I good webmaster can make all the difference. I for one find that website
next to useless.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From
By under-excitement and over-excitement, do you mean lagging and
leading power factors?
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From
overheating)
Not all utilities (network operators) do a good job with voltage
regulation across their longer MV distribution feeders.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA
But electrical equipment does on occasion get moved and reinstalled, so
the nameplate provides information
which might otherwise be lost. ( as in the all important and rarely read
user instruction manual).
___
Ralph
WWII.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
-
This message is from the IEEE Product Safety Engineering Society emc
A very nice example of another use of the 120/240V nameplate marking
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
Don Gies don.g
i.e. basic insulation remains after failure of the grounding means. (e.g.
a metal chassis still touch-safe)
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance
that one fb
loop) used to claim THD 0.05% to at least 20kHz. So 1% THD out to
150kHz might not be unreachable, at least for those older amps. Slew rate
limit might be a gotcha.
___
Ralph McDiarmid | Schneider Electric
should satisfy the 30Vrms
requirement, but the THD might
be a problem at the highest frequencies.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
John Woodgate j...@jmwa.demon.co.uk
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
01/23/2012 09:55 AM
Subject:
Re: [PSES
, there shouldn't be a problem,
but how do they wear out?
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From:
jral...@productsafetyinc.com
.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From:
John Woodgate j...@jmwa.demon.co.uk
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
01/11/2012
.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From:
Aldous, Scott scott.ald...@aei.com
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
01/11/2012 07:39 AM
Subject:
Re: [PSES] Steady State
.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From:
ce-test, qualified testing bv - Gert Gremmen g.grem...@cetest.nl
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
12/27/2011
.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From:
ce-test, qualified testing bv - Gert Gremmen g.grem...@cetest.nl
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
12
.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From:
Aldous, Scott scott.ald...@aei.com
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
12/23/2011 08:29 AM
Subject:
Re: [PSES] Orgalime: UL an effective barrier
One antenna, two antennae is an exception I suppose.
As I have told my friends and family many times; I'll learn a second
language only after I have mastered English.
_
Ralph McDiarmid | Schneider
.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From:
ce-test, qualified testing bv - Gert Gremmen g.grem...@cetest.nl
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
12/07/2011 12:59 AM
Subject:
[PSES] FW: [PSES
Many times there seems a disconnect between what is required by a standard
and what is needed for compatibility.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA
For in-house pre-compliance testing, we use a VBW of 10Hz to approximate
the time response of an AVG detector. Seems to work quite well.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies
Yet how far would you take that argument? If it's say 11.1db at 110MHz
and 11.5dB at 112MHz, would you still worry about
factor at 111MHz? At some point surly this all becomes rather silly.
_
Ralph
.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From:
don_borow...@selinc.com
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
12/06/2011 02:03 PM
Subject:
Re: [PSES] Average detector/s
Bill-
Seeing as how I am seldom at a loss
.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From:
Ken Javor ken.ja...@emccompliance.com
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
12/06/2011 02:56 PM
Subject:
Re: [PSES
)
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From:
Ken Javor ken.ja...@emccompliance.com
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
12/06/2011 01:45 PM
Subject:
Re: [PSES] Average detector/s
If video averaging
I sure hope that standard practice and practicality (pardon me) go
hand-in-hand. If not, the committees members
need to give their head a shake.
_
Ralph McDiarmid | Schneider Electric | Renewable
receivers. It would seem to be a simple as that with no
post-processing by receiver or computer necessary. The book is 35 years
old, but I suspect QP detectors haven't changed since then.
_
Ralph McDiarmid
Gracefully degradation is a term often associated with software systems.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From
And by response do you mean the time-constant used in a typical AM
receiver AVC? .
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
are compliant and
you control what solid insulation is used as a critical component, I
think you need only look for breakdown, not leakage.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business
How about four 12V car batteries in series with a fuse and battery charger
handy.
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
Does the industry really need another standard, I wonder?
_
Ralph McDiarmid | Schneider Electric | Renewable Energies Business |
CANADA | Regulatory Compliance Engineering
From:
John Woodgate
and
in accordance with its operation instructions, these devices are in fact
quite safe. Clearly some devices are truly not intended for use by
anyone.
_
Ralph McDiarmid | Schneider Electric | Renewable
here, but alas with all the litigation on this side of the pond,
it will likely never happen. On the other hand, CSA and UL do employ a
lot of good people.
_
Ralph McDiarmid | Schneider Electric
I don't have a copy of CISPR 16 to reference and so I am curious about how one
calibrates an AMN? (or an antenna for that matter). I can see characterizing
the AMN so that its transducer factor versus frequency is known and can be then
used to calculate a uV level.
Ralph McDiarmid, AScT
Could the interaction between a facility mains filter and the line-side
impedance of an AMN result in a network with at least one resonant
frequency?
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf
True also for an antenna, I assume.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of John
Woodgate
Sent: Tuesday, January 27, 2009 11:25 AM
snip
In the case of an LISN, there are no adjustable
Ground is a commonly misunderstood term by many analogue, digital, safety and
EMC specialists.
Return or Common are likely far more useful terms. I like local
reference too.
Ralph McDiarmid, AScT
Xantrex Technology Inc.
