Question about Gas Discharge Tube

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quanghoc@gmail.com - 29 Aug 2006 01:08 GMT

I wonder what the below properties mean
+ Sparkover
+ Impulse Sparkover
+ Impulse Transverse Delay

I don't seem to find the definition anywhere on Wiki, Google,
Globalspec, or Manufacture website. The product is

http://www.bourns.com/pdfs/2026.pdf

Thanks.

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Homer J Simpson - 29 Aug 2006 01:47 GMT

>I wonder what the below properties mean
> + Sparkover
> + Impulse Sparkover
> + Impulse Transverse Delay

It's defined right there on the page:

DC Sparkover 100 V/s (slow rate of rise of voltage)
Impulse Sparkover 100 V/?s (fast rate of rise of voltage)
Impulse Sparkover 1000 V/?s (very fast rate of rise of voltage)
Impulse Transverse Delay 1000 V/?s (time to fire with very fast rate of rise
of voltage?)

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quanghoc@gmail.com - 29 Aug 2006 16:28 GMT

> DC Sparkover 100 V/s (slow rate of rise of voltage)
> Impulse Sparkover 100 V/?s (fast rate of rise of voltage)
> Impulse Sparkover 1000 V/?s (very fast rate of rise of voltage)
> Impulse Transverse Delay 1000 V/?s (time to fire with very fast rate of rise
> of voltage?)

I never use a GDT so I have a hard time to understand the word
literally. I guess the question should be: what is the definition of
Sparkover, Impulse Sparkover and Impulse Transverse Delay for
non-engineer?

Thanks

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Homer J Simpson - 29 Aug 2006 20:42 GMT

>> DC Sparkover 100 V/s (slow rate of rise of voltage)
>> Impulse Sparkover 100 V/?s (fast rate of rise of voltage)
[quoted text clipped - 7 lines]
> Sparkover, Impulse Sparkover and Impulse Transverse Delay for
> non-engineer?

"?s" should read uS or microsecond or millionth of a second. A rate of rise
of voltage of 100 volts per second is quite slow - if it was a lamp you
would see it change.

A rate of rise of voltage of 100 volts per millionth of a second is very
fast.

A rate of rise of voltage of 1000 volts per millionth of a second is very
fast indeed - in one second you go from zero volts to 1000,000,000 volts
(one billion volts).

I hope this helps.

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Electronics Forum / Basics / August 2006

Question about Gas Discharge Tube