British General Fortress 8-24V AC 8VA Bell… (8707P)

£ 8.95INC VAT

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British General Fortress 8-24V AC 8VA Bell Transformer Module (8707P)

For use with metal or insulated consumer units and enclosures. Provides constant power to a mains-powered door bell. Can be used in a high integrity circuit. Works with a hard wired door bell, stepping down the voltage from 230V to 8-24V.

  • DIN Rail Mounted Fitting
  • Overload Protection
  • 2 Modules

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View all: British General Doorbell Transformers

£8.95INC VAT

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Rated 5 out of 5 by from Just what I needed! This is just what I needed to connect my Blink Doorbell Camera with my existing "ding-dong" doorbell chime. Very easy to install, and works perfectly. Would recommend.
Date published: 2022-08-10
Rated 4 out of 5 by from Good transformer Bought along with Wylex din rail enclosure to work with my wired Ring doorbell. Easy setup and install of the transformer. Too early to comment on reliability but as this is outside the consumer unit there is no noise and so far it’s working as expected
Date published: 2022-07-04
Rated 5 out of 5 by from Used with Ring doorbell Used this transformer in conjunction with my Ring v.2 doorbell. The wire clamps are a good size so you aren't fiddling about trying to find them. They clamp securely. Reasonably priced and good quality.
Date published: 2022-06-26
Rated 5 out of 5 by from Nest Perfect for running a nest or ring door bell. Can be placed inside the fuse board or a separate enclosure.
Date published: 2022-06-25
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Will this unit fit inside item 32311? I am confident that it would, I just want to double check.
Asked by: DIYMasterClass

What is the electricty cost of the transformer?

The no load current of this transformer as 45 mA. which means it uses 11 watts of electricity when on and not drawing a bell current (most of the time) If electricity cost 28p Kw/hr that would mean the annual cost is £27 Is that correct?
Asked by: GreenDave
Hi GreenDave, Based on your kWh charge suggestion (which a quick internet search seems to indicate is a possibly a little high). 45mA at 240V (nominally) is 10.8W, and this drops to 10.35W if you take a more average 230V. Still 10.8W, or 0.0108 x 28p = 0.3024p/h, x24h = 7.2576p/day, x365.25 = 2650.8384p or £26.51 (which drops to £25.40 at 230V). One other thing to bear in mind, the no-load readings for a transformer coil can (sometimes) be skewed an unpredictable amount by interactions between the actual transformer coil and the sensing coils in the meter, which if it happens almost invariably causes a `phantom' rise in the readings.
Answered by: Luceco Technical Team
Date published: 2022-07-09

Can I wire two Ring doorbell wired to this unit?

I want to put a Ring wired door bell at the front and another at the back of my house - can they both be run off of a single transformer?
Asked by: BobBeer
Hi BobBeer As long as the wattage of both door bells does not exceed the 8VA rating when connected to the circuit (8W), then you should be able to add both doorbells on this single Bell Transformer Hope this helps,should you require any further assitance please contact us directly on 01952 238128
Answered by: Luceco Technical Team
Date published: 2022-04-25

Not enough power??

The RING Wired doorbell specifies a power requirement of 40 VA. Maybe 30VA is really enough... but why are folk surprised when this transformer rated for 8VA hums or packs up after a while?
Asked by: foxyrhyl

Will this fit my consumer unit, I have Wylex type B breakers? And can it fit behind the cover (I don't have enough spaces)?

Asked by: Wardy2
Hi Wardy2, We do not have any specific technical details for other manufacturers' enclosures or devices, but we would expect that the vast majority of circuit protection devices are within an acceptable tolerance of being the same dimensions. We don't think you will have much luck trying to squeeze the transformer beneath the front cover though as it has a section which sticks out through the usual device slot just as much as our other devices (MCBs, RCBOs, RCDs etc.).
Answered by: Luceco Technical Team
Date published: 2022-03-14
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Brand British General
CSU Device Bell Transformers
Incomer Fitting Type DIN Rail Mounted
Manufacturer Guarantee 1 Year Guarantee
Model Name Fortress
Model No CUB1-01
Output Voltage 8-24 V AC
Pack Size 1
Pieces in Pack/Case 1
Product Type Bell Transformer Module
Rated Operational Voltage (Ue) 240 V AC
Suitable Cable Size 16 mm²