Re: MMC Design UK Bulk Order
On Wed, 30 Jun 1999 04:22:19 -0600, you wrote:
>Original Poster: Alan Sharp <AlanSharp-at-compuserve-dot-com>
>>11 x 1600V 47nF caps in series
>>with 4 strings in parelel. 10Mohm resistors across each cap for safety.
>11 in series for 10kV AC should be fairly bullet proof
>>I intend to use Philips 378 or 376 series caps, from farnell.<
>I've been doing some tests with the Axial 47nF, 1500V from LCR
>from Farnell its 5+ 46p, 25+ 0.40p 100+ 0.35p
>dv/dt 2000V/uS. A string of 4 alongside my 0.067uF cap withstood
>The philips 376 would be ideal - dv/dt 10000 V/uS
>but the value we want isn't there - closest is 47nF at 1000V 54p 100+
>philips 378 series 47nF 1600V dV/dt 900 V/uS
>I would go for the 22nF 1600V dV/dt 1600 V/uS that dV/dt has to
>be doubled in comparison to the 47nF (twice as many strings)
.. sorry, what value isn't there. Remember that Farnell don't carry
all the Philips range.
My 1996 Philips passives catalogue shows 376 in the following (all in
E12 increments) :
1kv 4n7-180n, 1600v 1n8-56n, 2KV 1n-33n (but all these 'non-preferred'
whatever that means)
and 378 in :
1KV 3n3-220n, 1.6KV 5n6-100n, 2KV 3n3-47n, and 2.5KV 2n2-27n (only the
2.5KV are 'non-preferred')