julij 26, 2023 10:43:29 pop.
Za: Boštjan Glavič
Kp: EMC-PSTC@LISTSERV.IEEE.ORG
Zadeva: RE: [EXTERNAL] RE: Clearances >30 kHz
Hello Boštjan,
Appreciate your reply.
I have since learned that Table 10 and Table 11 are for the Working Voltages.
Table 14 is what you mentioned, Withstand Voltag
Jazz ; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [EXTERNAL] RE: Clearances >30 kHz
Dear Ryan,
Table 10 - input is your temporary overvoltage. Normally 2000Vpk for mains
voltages up to 250Vac
Table 11 - input is your working voltage
Table 14 - input is your transient voltage - defined by OVC (for OVC II
25
15 are
dominating.
I hope this helps.
Best regards,
Boštjan
From: Ryan Jazz
Sent: Wednesday, July 26, 2023 12:39 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] Clearances >30 kHz
CAUTION: This email originated from outside of our organisation. Do not click
links or open attachme
015/02/UL_WP_Final_Effects-of-High-Frequency-Voltage-Stress-on-Air-Insulation-and-Solid-Insulation_v4_HR.pdf>
is a paper from UL from 2010 (so before IEC 62368-1 3rd Edition was
published) that has an example based on the IEC 60664 series standards. You
will notice that the example calculates c
Remarkable difference between 29.9 kHz and 30.1 kHz!
On 2023-07-25 23:39, Ryan Jazz wrote:
Dear Members,
Hope you can help me understand the requirement for the clearance
needed between the bottom PCB of power supply to metal chassis.
Looking up UL 62368-1 Third Edition, and using the ‘Volt
Dear Members,
Hope you can help me understand the requirement for the clearance needed
between the bottom PCB of power supply to metal chassis.
Looking up UL 62368-1 Third Edition, and using the 'Voltage up to an including
peak' of 2000 V for overvoltage category II Table 10 for <30 kHz.
I see th
quired clearances
Hi Boštjan,
Note that clause 8 of the standard is relevant for controlled overvoltages. 8.7
states that the clearances from Table 8.1 are appropriate for circuits that are
"protected for the rated impulse withstand voltage peak identified in Table
8.1. The switching test detailed
Hi Boštjan,
Note that clause 8 of the standard is relevant for controlled overvoltages.
8.7 states that the clearances from Table 8.1 are appropriate for circuits
that are "protected for the rated impulse withstand voltage peak identified
in Table 8.1. The switching test detailed in Secti
Dear experts,
I hope you can help me with determination of required clearances.
Product is intended for connection to 3P 480V, 60Hz system, OVCIII.
After Input EMI filter (with SPD) and rectifier, unit has a resonant circuit
which generates high voltages, up to 2300Vpk towards ground (PE
Dear experts,
I hope you can help me with determination of required clearances.
Product is intended for connection to 3P 480V, 60Hz system, OVCIII.
After Input EMI filter (with SPD) and rectifier, unit has a resonant circuit
which generates high voltages, up to 2300Vpk towards ground (PE
@schneider-electric.com ; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] POE creepage & clearances
SELV is 60 vdc but not if outdoor or wet environment - right ???
Then it drops to 30 vdc?
So Ethernet is inside only for easy compliance ??
Maybe one can extend the inside environment to an outside
.
Add up how many isolation transformers are in the circuits back to primary
and/or TNV-1.
From: "ralph.mcdiar...@schneider-electric.com"
To: EMC-PSTC@LISTSERV.IEEE.ORG
Sent: Monday, November 26, 2012 7:21 PM
Subject: Re: [PSES] POE creepage &a
-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] POE creepage & clearances
The external DC power supply needs to be SELV too, not just energy limited.
___
Ralph McDiarmid | Schneider Electric | Solar Business |
:
EMC-PSTC@LISTSERV.IEEE.ORG,
Date:
11/26/2012 12:38 PM
Subject:
Re: [PSES] POE creepage & clearances
Hi Joe,
I agree that an Ethernet circuit would be considered to be an SELV circuit
and that would be true if the POE circuit were completely on premise
generally, which would categorize thi
ternational safety standards which may impose creepage and Clearance
distances.
Also people forget there can be a lot of current coming from a shared PoE
DC supply and eventhough safety requirement creepage and clearances
do not apply between the high and low voltage rails it is good to impose
sep
.
Best regards,
Ron
From: Joe Randolph [mailto:j...@randolph-telecom.com]
Sent: Monday, November 26, 2012 12:43 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] POE creepage & clearances
Hi Ian:
I think the short answer to your question is that under 60950 there are no
requirements
international safety standards which may impose
creepage and Clearance distances.
Also people forget there can be a lot of current coming from a shared PoE DC
supply and eventhough safety requirement creepage and clearances do not apply
between the high and low voltage rails it is good to impose
Hi Ian:
I think the short answer to your question is that under 60950 there are
no requirements for creepage and clearance distance between the Ethernet
circuit and ordinary SELV circuits that are user-contactable. This
is because under 60950, Ethernet is classified as an SELV circuit.
There ar
In message
<7b970d3d82cee74c920c2e6b0d3b837720be5...@sn2prd0610mb358.namprd06.prod.o
utlook.com>, dated Fri, 23 Nov 2012, "Mcburney, Ian"
writes:
I have not started applying IEC 62368-1 as the testing agency I use has
not recommend it. Is IEC 62368-1 the preferred option as opposed to IEC
60
mcbur...@dmh-global.com
www.allen-heath.com
A DMH Pro Company.
