Peter,
Is the DC Input shown on the power supply ratings label along with the AC
Input? If this is the case then both inputs would have been tested when the
supply was tested by UL and TUV for Recognition. No additional testing would
be required. We have used supplies that are rated for both an AC and a DC
Input in our Equipment (I.T.E.) and the NRTL has never had to do any
additional testing. Any input voltage that is on the ratings label MUST be
tested throughout its entire range during the Recognition process (and also
-6% and +10% of the ratings). You should always check the manufacturer's
installation instructions and/or the Conditions of Acceptability for any
special requirements such as cooling, fusing, etc. that may be required.
Kurt Andrews
Compliance Engineer
Tracewell Systems, Inc.
567 Enterprise Dr.
Westerville, OH 43081
Ph. 614-846-6175
Fax 614-846-7791
Email: kandr...@tracewell.com
-----Original Message-----
From: pmerguer...@itl.co.il [SMTP:pmerguer...@itl.co.il]
Sent: Wednesday, November 17, 1999 10:01 AM
To: emc-p...@majordomo.ieee.org
Cc: al...@itl.co.il
Subject: DC Power Applied to an AC Rated Switching Power
Supply
Dear Folks,
I have a product with an UL/TUV UL1950/EN 60 950 Approved 100-240
Vac rated
switching power supply. Manufacturer has means for 110-370 Vdc
connection
to this power supply. My question is can this be done without
additional
tests? If tests are necessary, what kind of tests are required? My
only
fear is that the X and Y-capacitors and fuse are rated for 250 Vac.
Any inputs would be greatly appreciated.
+++++++++++++++++++++++++++++++++++
RTTE Directive Seminar
Renaissance Hotel, Tel-Aviv
12th January 2000. For details:
http://www.itl.co.il/RTTE.htm
+++++++++++++++++++++++++++++++++++
Peter Merguerian
Managing Director
Product Testing Division
I.T.L. (Product Testing) Ltd.
Hacharoshet 26, POB 211
Or Yehuda 60251, Israel
Tel: 972-3-5339022 Fax: 972-3-5339019
e-mail: pmerguer...@itl.co.il
website: http://www.itl.co.il
---------
This message is coming from the emc-pstc discussion list.
To cancel your subscription, send mail to majord...@ieee.org
with the single line: "unsubscribe emc-pstc" (without the
quotes). For help, send mail to ed.pr...@cubic.com,
jim_bac...@monarch.com, ri...@sdd.hp.com, or
roger.volgst...@compaq.com (the list administrators).
---------
This message is coming from the emc-pstc discussion list.
To cancel your subscription, send mail to majord...@ieee.org
with the single line: "unsubscribe emc-pstc" (without the
quotes). For help, send mail to ed.pr...@cubic.com,
jim_bac...@monarch.com, ri...@sdd.hp.com, or
roger.volgst...@compaq.com (the list administrators).
