Re: [TCML] caps

[ADAM MUNICH <ajm9414@xxxxxxx>]

I've got access:

http://minus.com/leQ0WT14OJg05 Enjoy!

-Adam


On Sat, Dec 1, 2012 at 2:04 PM, Ed Phillips <evp@xxxxxxxxxxx> wrote:

> I'll look it up at work.  I'm a life member of IEEE but even with that
> access to IEEE  EXPLORE costs extra!  Bummer.....
>
> David Speck wrote:
>
>  Randy,
>>
>> Found one reference to the development of "Lectronol", dated 1945.
>>
>> It states that Lectronol caps are twice as good as mineral oil filled
>> caps.  Therefore, unless they are using castor oil, I'd bet that these are
>> some sort of PCB filled caps.
>>
>> Their specs are excellent for TC work, though the voltage and capacitance
>> are a bit low.  I'd bet that they would withstand voltages up to their
>> rated nameplate values, and come back for more.
>>
>> If you already own them, and they are not leaking, then I'd go ahead and
>> try them for TC work.  You could even try using the water cooling, if they
>> seem to get hot.
>>
>> If you don't own them, I'd steer clear of them.  Disposal of a PCB filled
>> cap down the road can become a major and costly headache.
>>
>> Abstract of 1945 article follows below.  Full article costs $36.00,
>> unless you are an IEEE member.  Perhaps one of the other list members can
>> access the full article for confirmation.
>>
>> Dave
>>
>>
>> http://ieeexplore.ieee.org/**xpl/login.jsp?tp=&arnumber=**
>> 5059041&url=http%3A%2F%**2Fieeexplore.ieee.org%2Fxpls%**
>> 2Fabs_all.jsp%3Farnumber%**3D5059041<http://ieeexplore.ieee.org/xpl/login.jsp?tp=&arnumber=5059041&url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D5059041>
>>
>> ==============================**========================
>> Increased military production has accelerated the application of
>> high-frequency heating where accurate control of temperature for short
>> intervals is fundamentally important. The heating of metals by induction
>> has been widely applied. The present paper describes the development of a
>> new type of dielectric liquid called Lectronol. Capacitors containing this
>> liquid are particularly well adapted for use in the tank circuit of
>> electronic heaters used in induction heating. The capacitor is water-cooled
>> and is housed in a hermetically sealed completely filled nonmagnetic
>> container so constructed as to provide sufficient flexibility to take care
>> of the liquid expansion due to thermal changes. The capacitor is noteworthy
>> because of the absence of cellulose sheet insulation, satisfactory
>> operation being entirely dependent on the superior insulating properties of
>> the Lectronol. Capacitors containing this liquid are characterized by low
>> dielectric loss and high dielectric strength over the frequency range
>> utilized in power oscillators. The capacity per unit volume is
>> approximately twice that obtained with mineral oil. The electrical
>> characteristics of the capacitor are stable under severe conditions of use.
>> ==============================**========================
>>
>>
>> On 11/24/2012 3:29 PM, Randy Burk wrote:
>>
>>  I have 3 Westinghouse water-cooled caps in aluminum housings.  They are
>>> rated
>>>
>>> at 7800V, 240 Amps, Freq 540 KC, .0076 mf.  They contain lectronol as the
>>> dielectric.
>>>
>>> Are these suited for TC service?  What is lectronol and is it hazardous?
>>>
>>> Randy
>>>
>>
>>
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