To: 'emc-p...@ieee.org'
Subject: Repeated Hi-Pot Testing - Destructive?
Hello Esteemed Group,
I have a question concerning repeated hi-pot testing in regard to whether or
not it’s destructive.
Background: Some electrical components are hi-pot tested before they’re
shipped from
or
component selection in the first place!
John Allen
London, UK
-Original Message-
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Brian
Oconnell
Sent: 24 June 2011 19:12
To: 'IEEE'
Subject: RE: Repeated Hi-Pot Testing - Destructive?
FWIW, my (anecdotal) experience indicates
.
no-mold Brian in the desert southwest.
-Original Message-
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of Scott Xe
Sent: Friday, June 24, 2011 10:36 AM
To: richardn...@comcast.net; IEEE; richard.pitten...@hobartcorp.com
Cc: ri...@ieee.org
Subject: Re: Repeated Hi-Pot Testing
.
Some years ago, I connected several power supplies in
parallel to a hi-pot tester. I ran the tester for 8
hours/day, 5 days/week. After about 1-1/2 weeks, I
detected some insulation abnormalities.
At the relatively low voltages that we use for hi-pot
testing, the very good typical
...@ieee.org
Subject: RE: Repeated Hi-Pot Testing - Destructive?
Associated Research (hipot manufacturer) recently did a webinar on this
topic. They did some studies that basically showed that repeated hipot
testing doesn't do much if anything. If you are interested here is a link
Hi Brian:
Very Interesting test on the power supplies. What was the
test level and where was it applied? What were the
'insulation abnormalities' that were detected?
Test voltage was 1500 RMS.
Insulation abnormalities: noise from the PS units, and
some perturbations in the hi-pot
, I
detected some insulation abnormalities.
At the relatively low voltages that we use for hi-pot
testing, the very good typical insulations, and the
low frequency of recurrence of the test, damage to
insulation is not likely.
Don't worry about it.
Best regards,
Richard Nute
Product Safety
in Vancouver?
Brian
-Original Message-
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of
richardn...@comcast.net
Sent: Wednesday, June 22, 2011 2:59 PM
To: emc-p...@ieee.org; richard.pitten...@hobartcorp.com
Cc: ri...@ieee.org
Subject: Repeated Hi-Pot Testing - Destructive
://www.asresearch.com/events-training/webinar-archive.aspx.
Regards,
Nick
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Fred Townsend
Sent: Wednesday, June 22, 2011 4:32 PM
To: 'Richard Pittenger'; 'emc-p...@ieee.org'
Subject: RE: Repeated Hi-Pot Testing - Destructive?
Richard:
Here
Engineering
From: richardn...@comcast.net
To: EMC-PSTC@LISTSERV.IEEE.ORG
List-Post: emc-pstc@listserv.ieee.org
Date: 06/22/2011 02:59 PM
Subject:[PSES] Repeated Hi-Pot Testing - Destructive?
Hi Richard:
Insulation breakdown starts
for the hardware but
I can't point to any studies showing this.
-Ken
On Wed, Jun 22, 2011 at 5:32 PM, Fred Townsend ftowns...@sbcglobal.net wrote:
Richard:
Here is my take. In hi-pot testing a stress voltage is applied but
virtually
no energy is absorbed so I would not expect any aging
insulation abnormalities.
At the relatively low voltages that we use for hi-pot
testing, the very good typical insulations, and the
low frequency of recurrence of the test, damage to
insulation is not likely.
Don't worry about it.
Best regards,
Richard Nute
Product Safety Consultant
Vancouver
Richard:
Here is my take. In hi-pot testing a stress voltage is applied but virtually
no energy is absorbed so I would not expect any aging effects. The dielectric
is expected to continuously hold off the voltage applied. Therefore, one or a
hundred tests would be the same.
During a surge
Hello Esteemed Group,
I have a question concerning repeated hi-pot testing in regard to whether or
not it’s destructive.