-Original Message-
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of John Woodgate
Sent: 23 November 2012 11:40
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: POE creepage & cleara
In message
<7b970d3d82cee74c920c2e6b0d3b837720be4...@sn2prd0610mb358.namprd06.prod.o
utlook.com>, dated Fri, 23 Nov 2012, "Mcburney, Ian"
writes:
We are developing a hand held product that is powered from +48V DC over
Ethernet or from an external +12V DC wall wart PSU. The maximum
internal v
Dear colleagues
We are developing a hand held product that is powered from +48V DC over
Ethernet or from an external +12V DC wall wart PSU. The maximum internal
voltage will be the +48V POE.
Can anyone let me know what the creepage and clearance requirements between the
"primary" Ethernet circu
ers rather than 3000 meters.
Best wishes for the New Year!
Rich
-Original Message-
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of dougp01
Sent: Monday, December 26, 2011 2:51 PM
To: EMC-PSTC
Subject: IEC 61010-1 (2010) Altitude Correction for Clearances
A
All,
I am interested to hear views of this forum on the question of altitude
correction and interpolation. For the record, the highest altitude I have ever
evaluated for product safety is 3,500 meters.
Using IEC 664 for altitude correction, it has always been my understanding that
interpolat
-407-6872
Fax: 970-407-5872
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Aldous,
Scott
Sent: Wednesday, November 14, 2007 8:52 AM
To: iun...@servomex.com; emc-p...@ieee.org
Subject: RE: EN 61010-1 - Clearances
Regarding Case 1 (and any other where voltages do not exceed the
re. Is the 5V
accessible? What happens if the output of the inverter is shorted to the
input - are hazardous voltages per 6.3.1 accessible for any length of
time?
Regarding clearances from the output of the inverter to other circuits,
the same basic rules apply as for Cases 1 and 2 - table 5 wo
Dear All,
I have three questions regarding the calculation of clearances in
accordance with the requirements of EN 61010-1. Can anybody out there help
please?
Case 1 - Mains input transformer (230 Vac rms, Over-voltage category 2)
supplies an ac to dc converter providing +15 Vdc output (not
In message <000301c7c3c3$d21b44f0$d600a...@tamuracorp.com>, dated Wed,
11 Jul 2007, Brian O'Connell writes:
>While we wait for the 'whenever' period to expire, does anyone know of
>a reasonably-priced seminar for HBSE intended for a (somewhat)
>experienced compliance person ? Perhaps a good bo
HBSE intended for a (somewhat) experienced
compliance person ? Perhaps a good book ?
luck,
Brian
> -Original Message-
> From: emc-p...@ieee.org [mailto:emc-p...@ieee.org]On Behalf Of John
> Woodgate
> Sent: Wednesday, July 11, 2007 3:18 AM
> To: emc-p...@ieee.org
&g
In message
,
dated Tue, 10 Jul 2007, "Tarver, Peter"
writes:
>60065, while easier on the volumetric real estate budget, requires some
>good basic reinforcement applied to the mechanical design in the
>relevant areas.
The 60065 test simulates a localized point load, e.g. the corner of
anoth
effective clearances that
provide (at least) reinforced insulation. The standards are IEC 60950-1:2005
and IEC 60065:1998 (I don't have a copy of the 2001 version).
In 60950-1, the method is to apply a force of 250 N using a 30 mm diameter
circular plane surface. This corresponds to a pressu
Hi Gordon:
> Does anyone know from where the values for creepage and clearances given in
> EN61010-1 ("safety requirements for electrical equipment for measurement,
> control and laboratory use - part 1 general requirements") are derived i.e.
> are there other s
I read in !emc-pstc that Gordon,Ian wrote
(in ) about
'DERIVATION OF CREEPAGE AND CLEARANCES' on Fri, 25 Apr 2003:
>Does anyone know from where the values for creepage and clearances given in
>EN61010-1 ("safety requirements for electrical equipment for measurement,
>co
afet.com
www.productsafeT.com
-Original Message-
From: Gordon,Ian [mailto:ian.gor...@bocedwards.com]
Sent: Friday, April 25, 2003 5:11 AM
To: 'IEEE EMC-PSTC GROUP'
Subject:DERIVATION OF CREEPAGE AND CLEARANCES
All
Does anyone know from where the values for creepage and clearance
All
Does anyone know from where the values for creepage and clearances given in
EN61010-1 ("safety requirements for electrical equipment for measurement,
control and laboratory use - part 1 general requirements") are derived i.e.
are there other standards "below" 61010 in
Hello esteemed colleagues,
In IEC 60950:1999 table 2J; EN 60950:1992 table 4; UL 1950:1998 table 4 and
several previous versions of each of these, I am having trouble interpreting
the Additional Clearances Table, sometimes referred to as repetitive peak
clearances. All these standards derive
premier line of defence against
voltage stress breakdowns when reduced creepages/ clearances are delibrately
designed in.
Arun Kaore
EMC Engineer
ADI Limited
Systems Group
Test & Evaluation Centre
Forrester Road, St Marys, NSW 2760
P O Box: 315, St Marys NSW 1790
Tel: 61 2 9673 8375
Fax:
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