RCD toroids with windings on them

[dave]

Anyone know somewhere in the UK I can buy those small toroidal current
transformers from (as used in RCD devices)?
thx

 

[Palindrome]

dave wrote:

Anyone know somewhere in the UK I can buy those small toroidal current
transformers from (as used in RCD devices)?

http://www.antrimtransformers.com/products.php?sec=1061

Bear in mind that the ones actually used in RCDs will have been designed
specifically for that application and for that manufacturer. "All
Products are manufactured to order, with a full custom design service
available." They won't be normal stock items but, if you ask nicely,
antrimtransformers may give you a couple of them as samples.

However, what I tend to do is to go to a *core* supplier and pick a
suitable core from their range, buy those and wind my own. Again, if you
ask nicely, a few samples to allow you to prototype your design are
often forthcoming.

For a one-off pretty standard non-critical application, a raid of the
junk box will find a few candidates. A few measurements will usually
find one, at least, with suitable core material.

--
Sue

 

[dave]

On Tue, 09 Dec 2008 00:39:24 GMT, Palindrome <me9@privacy.net> wrote:

dave wrote:
Anyone know somewhere in the UK I can buy those small toroidal current
transformers from (as used in RCD devices)?

http://www.antrimtransformers.com/products.php?sec=1061

Bear in mind that the ones actually used in RCDs will have been designed
specifically for that application and for that manufacturer. "All
Products are manufactured to order, with a full custom design service
available." They won't be normal stock items but, if you ask nicely,
antrimtransformers may give you a couple of them as samples.

However, what I tend to do is to go to a *core* supplier and pick a
suitable core from their range, buy those and wind my own. Again, if you
ask nicely, a few samples to allow you to prototype your design are
often forthcoming.

For a one-off pretty standard non-critical application, a raid of the
junk box will find a few candidates. A few measurements will usually
find one, at least, with suitable core material.

Thanks. Great site for this stuff.