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Bleeder resistors >1kV

J

Joerg

Jan 1, 1970
0
Usual resistors are rated up to around 700V dielectric. Some exotic SMT
can go to kilovolts but they are expensive, rare and also long so that
breakage or other flex damage is likely. Then there are small specialty
mfgs such as Hokuriko but they aren't really very available at the usual
distributors. Who sells regular resistors that are rated as bleeders
preferably with medical device blessings?
 
P

Phil Allison

Jan 1, 1970
0
"Joerg"
Usual resistors are rated up to around 700V dielectric. Some exotic SMT
can go to kilovolts but they are expensive, rare and also long so that
breakage or other flex damage is likely. Then there are small specialty
mfgs such as Hokuriko but they aren't really very available at the usual
distributors. Who sells regular resistors that are rated as bleeders
preferably with medical device blessings?


** See:

http://www.farnell.com/datasheets/40588.pdf



......... Phil
 
T

Terry Given

Jan 1, 1970
0
Joerg said:
Thanks, Phil!

thats what I would have suggested. These things are great, and 2 in
series has gotten me past all standards so far. there is also the (IIRC)
VR67 range, even higher voltage.

Cheers
Terry
 
C

Corbomite Carrie

Jan 1, 1970
0
Thanks, Phil!


Those are wrong. Only go up to 33MOhm.

As far as the "medical device blessings" That is what YOUR finished
product must acquire, not the components within it. The circuit
operation must pass.

I made a 15kV PS that was meant to be in proximity to humans. The
mouth, in fact. It was current limited to 11µA, and there was a
requisite on how fast that limit fired. The requisites were in case
human contact was ever made, even though the intended use of the device
was meant to be NOT in human contact.
 
P

Phil Allison

Jan 1, 1970
0
"Corbomite Carrie the Pointy Headed Anencephalic "

Those are wrong. Only go up to 33MOhm.


** Huh ???????????????????????????????????

Must be posting straight out of a dementia ward.





........ Phil
 
J

Joerg

Jan 1, 1970
0
Corbomite said:
Those are wrong. Only go up to 33MOhm.

Sometimes you need only a few megs.

As far as the "medical device blessings" That is what YOUR finished
product must acquire, not the components within it. The circuit
operation must pass.

I know. I am designing such stuff since the mid 80's. There are parts
with which it's easy to obtain the coveted blessing and then there are
some (especially some pwoer supply modules) where you just know it's
going to be a nightmare. Problem with resistor mfgs is that a lot of
them were acquired. By Vishay ...

I made a 15kV PS that was meant to be in proximity to humans. The
mouth, in fact. It was current limited to 11µA, and there was a
requisite on how fast that limit fired. The requisites were in case
human contact was ever made, even though the intended use of the device
was meant to be NOT in human contact.


BTDT. Mostly intra-cardiac stuff. There you have to keep it below 10uA
and not all countries go by the 601-1 rules, some make their own
additional ones.
 
T

Tim Shoppa

Jan 1, 1970
0
Thanks, Phil!

I like the comment in the "marking" section: "yellow and grey are used
instead of gold and siver because metal particles in the lacquer could
affect high-voltage properties"!

Tim.
 
M

Michael A. Terrell

Jan 1, 1970
0
Phil said:
** Huh ???????????????????????????????????

Must be posting straight out of a dementia ward.

....... Phil



You should know! He's in the bed next to yours.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida
 
C

Corbomite Carrie

Jan 1, 1970
0
"Corbomite Carrie the Pointy Headed Anencephalic "




** Huh ???????????????????????????????????

Must be posting straight out of a dementia ward.





....... Phil
Tell us, Phallus... what's a good bleeder value for 30kV?

10kV?
 
C

Corbomite Carrie

Jan 1, 1970
0
You should know! He's in the bed next to yours.

Talk about a total retard that needs to be ignored!

That'd be you, TerrellTard.
 
P

Phil Allison

Jan 1, 1970
0
"Corbomite Carrie the Pointy Headed Anencephalic Cunthead "
Tell us, Phallus... what's a good bleeder value for 30kV?


** Irrelevant to 10mm long resistors rated at 3 kV.


You fucking idiot.




......... Phil
 
C

ChairmanOfTheBored

Jan 1, 1970
0
"Corbomite Carrie the Pointy Headed Anencephalic Cunthead "


** Irrelevant to 10mm long resistors rated at 3 kV.

You fucking idiot.

The topic is HV bleeder resistors, Phyl... do try to keep up.

I'll bet that one flatso 100M Ohm HV resistor is cheaper than three
radial leaded 33M Ohm resistors in series from them any day.

Distance has nothing to do with it. The flatso wins there as well.
 
P

Phil Allison

Jan 1, 1970
0
"ChairmanOfTheBored" =
"Corbomite Carrie the Pointy Headed Anencephalic Cunthead "
I'll bet that one flatso 100M Ohm HV resistor is cheaper than three
radial leaded 33M Ohm resistors in series from them any day.

** Irrelevant to 10mm long resistors rated at 3 kV.

You fucking, psycho idiot.

Distance has nothing to do with it.


** Irrelevant to 10mm long resistors rated at 3 kV.

You fucking, moronic psycho.



....... Phil
 
C

Corbomite Carrie

Jan 1, 1970
0
On Wed, 23 Jan 2008 13:16:11 +1100, "Phil Allison"


nothing that means anything.


You probably don't even know what Corbomite is.
 
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