hi folks,i got this small surge protector from a friend who moved and
am deciding which appliance (fridge/tv )would benfit most from it.

so i decided to open it up to try and understand how it works.
below are some small photos i took of the inside.

from my limited understanding of electronics the top part is for the
power protection and the lower part for the telephone line
protection.the blue components (looks like a cap & has the lettering
X1Y2 CE472M on it) normally do not conduct but on excessive current
will fuse and shunt current to earth prong.

what is the name of the blue component?how can i tell how sensitive it
is (how much protection it will give) so i can choose where to put it.

thanks
C

http://geocities.com/chevychasen/circuit1_.JPG 28k
http://geocities.com/chevychasen/unit_.JPG 16k
http://geocities.com/chevychasen/circuit2_.JPG 51k
http://geocities.com/chevychasen/circuit2parts_.JPG 56k

"Chevy" wrote in message
om...

what is the name of the blue component?

MOV

how can i tell how sensitive it is

UK? US?

(how much protection it will give) so i can choose where to put it.

its uk voltage. i am particularly curious about which parts do the work
of surge control and which are for lightning protection.

thanks


NSM wrote:
"Chevy" wrote in message
om...

what is the name of the blue component?

MOV

how can i tell how sensitive it is

UK? US?

(how much protection it will give) so i can choose where to put it.

wrote in message
ups.com...
its uk voltage. i am particularly curious about which parts do the work
of surge control and which are for lightning protection.

Probably 400V MOVs. Ask your local Maplins.

The green ringed things may be for lightning.

N

On 22 Jan 2005 09:06:30 -0800, (Chevy) put
finger to keyboard and composed:

hi folks,i got this small surge protector from a friend who moved and
am deciding which appliance (fridge/tv )would benfit most from it.

so i decided to open it up to try and understand how it works.
below are some small photos i took of the inside.

from my limited understanding of electronics the top part is for the
power protection and the lower part for the telephone line
protection.

The Gas Arrestors Are For Phone Line Protection.

the blue components (looks like a cap & has the lettering
X1Y2 CE472M on it) normally do not conduct but on excessive current
will fuse and shunt current to earth prong.

These Are 4700pf Capacitors. They Shunt High Frequency Noise To Earth.
They Do Not Fuse, And Carry Very Little Current, At Least Not Enough
To Trip Your Elcb.

what is the name of the blue component?how can i tell how sensitive it
is (how much protection it will give) so i can choose where to put it.

thanks
C

http://geocities.com/chevychasen/circuit1_.JPG 28k
http://geocities.com/chevychasen/unit_.JPG 16k
http://geocities.com/chevychasen/circuit2_.JPG 51k
http://geocities.com/chevychasen/circuit2parts_.JPG 56k

tHE tHREE bROWN dISCS aRE mOVS (mETAL oXIDE vARISTORS). tHEY aBSORB
tHE sURGE cURRENT.


- Franc Zabkar
--
Please remove one 's' from my address when replying by email.

Hi
Looks to me like the blue component is a capacitor and the yellow one
is a MOV since it has the MOV symbol printed under it.
Ray J.

On 22 Jan 2005 09:06:30 -0800, (Chevy) wrote:

hi folks,i got this small surge protector from a friend who moved and
am deciding which appliance (fridge/tv )would benfit most from it.

so i decided to open it up to try and understand how it works.
below are some small photos i took of the inside.

from my limited understanding of electronics the top part is for the
power protection and the lower part for the telephone line
protection.the blue components (looks like a cap & has the lettering
X1Y2 CE472M on it) normally do not conduct but on excessive current
will fuse and shunt current to earth prong.

what is the name of the blue component?how can i tell how sensitive it
is (how much protection it will give) so i can choose where to put it.

thanks
C

http://geocities.com/chevychasen/circuit1_.JPG 28k
http://geocities.com/chevychasen/unit_.JPG 16k
http://geocities.com/chevychasen/circuit2_.JPG 51k
http://geocities.com/chevychasen/circuit2parts_.JPG 56k

Chevy wrote:

from my limited understanding of electronics the top
part is for the power protection and the lower part for
the telephone line protection.the blue components (looks
like a cap & has the lettering X1Y2 CE472M on it)
normally do not conduct but on excessive current will
fuse and shunt current to earth prong.

what is the name of the blue component? how can i
tell how sensitive it is (how much protection it
will give) so i can choose where to put it.

http://geocities.com/chevychasen/circuit1_.JPG 28k
http://geocities.com/chevychasen/unit_.JPG 16k
http://geocities.com/chevychasen/circuit2_.JPG 51k
http://geocities.com/chevychasen/circuit2parts_.JPG 56k

The blue components are capacitors, as indicated by "C". Xn means a
capacitor is rated for line-to-line AC connections, while Yn indicates
it's rated for line-to-ground. Yn capacitors are never more than about
..005uF, to limit current in case the appliance is operated from an
ungrounded power connection, which will send high voltage AC to any
exposed metal.

The yellow components are probably MOVs, and "HV" probably means "high
voltage". Your best bet may be to Google search by typing in their
numbers, but they're commonly rated for 330VACrms. I don't know of any
way to check their condition if they look normal on the outside and
don't measure as shorts.