Background: Some electrical components are hi-pot tested before they’re
shipped from their manufacturer. In the end-use manufacturing location, some
sub-assemblies may
Hi Sam:
Correct me if I'm wrong, but the point of the type-level hipot test is not
to simulate a real-life condition (like surge protection), but to simulate
years of insulation degradation, which happens with or without surge
protection.
I disagree.
Primary circuits are subject
also have to re-examine the surge response.
If you have any questions, please let me know.
Thanks,
Bryan.
From: Chris Maxwell
To: EMC-PSTC Internet Forum
Sent: 8/28/03 11:45 AM
Subject: Hi-Pot testing
All,
We have a product that runs from AC power.
During safety testing at the lab, the unit
Subject: Hi-Pot testing
All,
We have a product that runs from AC power.
During safety testing at the lab, the unit passes HiPot testing. However,
the unit is broken by the testing.
Rigorously, the unit passes its type testing because it doesn't become
unsafe by the Hipot. However, it isn't
I read in !emc-pstc that Chris Maxwell chris.maxw...@nettest.com wrote
(in 83d652574e7af740873674f9fc12dbaa0189d...@utexh1w2.gnnettest.com)
about 'Hi-Pot testing' on Thu, 28 Aug 2003:
The hipot test burned out the rectifier.
Well, it absolutely ought not to have done. The hipot test is applied
...@majordomo.ieee.org
Subject: RE: Hi-Pot testing
Thanks for the response.
It's hard to say. I wasn't there for the hipot test. I just saw the
aftermath.
A little background:
The unit under test had a power supply which we designed from off the shelf
building blocks. The first building block
Drive, Utica, NY 13502 | USA
web www.nettest.com | tel +1 315 797 4449 |
-Original Message-
From: Rich Nute [SMTP:ri...@sdd.hp.com]
Sent: Thursday, August 28, 2003 1:31 PM
To: Chris Maxwell
Cc: emc-p...@majordomo.ieee.org
Subject: Re: Hi-Pot testing
Hi Chris
2. When the unit is in the field, it will have the surge protection
installed,
which will essentially limit any real life hipot voltages to about 500V
(230V
gas tube, 275VAC MOV). In real life, the unit would experience a maximum
500V
hipot. However, in the case of a single fault (surge
Hi Chris:
During safety testing at the lab, the unit passes HiPot
testing. However, the unit is broken by the testing.
Rigorously, the unit passes its type testing because
it doesn't become unsafe by the Hipot. However, it isn't
functional after the test; and it
, August 28, 2003 11:45 AM
To: EMC-PSTC Internet Forum
Subject:Hi-Pot testing
All,
We have a product that runs from AC power.
During safety testing at the lab, the unit passes HiPot testing. However,
the unit is broken by the testing.
Rigorously, the unit passes its type testing
All,
We have a product that runs from AC power.
During safety testing at the lab, the unit passes HiPot testing. However, the
unit is broken by the testing.
Rigorously, the unit passes its type testing because it doesn't become
unsafe by the Hipot. However, it isn't functional after the
Roughly one year ago, there were a number of excellent appends to
this listserver on the basis for hi-potting, and what is and is not proven
by the hi-pot test. The recent discussion makes these of current interest
for those wanting a better understanding of the electric strength tests
cited
).
Scott
s_doug...@ecrm.com
ECRM Incorporated
Tewksbury, MA USA
-Original Message-
From: peperk...@compuserve.com [mailto:peperk...@compuserve.com]
Sent: Thursday, November 04, 1999 10:38 AM
To: pmerguer...@itl.co.il
Cc: emc-p...@majordomo.ieee.org
Subject: Machinery; EN 60204 hi-pot testing
as production line test requirements for holders of CE marking self
declaration documents, who knows?
As you, I await the group's reception of this note with bated breath.
Jeff Lind
Compliance West
Recently I have seen some questions in this group regarding hi-pot testing
and IEC1010
Recently I have seen some questions in this group regarding hi-pot testing
and IEC1010 and prEN50116.
I am not familiar with prEN50116 (perhaps someone can enlighten me about
that), but I am familiar with IEC1010 and hi-pot testing.
In amendment 2 to IEC1010 Annex K changes from Informative
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