Re: NEED: 6.0uF 1200Vdc capacitor

There is always one in a group. How about I give you my wife's
measurements as well? Geez, I understand about needing all the info on a
vehicle but we are talking about a SPECIFIC capacitor here. I gave size
restraints as well as the exact values it possesses and even as far as to
what item it is in. As to knowing what EXACT manufacturer I am not sure
being I am doing this as a favor for a friend.
I hate to burst your bubble but you do not know everything being the
charger was NOT manufactured in Australia. Ever heard of the word IMPORT. as
in importing of goods. Well it happens with electronics as well and
apparently some components were imported being it was manufactured in the
U.S.A. But I have to admit you are correct in assuming it is an older
charger but not old enough to where it is obsolete.
Just forget I ever asked, apparently you want to dazzle everyone with
your knowledge and rantings on needing an over abundant amount of info.
Apparently anyone who knows there stuff doesn't need to know every detail to
be able to help being I have had some very useful help from others here who
obviously can make a logical conclusion based on SPECIFIC info given.



"Ross Herbert" <rherber1@xxxxxxxxxxxxxx> wrote in message
news:nb7t8155q7nd59qqv3632q111rjd2tk36o@xxxxxxxxxx
> On Fri, 20 May 2005 18:31:40 -0700, "Barry & Nikki"
> <bearmore@xxxxxxxxxxxxxxxxxxx> wrote:
>
> >Didn't figure that info really mattered. I was looking for an exact or
> >equivalent. I realize its old stock; but if it really matters it is out
of
> >the main portion of an electric fence circuit board.
>
> You have reluctantly now told us that the item containing the
> capacitor is an electric fence charger but you fail to give any brand
> or model details. All one can do with what you have provided is to
> make an intelligent guess.
>
> If I had posted a request that said I wanted a fuel pump for my car in
> order to repair it, then this would have been quite rightly greeted
> with derision. The make, model, year etc would be mandatory
> information to supply in order to get any help and your query is in
> the same category.
>
> Given the probable age of your fence charger (or the capacitor in
> question) plus the fact that the manufacturer of that capacitor hasn't
> been in existence since about 1989 then the likelihood of getting the
> same unit is highly improbable. The fact that the capacitor is of
> Australian origin suggests that the fence charger is also Australian
> made as well, but you haven't provided any details related to the
> manufacturer. Since Plessey Ducon no longer exists, and the data on
> this particular capacitor is no longer available, then the more
> information you provide the better able anyone is to suggest an
> alternative.
>
> The application to which a capacitor is put is extremely relevant when
> trying to determine a replacement. The only flexible wire leaded
> cylindrical polypropylene capacitors made by Plessey Ducon were
> produced for the power industry for flourescent lighting power factor
> correction and motor start/run applications, so the unit you are
> trying to replace is most likely one of those, but just why it is
> marked with a dc voltage rating is not clear. These capacitors were
> commonly used in strobe lighting and fence charger applications.
>
> I am guessing that the capacitor is used as the charge storage
> capacitor which is then dumped periodically into the output
> transformer of your fence charger. Depending upon the output voltage
> of the dc-dc converter in the charger, and the turns ratio of the
> output transformer, we can only make a guess as to the ac voltage
> rating of a similar capacitor manufactured currently.
>
> Around the mid 80's the Australian standard AS3129 for fence chargers
> specified that the maximum voltage allowed to be connected to a fence
> was 5kV into a 1 megohm load, plus other pulse timing and allowable
> current details. Also, there was only one Australian manufacturer that
> I am aware of (Jones Transformers model JT349) making an output
> transformer specifically for fence chargers and this had a ratio of
> about 1:20(P:S). This allowed for a dc-dc converter having 250Vdc as
> the output voltage to charge the storage capacitor.
>
> Not having any specific details of your fence charger all I can say is
> that a circuit design I have to hand with these same specifications
> and using this output transformer specifies a metallized paper or
> polypropylene capacitor specified for high current pulse operation,
> rated at 250Vac - 440Vac and between the values of 6.0 - 25uF. Such
> capacitors will safely handle dc voltages from 400V and above, which
> your dc-dc converter is unlikely to produce.
>
> Here is some data on current Australian capacitors similar to the one
> you are looking for
> http://www.tridonicatco.com.au/Medien/cat0304_au/Capacito.pdf
>
> All you have to do now is find something similar where you are located
> so surely you are capable of doing that.
>
> >
> >"Ross Herbert" <rherber1@xxxxxxxxxxxxxx> wrote in message
> >news:arsq815grmagt4cmckcegvad9lnmh4n769@xxxxxxxxxx
> >> On Thu, 19 May 2005 17:59:42 -0700, "Barry & Nikki"
> >> <bearmore@xxxxxxxxxxxxxxxxxxx> wrote:
> >>
> >> >Labeled: Plessey Ducon pulse grade capacitor part number p200. Made in
> >> >Australia. I need this or a compatible replacement. It's a round
"barrel"
> >> >with two wire leads (blue and brown). The housing is about 2" in
length
> >and
> >> >1 1/4 in diameter. Please email me if you can help. Thanks in advance
for
> >> >any help anyone can offer.
> >> >
> >> The P200 would have been a polypropylene film type. That's a fairly
> >> ancient one... Plessey, the UK parent company which bought Ducon
> >> Australia in 1963, folded in late 1989 and I think GEC Siemens
> >> subsequently took them over. Even Siemens has hived off their
> >> capacitor manufacturing business.
> >>
> >> You haven't said what item of equipment this capacitor is mounted in
> >> or what its function might be. Is it on the ac mains side of the
> >> circuitry?
> >>
> >> If it is on the ac side of things then you could possibly use an ac
> >> capacitor of say 280Vac rating such as that made by ASC Capacitors
> >> http://www.ascapacitor.com/ but until you supply the information this
> >> could be an incorrect guess.
> >>
> >> If I am correct then the 6.0uF, 280Vac unit shown on this data ***
> >> would be suitable http://www.ascapacitor.com/PDF/X391L.pdf
> >>
> >> You will have to locate your local ASC distributor.
> >
>


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