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Fellow Professionals
I have another question regarding class II equipment. My power supply
intends to use a printed wiring spark-gap for transient/lightning
protection. It's inherent design requirements are such that the air-gap
spacing are less than those specified f
Hi Hans.
You wrote, amongst other things..
< My power supply intends to use a printed wiring spark-gap for
transient/lightning protection.>
Not a good idea...
Mains transients and lightning etc. have a very low source impedance. If
the volts get high enough to switch on your spark gap, you won
On Wed, 23 Apr 1997 hans_mellb...@non-hp-santaclara-om4.om.hp.com wrote:
> I have another question regarding class II equipment. My power supply
> intends to use a printed wiring spark-gap for transient/lightning
> protection. It's inherent design requirements are such that the air-gap
> spacin
Hi Hans:
Regarding your several questions:
1) Printed wiring spark-gap.
This is a problem because the manufacturing variances of printed
wiring makes the spark gap extremely variable in breakdown voltage.
This is a further problem because when it operates, it creates a
carbo
Below, Bruce Hunter assumes Hans Mellberg is using an air gap comprised
of traces on a printed wiring board. When I first read Hans' message, I
thought he was discussing discrete components. I have seen both used,
but would like to ask you, Hans, to clarify your application, before we
get off on
On Wed, 23 Apr 97 11:33:00 -0700,
hans_mellb...@non-hp-santaclara-om4.om.hp.com wrote:
>I have another question regarding class II equipment. My power supply
>intends to use a printed wiring spark-gap for transient/lightning
>protection.
>Is anyone familiar with exceptions to the clearance rules
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