Hi Mike,
If I understand well the computer power supply has a IEC 730 power supply
input and the mounting in a computer frame would not alter the way the
supply is connected to the mains. (plug-in directly in the supply through a
enclosure hole). Then the computer does not need HiPot testing
-Original Message-
From: Mike Morrow [mailto:mi...@ucentric.com]
Sent: Thursday, August 31, 2000 10:40 AM
To: EMC Society
Subject: Why routine hipot is required.
I've been asked why a routine hipot test is required on an
end assembly
computer when it uses a Listed power
Mike,
I have in the past had UL/CSA hi-pot testing waived for
the production line testing of the end product based on
the specific method of installation of the power supply
in the end product.
Bandele
Jetstream Communications, Inc.
badep...@jetstream.com
-Original Message-
Mike,
In my experience, the purpose of the end-assembly, 100% mfg. hi-pot test is
to check the integrity of the electrical connections and of the required
isolation levels. On the manufacturing end, any number of events can create
a disturbance in the insulation of the product. These can often
Hi Mike:
I've been asked why a routine hipot test is required on an end assembly
computer when it uses a Listed power supply that has already been hipot
tested. So far I don't like the way I've worded my response. Basically
what I've said is that a power supply is approved as a
Basically - high potential testing is a means to check the integrity
(safety) of the wiring/components and construction used in the front end
before the power supplies. I have two free publications, from two
companies that manufacture high potential testers, that explain the process
and needs
Mike, I made the same mistake. The power supply was recognized.
- Original Message -
From: Pryor McGinnis c...@prodigy.net
To: Mike Morrow mi...@ucentric.com; EMC Society
emc-p...@majordomo.ieee.org
Sent: Friday, September 01, 2000 12:31 PM
Subject: Re: Why routine hipot is required
Mike,
I have had instances on the manufacturing line were the unit would fail the
Hipot or Ground Bond test. The same holds true. The power supply is an
approved part and was tested by the power supply house. With this
information alone I would recommend doing the tests on the end product.
Josh
Mike:
Here's the beef.
The hi-pot test on the completed assembly, or final product, should be done
as close as possible to the point of production where the product is boxed
up for shipping and/or storage.
The purpose of this is to try and find a defect in the primary side of the
product
Message-
From: Eric Petitpierre [mailto:eric.petitpie...@pulse.com]
Sent: Friday, September 01, 2000 8:33 AM
To: Mike Morrow
Subject: Re: Why routine hipot is required.
Mike,
It would be an easier job to explain if the supply was Recognized
rather than Listed.
The best way I
Mike,
Back in my days as Compliance Engineer for ATT Global Information Solutions
(NCR), I was successful in obtaining UL/CSA waiver for production line hipot
testing of the end product on the basis of using a listed power supply that
had already been subjected to hipot as a part of the power
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