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Other Vintage Household Electrical or Electromechanical Items For discussions about other vintage (over 25 years old) electrical and electromechanical household items. See the sticky thread for details. |
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2nd Jun 2010, 6:42 pm | #1 |
Retired Dormant Member
Join Date: Jan 2007
Location: Westbury, Wiltshire, UK.
Posts: 2,451
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Shaver sockets?
Are these isolated? I'm trying to find a transformer suitable for use to knock up a 120V supply for a battery set. Need about 15-20mA.
Dave |
2nd Jun 2010, 6:47 pm | #2 |
Retired Dormant Member
Join Date: Jul 2005
Location: West Yorkshire, UK.
Posts: 1,700
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Re: Shaver sockets?
Hi Dave,
Quick answer; yes, as far as I know, they all are. If they're intended for installation in a bathroom, regulations insist on it. Cheers, Kat |
2nd Jun 2010, 7:38 pm | #3 |
Dekatron
Join Date: Apr 2005
Location: Bewdley, Worcestershire, UK.
Posts: 4,748
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Re: Shaver sockets?
They are also designed to saturate and hence reduce the amount of current available under fault or overload conditions. A quick Google search suggests that they are double-wound isolating transformers rated at 20VA. 20VA at 110 volts equates to 180mA, sufficient for your needs.
They are also not cheap - £20-30 - unless you can find a scrap unit from which to extract the transformer.
__________________
Phil Optimist [n]: One who is not in possession of the full facts |
2nd Jun 2010, 8:19 pm | #4 |
Heptode
Join Date: Jul 2008
Location: Hereford, UK.
Posts: 719
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Re: Shaver sockets?
I have used these occasionally, removed from units bought at car boot sales for £1-2, they usually run very hot, even with no load, some have a device in series with either primary or secondary windings, presumably a thermistor or similar current limiting device but I havn't tried these ones
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2nd Jun 2010, 9:10 pm | #5 |
Dekatron
Join Date: Jan 2004
Location: Newcastle upon Tyne, Tyne & Wear, UK.
Posts: 8,195
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Re: Shaver sockets?
These devices are only intended for intermittant use, on a low duty cycle. So if run at near full load for any length of time will get pretty hot, and may even activate any internal thermal fuses fitted.
Ed |