The worst scenario is that the cap. shorts and the CB opens the primary.
To test ripple current handling ability, apply 60Hz at whatever V it
takes to produce the expected ripple current, run it for an hour or so
and feel the case for heat. More than barely warm is not good news.
>Turns out that this capacitor is from an HP defibrulator.
>
>There seems to be a question about whether a defib cap can handle continuous
>PSU filter duty. It may need to be derated.
>
>Any comments?
>
>Regards,
>David Smith
>VK3HZ
>
>
>> From: "David Smith" <vk3hz@wia.org.au>
>> To: <amps@contesting.com>
To: <amps@contesting.com>
>> Date: Sat, 29 Jun 2002 21:31:34 +1000
>> Subject: [Amps] Filter Capacitors - Oil Filled vs. Electrolytic
>>
>> I'm on to building the HV PSU for the 8877.
>>
>> I have 2 alternatives for filtering - a used but good 54uF 4.2kV
>oil-filled
>> Maxwell or a string of 10 new 470uF 450V electrolytics (with 45K 10W
>> equalisers). They work out to roughly the same cost.
>>
>> I'm tending towards the oil-filled cap because it simplifies construction.
>> Any comments on either? I've seen comments here regarding equalising
>> electro strings and also read things about forming them. Do oil-filled
>caps
>> go off over time? Is it OK to mount them on their side?
>>
>> Regards,
>> David Smith
>> VK3HZ
>
>
>_______________________________________________
>Amps mailing list
>Amps@contesting.com
>http://lists.contesting.com/mailman/listinfo/amps
>
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
www.vcnet.com/measures.
end
|