Hello Kenny
Seems to me like the key word is "internal". I think the intent is that
magnet wire connections external to a component would be covered by the
standard. I.E. where the actual winding(s) of a coil or transformer were
brought out of its structure for connection (without an attached lead wire).
I would be careful about specifying how a transformer manufacturer should
build the interior of his product lest I get a component that no longer
meets other regulatory requirements like any number of UL, CSA, IEC and
other agency standards.
John Thorup
> -----Original Message-----
> From: Kenny Bloomquist [SMTP:[log in to unmask]]
> Sent: Tuesday, January 18, 2000 1:43 PM
> To: [log in to unmask]
> Subject: [TN] Transformer Wiring
>
> Hello TechNet,
>
> Here's another one of those specmanship things that has two different
> organizations in our company at odds.
>
> The overall question is should J-STD-001 apply to internal connections of
> transformers and magnetics?
>
> J-STD-001, Paragraph 3.2.1 says, "This standard is very limited in its
> applicability to the manufacturing processes associated with the mounting
> of internal electronic elements and the soldering of the internal
> connections of transformers, motors, and similar devices. Unless a user
> has
> a specific need for the controls provided by this standard, it should not
> be imposed relative to the manufacture of the internal elements of these
> devices. The external interconnect points (i.e., terminals, pins, etc.)
> must meet the solderability requirements of this document, less steam
> aging."
>
> Sounds pretty straight froward until you read the J-STD-001Handbook,
> IPC-HDBK-001. Companion paragraph to 001, 13.2.1 and subsequent paragraphs
> go into great detail about magnetics manufacturing including 13.2.1.4,
> Soldering Magnetic Wire Splices. It says, "Soldered connections involving
> magnetic wire splices SHALL meet the requirements of the Standard."
>
> All that said and going back to my original question (solderability of the
> leads aside), do I impose 001 on my transformer supplier for internal
> connections or not?
>
> Thanks in advance,
>
> Ken Bloomquist
> Sr. Principal Process Engineer
> PRIMEX Aerospace Company
> P.O. Box 97009
> Redmond, WA 98073-9709
> http://www.primextech.com
>
> Ph: 425-885-5000
> FAX: 425-882-5786
> [log in to unmask]
>
> Northcon/2000, Chairman of the Board
> http://www.northcon.org
>
> Electronics Manufacturers Association (EMA), President
> http://www.ema-wa.org
>
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