From: emc-p...@ieee.org on behalf of John Woodgate
Sent: Mon 12/22
I would only add that there are those who learn something and those who simply
learn how to pass a course. The two groups normally find different career
paths in the technology sector.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc
From: emc-p...@ieee.org
That's my understanding too.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Clif
Brick
Sent: Thursday, December 04, 2008 8:50 AM
To: Gert Gremmen; emc-p...@ieee.org
Subject: RE: EMI Receiver
I could
EN50178:1997 is missing from this list. Has it been superseded, or is it now
a rogue standard?
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf Of Brian Jones
Sent: Wednesday, November 05, 2008 1:23 AM
Thanks Brian. The 'light-bulb' went on shortly after I sent my e-mail. I
realized too late that I was looking in the wrong list. Time for a cup of
coffee. :-)
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc
From: Brian Jones [mailto:e...@brianjones.co.uk
I dare say that you can likely find a NIB replacement CRT from one or two
vendors in the USA.A Google search may be all that’s needed to locate
one.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
From: emc-p...@ieee.org [mailto:emc-p...@ieee.org] On Behalf
Is it possible to insert a resistor between surge generator and CDN to
provide the correct impedance? Here is one source of high-voltage,
power resistors.
http://www.caddock.com/Online_catalog/high_voltage/high_voltage.html
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex
Option B? I thought I was the only one left with a cassette player in
my car. :-)
Not sure why anyone would bother with satellite radio, I find
terrestrial AM and FM broadcasts still have decent variety.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
From
These two standards appear to be identical, at least in scope with both
applying to equipment rated 75A and below. Does anyone know why this is
so?
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
-
This message is from the IEEE Product Safety Engineering Society
What would be an example of a Common Deviation?
thanks,
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
From: John Allen [mailto:ja014d7...@blueyonder.co.uk]
Sent: November 14, 2003 12:13 PM
To: Ablewisp - Compliance Engineers; Emc-Pstc
Subject: Re: IEC and EN
this one in question cannot be written sufficiently
clearly, then I suggest they be withdrawn and rewritten and then carfully
assessed.
Some have questioned whether 61000-3-2 is even an EMC standard!
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
From: Jim Ericson
I suggest that an arc is something continuous and producing light or
illumination. A spark is something abrupt and short lived.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
From: Speakman, Jim [mailto:jim.speak...@uk.thalesgroup.com]
Sent: September 22, 2003 8
the fewest parts.
With current-mode controllers, both discontinuous and continuous mode
operation are usually easy to make stable in a closed-loop control design.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
www.xantrex.com
tel: (604) 422 2622
fax: (604) 420 1591
I agree. It seems rather silly to specify a mains or other cable included
with the equipment in the DoC or to have separate DoCs for each cable.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
www.xantrex.com
tel: (604) 422 2622
fax: (604) 420 1591
From: Gordon,Ian
.
No damage to the product is allowed as a result of any EMC immunity test
described or referenced in this standard.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
www.xantrex.com
tel: (604) 422 2622
fax: (604) 420 1591
From: John Woodgate [mailto:j
I would expect a 50/60Hz transformer to be a very poor transformer at
150kHz. The leakage inductance alone would attenuate the signal
substantially. The iron laminate material in the core would also be very
lossy at that frequency.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex
Here's a text we have found useful:
Printed Circuit Board Design Techniques for EMC Compliance
A Handbook for Designers
by Mark I. Montrose
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
www.xantrex.com
tel: (604) 422 2622
fax: (604) 420 1591
This message
I agree with you. If an agency disallows a particular test set-up or
procedure, they should be able to articulate that concern in writing and
justify it as well. I know that may sound somewhat idealistic.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc
things they simply don't understand or have no
experience with. Fair enough, I suppose, I can see their point of view and
they must take a conservative approach at all times.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
www.xantrex.com
From: Brian O'Connell
which
accompanies the equipment. (no more Criteria A,B or C)
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
From: John Woodgate [mailto:j...@jmwa.demon.co.uk]
Sent: April 25, 2003 2:19 PM
To: emc-p...@majordomo.ieee.org
Subject: Re: Performance Criterion
I read
and it should be carefully defined.
Thanks also to all you have responded so far. I encourage the discussion to
continue.
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
www.xantrex.com
tel: (604) 422 2622
fax: (604) 420 1591
From: Frazee, Douglas (Douglas) [mailto:dfra
interpretation?
Thanks,
Ralph McDiarmid, AScT
Compliance Engineering Group
Xantrex Technology Inc.
I would like to know if there are significant differences between VDE701-1 and
IEC60990 with regard to test circuits for measuring leakage currents and touch
currents. Both IEC1010-1 and EN60950 both refer to test circuits which appear
to be derived from 60990.
Thank you,
Ralph McDiarmid
You can also do that at the IEC webstore.
Ralph McDiarmid, AScT
Member Technical Staff
Engineering Services
Xantrex Technology Inc.
www.xantrex.com
tel: (604) 422 2622
fax: (604) 420 1591
Confidentiality Notice: This email message, including any attachments,
is for the sole use
We use four florescent screw-in lights in our 3-metre chamber and detect
some
emission 3dB or so above the noise floor.
Ralph McDiarmid, AScT
Member Technical Staff
Engineering Services
Xantrex Technology Inc.
-Original Message-
From: POWELL, DOUG [mailto:doug.pow...@aei.com]
Sent
I would have expected that the inductance would dominate the branch
impedance at line frequency and its harmonics.
Ralph McDiarmid, AScT
Member Technical Staff
Engineering Services
Xantrex Technology Inc.
www.xantrex.com
-Original Message-
From: John Woodgate [mailto:j
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