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Re: Oil Burner Ignition Transformers

Subject:  Re: Oil Burner Ignition Transformers
  Date:   Mon, 12 May 1997 16:12:47 Eastern Daylight Time
  From:   "Mad Coile{" <ts5815-at-devrycols.edu>
    To:   Tesla List <tesla-at-pupman-dot-com>


>Subject:  Re: Oil Burner Ignition Transformers
>  Date:   Sun, 11 May 1997 16:12:31 -0400 (EDT)
>  From:   "Daryl P. Dacko" <mycrump-at-cris-dot-com>
>    To:   Tesla List <tesla-at-pupman-dot-com>
>
>
>At 12:19 AM 5/11/97 -0500, you wrote:
>
>>I have come to realize that there is some misinterpretation as
>>to what an oil burner ignition transformer really is and how it 
>>should be used.
>>
>>First let me point out that there are two types of oil burner 
>>ignition transformers currently in existence. The older units
>>which are contained in a metal box approximately 5 inches X 4 inches
>>X 3 inches and are designed for continuous duty and IF used properly 
>>are damn near indestructible! Then there is the newer units that are 
>>much smaller and sometimes not even enclosed in any casing, these are 
>>NOT designed for continuous duty and are USELESS in terms of usage in 
>>a Tesla coil. 
>>
>>Now to describe what the older oil burner ignition transformers are
>>and how they should be used. An oil burner ignition transformer is
>>a regulating transformer just like a pole pig is and as such MUST
>>be used with a series limiting inductance in it's primary circuit or 
>>you will indeed burn it out! This is because a regulating transformer 
>>attempts to maintain a constant output voltage by pulling more 
>>current when it is under load. In a Tesla coil the H.V. transformer 
>>for all intents and purpose is short circuited, which for a 
>>regulating transformer means it is going to try and pull an infinite 
>>amount of current and burn itself out in the process. By comparison a 
>>neon sign transformer is NOT a regulating transformer for if it were 
>>it would either burn out itself or destroy the neon tube it was 
>>connected to. This is why neon sign transformers do not need any
>>current limiting inductance when used to drive a tesla coil. You
>>can add some variable inductance to a neon transformer to allow
>>you to operate your coil a various power levels but it is not 
>>required to protect the transformer. In an oil burner transformer
>>and with pole pigs you MUST current limit their primaries or you
>>will either burn out the transformer or in the case of a pole pig you 
>>may burn out the mains.
>
>It's pretty obvious that there must be quite a few diffrent types of oil
>burner transformers available.
>
>All the OBT's I've used were self-regulating, just like a neon
>transformer. All were rated at 23 Ma., and were desgined to run
>all day long keeping the flame lit in fuel oil furnaces.
>
>Let's keep comparing notes and see what we come up with !
>
>Daryl
>
>
>
>

I have also used OBT's on my first coil, two in parallel, I don't have
any
limiting or protection except for a gap across the output terminals of
each
OBT. I have ran that thing a lot, and never experienced any OBT falure
or
even a slight temp. rise.

TES