BG Doorbell Transformer

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Taylortwocities said:
The Spec(if you can believe it) says it is rated at only 0.33A at 24VAC!!!
Click to expand...

And that "spec" is for use as a door bell supply. Door bells only take current while the bell is ringing. They do not take current continuously.

Taking 0.33 Amp continuously could result in overheating of the transformer. If it has a thermal cutout this may have operated and this would explain the lack of output from the transformer.
 
At last @ITGURU you have revealed the model number. This was requested some time ago.

Ok, you probably know that this model requires
Power supply: 12 V DC / 600 mA (max)
There are thousands of supplies that provide that (or better) output. to help you, the Hikvision user manual helpfully lists about 20 recommended power supplies.
you couldn’t go wrong if you just get one of those.
 
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DetlefSchmitz said:
Well. The data sheet claims they output dc. The data sheet was also written by someone with no technical training so is complete nonsense. (It apparently has a constant power output - I don't think so!) It sounds like you may be doing something wrong though. Maybe a picture of you testing it would help?
Click to expand...

Yet another example of manufacturers instructions being wrong.
 
ITGURU said:
Thanks all. So what alternative could I use without using the cheap and high failure rate of standard plugin 12v dc transformers that you can get generically off the internet. looking for something a bit more reliable.
Click to expand...

There is no such thing as a 12V DC transformer. As you have been told transformers are AC devices. You need a 12V DC power supply.

Got any old TV set top boxes no longer in use? They often have external 12V DC power supplies you could reuse.
 
Taylortwocities said:
I’ve emailed BG support to flag the issue to them. But they knew two years ago that the data sheet is wrong. This is from Screwfix queries about this product.
Click to expand...
Had a reply from BG, and a revised datasheet. Of course, they blame Covid for them not correcting their error!
Thank you for your interest in our Circuit Protection range.

The original CUB1 datasheet was produced from the initial design spec, and we sadly didn’t notice it was still showing information from prior to a change in the spec during the design process.

We do have an updated correct version of the datasheet (attached to this email) which was meant to be going onto the website a little while ago, but Covid-19 and furlough have had some impact on this unfortunately.

If you have any further questions please feel free to let us know.

Below is the corrected version,. but that doesnt help the OP.

CUB1 Datasheet New (2019).pdf
 

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  • CUB1 Datasheet New (2019).pdf
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It is still badly written

enclosure. It is DIN rail mountable and changes 240v AC power into either 8,12 or 24V AC, providing constant power to the mains powered door bell.
Click to expand...

The door bell uses either 8,12 or 24V AC. It does not operate on mains.

Maybe this is being too pedantic but accuracy and clarity is needed in the wording of information provided to the DIY market place.
 
bernardgreen said:
It is still badly written ... The door bell uses either 8,12 or 24V AC. It does not operate on mains. .... Maybe this is being too pedantic but accuracy and clarity is needed in the wording of information provided to the DIY market place.
Click to expand...
That may be verging on the 'pedantic' side, but I'm surprised you did not comment (as someone did previously, in relation to the previous version) on "...providing constant power to ..." !

It sounds as if (like I was told about MK ones) that BG's "Technical Data Sheets" are written by the marketing department, not by anyone who knows what they are talking about :)

Kind Regards, John
 
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