Usually, you have to submit an "unpotted transform" and while not a
big deal it takes extra co-ordination with the transformer folks. A more
important feature, at least for me, is that the vendor has to prove all of
the materials and thicknesses, not me. It also allows the manufacturer of
the transformer to make cost changes to the transformer by either submitting
the changes directly the safety house, and not impacting my delivery
schedule.
Gary
-----Original Message-----
From: Peter Merguerian [mailto:pmerguer...@itl.co.il]
Sent: Monday, April 23, 2001 3:00 AM
To: 'Matsuda, Ken'; emc-p...@ieee.org
Subject: RE: Transformer Question
Ken,
The closest you can get is UL's category for Transformers (Construction
Only) and covered under their category XORU2. These are teransformers that
have been cosntructed to various standards and meet the constructional
requirements only. Testing is done as part of the end-product.
It is a benefit to have coverage under this category since it would
alleviate from submitting transformers and parts list for dissection and
construction evaluation. Dissecting a transfrormer is the last thing a
product safety engineer wishes to touch! Agree?
PETER S. MERGUERIAN
Technical Director
I.T.L. (Product Testing) Ltd.
26 Hacharoshet St., POB 211
Or Yehuda 60251, Israel
Tel: 972-3-5339022 Fax: 972-3-5339019
Mobile: 972-54-838175
-----Original Message-----
From: Matsuda, Ken [mailto:matsu...@curtisinst.com]
Sent: Saturday, April 21, 2001 1:38 AM
To: emc-p...@ieee.org
Subject: Transformer Question
Group,
I was wondering if you could help me with this one? Currently, I have a
switching power supply, using custom transformers. Now I am looking at
submitting this product to a agency...
Many transformer manufacturers claim they build to UL ...standards,
obviously, this is not considered approved, but are there
transformer houses that can manufacture transformers that are considered
recognized components under a program similar to a sign shop program, where
customers can request custom wound transformers that are covered under the
UL recognition ?
Thanks for any input,
Ken
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