So, the consensus seems to be that new CE regulations REQUIRE a
circuit breaker switch both the hot and neutral?  The product here is a
12 channel, 20 amp per channel light dimmer run off a three phase Y.  Our
design (which is standard in the US) distributes the incoming three
phases each to four circuit breakers.  These breakers then drive chokes
and solid state relays, which then drive the load.  Loads are connected
between an output terminal block (driven by the SSR) and a "neutral bar"
that ties all the load neutrals to the incoming line neutral.
        As long as the neutral is indeed near ground, this appears safe.
However, this bid request from Jordan is specifying two pole breakers.
I'm thinking we need to replace all the breakers with two pole breakers,
distribute the neutral to each breaker, then have a neutral and hot pair
for each load on the terminal block.  Our main problem seems to be
finding the two pole breakers that will fit where the existing single
pole breakers fit.
        I realize this is considerably off topic, but this is the only
list I'm on devoted to design and with such an international audience.
It's great!
        On another international topic, several of my PIC designs are
powered by 12VDC, 500mA "wall warts" with a 2.1mm center positive DC
plug.  We get calls from dealers wanting a 230VAC 50Hz input wall wart.
We can get them, but it VERY unlikely that they will fit the wall outlet
in the country the user is in.  What are the rest of you doing?  I'd sure
like to have a US supplier that I can call up and say "I need a 12VDC,
500mA, 2.1mm, center positive wall wart for Nigeria" and they'd send me
the right thing...

Thanks!

Harold




Harold Hallikainen
harold@hallikainen.com
Hallikainen & Friends, Inc.
See the FCC Rules at http://hallikainen.com/FccRules and comments filed
in LPFM proceeding at http://hallikainen.com/lpfm


_____________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com
Or call Juno at (800) 654-JUNO [654-5866]