So, trying to say otherwise is just plain silly.
As for the nomenclature of the box in the ceiling, this is a DIY site. Even if their manufacturers do not call them transformers, DIY folk would be forgiven for calling them thus, as that, in their eyes, is what they do.
Having said that, despite what winston claims, there are many manufacturers who do label their kit "transformers".
There are many kinds of lighting that can be dimmed, albeit, as John says, with special dimmers, including fluorescent.
So, trying to say otherwise is just plain silly.
As for the nomenclature of the box in the ceiling, this is a DIY site. Even if their manufacturers do not call them transformers, DIY folk would be forgiven for calling them thus, as that, in their eyes, is what they do.
Having said that, despite what winston claims, there are many manufacturers who do label their kit "transformers".
It does, indeed, but it wasn't that 'related item to which I was referring - it was the statement in relation to the toroidal transformer itself, which read "for dimming use Low Voltage Dimmers on the input side of the transformer"
As for that 'related item' (perhaps fortunately, in view of the confusion, now 'Sold Out'!), it's even more confusing. If you look at the second section on this page, you'll see that the section/item is described as "Suitable for use with Toroidal and Wire Wound Transformers", although when you click for more details, one gets back to the statement you quote about it not being suitable for inductive loads!
Kind Regards, John
OK then. It would be possible to dim a transformer load with a variac which is just a variable transformer.
Variacs however are pretty big, certainly not what one would mount on the sitting room wall.
My comments referred to conventional small dimmers using triad technology to chop the mains waveform.
Variacs however are pretty big, certainly not what one would mount on the sitting room wall.
My comments referred to conventional small dimmers using triad technology to chop the mains waveform.
Switch Mode Power Supply.
Interesting abbreviation - sounds more like a mistype of SMTPSwitch Mode Power Supply.Whats an SMPT
Kind Regards, John
Switched Mode Power Transformer.
Yo winston have a watch of this video.
It's a few bits I've just cobbled together in the workshop.
It's a 50VA reggiani TRANSFORMER supplying a 20W 12V halogen load, and it's being dimmed with an MK grid dimmer part number K4501. It's a standard domestic switch. Not a variac and no triads either
You're not going to beleive this, but it actually works, just like you said it wouldn't
So as has already been said, stop spouting poppycock. People on here actually know what they are talking about, and as hard as you try, you can't bullsh-t them.
https://www.youtube.com/watch?v=aJWCDXm5O3I
It's a few bits I've just cobbled together in the workshop.
It's a 50VA reggiani TRANSFORMER supplying a 20W 12V halogen load, and it's being dimmed with an MK grid dimmer part number K4501. It's a standard domestic switch. Not a variac and no triads either
You're not going to beleive this, but it actually works, just like you said it wouldn't
So as has already been said, stop spouting poppycock. People on here actually know what they are talking about, and as hard as you try, you can't bullsh-t them.
https://www.youtube.com/watch?v=aJWCDXm5O3I
Yo winston have a watch of this video.
It's a few bits I've just cobbled together in the workshop.
It's a 50VA reggiani TRANSFORMER supplying a 20W 12V halogen load, and it's being dimmed with an MK grid dimmer part number K4501. It's a standard domestic switch. Not a variac and no triads either
You're not going to beleive this, but it actually works, just like you said it wouldn't
So as has already been said, stop spouting poppycock. People on here actually know what they are talking about, and as hard as you try, you can't bullsh-t them.
https://www.youtube.com/watch?v=aJWCDXm5O3I[/QUOTE]
The word is triac though maybe the spell checker changed it. It is what domestic dimmers use. I suspect that dimmer won't last long and/or the transformer will over heat. Have you tried running it for several hours?
Another thing, the transformers used for 12v halogen lights have poor regulation and will over volt is not run at full load. Running a 20 watt lamp on a 50 watt transformer will shorten the lamp life. That is one advantage of a SMPS.
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