television receivers suffered similar susceptibility to impulsive
noise because the video carrier was amplitude-modulated and had a much wider
bandwidth compared to an AM receiver.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From: John Woodgate [m
Working the problem backwards can be a useful check; keeping track of the
units helps too.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From: Patrick [mailto:conwa...@gmail.com]
Sent: Wednesday, July 05, 2017 1:02 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
' the chassis envelope a prime
example, something I encountered some years ago, but never fully understood.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: Bill Owsley [mailto:00f5a03f18eb-dmarc-requ...@ieee.org]
Sent: Saturday
be expected.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From: Richard Nute [mailto:ri...@ieee.org]
Sent: Wednesday, May 17, 2017 10:53 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] low voltage insulation coordination
With the help of Dan Roman (thanks
Has anyone been asked to perform the Unintentional Islanding tests in
IEEE1547.1 at different static PF settings?
Ralph McDiarmid
Product Compliance
Solar Business
Schneider Electric
-
This message is from the IEEE Product Safety
And, why wouldn’t the standard simply provide limits for peak detection and for
average detection? Why the special treatment for DTS I wonder.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From: John Woodgate [mailto:jmw1...@btinternet.com]
Sent: Wednesday
An example given in IEC 61283:
3/N/PE 400/230V 50Hz
or . . .
3/N/PE
400/230V
50Hz
Use of international symbols from IEC 417 is also mentioned.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: Brian O'Connell [mailto:oconne
Non-linear:
Given a relation involving one dependent variable and one independent variable,
the dependent variable quantity does not change in direct proportion to a
change in the independent variable.
I'm not completely happy with it, but it's a start
Ralph McDiarmid
Quite so. I should know better not to criticize without first voluteering to
help.
From: John Woodgate <jmw1...@btinternet.com>
Sent: April 8, 2017 12:30:26 AM
To: Ralph McDiarmid; EMC-PSTC@LISTSERV.IEEE.ORG
Subject: RE: [PSES] definition of terminolog
power S and the sine
of the displacement angle φ
Q=Ssinφ
*what displacement angle?* I know the angle to which it refers, but it's not
stated; maybe somewhere else*
I have to say that all three definitions leave me wanting.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider
ly
that it complies with a specific set of criteria. Product safety is hard to
define, much harder to accurately assess, even with use of the AFMEA and FTA
tools, which are subjective so it seems to me.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Origin
t, which could serve as a reference to
all others for terminology. I think there is one, but it is likely not
comprehensive.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From: Pete Perkins [mailto:0061f3f32d0c-dmarc-requ...@ieee.org]
Sent: Thursday, Apr
I don't know Brian, what single-fault in an SMPS results in the most power,
current and energy?
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: Brian O'Connell [mailto:oconne...@tamuracorp.com]
Sent: Tuesday, March 21, 2017 12
At the risk of drifting off topic, and if I may be so bold, “300” is
unambiguously three significant digits, while “ 3 x 102 ” is one significant
digit of precision. All trailing zeros count toward precision, at least
that's what they taught when I was in engineering school.
Ralph McDiarmid
Dear experts,
If a Bluetooth module is designed into an piece of equipment, does that
equipment then need to meet technical requirements of CFR Title 47, Part 15,
Subpart C ?
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
Perhaps “single-cycle RMS” would be better than “instantaneous”
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From: dward [mailto:dw...@pctestlab.com]
Sent: Friday, March 03, 2017 10:10 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] CORRECTION (wrong
It's about as obscure as using "dBuV/m" for field strength
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From: Ed Price [mailto:edpr...@cox.net]
Sent: Monday, February 27, 2017 5:37 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] Passive Loop
ence
the generics EN61000-6-3 or -6-1 or the EN55014-2 (immunity for household
equip)?
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-
This message is from the IEEE Product Safety Engineering Society
);
• low voltage stabilized d.c. power supplies
It doesn't mention inverters used in vehicles, but I think the principles of
electrical safety in this standard would apply equally well to a small, 12V
inverter.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From
I'll check out that TDK software. We have a Keysight N9322C receiver.
Thanks,
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: Balmukund Vyas [mailto:balmukund.v...@ymllabs.com]
Sent: Wednesday, February 01, 2017 8:56 PM
IEC equivalent to UL458
Thanks,
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post a message to the
" I suspect this is just equipment originated CM current, that cannot be cured
with a better cable; but needs a better equipment CM design. (Or a bunch of
heavy ferrites)."
I suspect that is the crux of the issue, as it is for many ports on all kinds
of products.
Ralph McDiarm
I wonder if RF current on the coax coming in to the cable box then radiates
from the HDMI cable? All that overhead cable strung through residential
neighborhoods must pick up a lot of RFI on its outer braid.
Ralph McDiarmid
Product Compliance
Solar Business
Schneider Electric
We glue the ambient thermocouple to a small block of aluminum. It works well,
and Al has a high Specific Heat. It’s something the regulator (agency) can
“wrap their head around” without a lot of explanation.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
1 minute measurement interval was what I suggested. That has worked well for
power converters from 10W to 1MW. Excel is a good way of determining “steady
state”, and I’ve used that technique for some time.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
Please do tell us about the nonsense statement about diodes. I'd like a Friday
morning smile.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From: John Woodgate [mailto:jmw1...@btinternet.com]
Sent: Friday, January 06, 2017 6:51 AM
To: EMC-PSTC
Oops, sorry Mr. Khrushchev, wherever you are!
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: John Woodgate [mailto:jmw1...@btinternet.com]
Sent: Friday, January 06, 2017 10:40 AM
To: Ralph McDiarmid <ralph.mcdiar...@schnei
or so reading for instance. It
requires some judgement.
I empathize with John's experience about it taking "many tellings" on a
committee to get something right. I have stopped just short of the Makita
Khrushchev United Nations technique at times!
Ralph McDiarmid
Product
McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
*Please consider the environment before printing this e-mail
-Original Message-
From: John Woodgate [mailto:jmw1...@btinternet.com]
Sent: Monday, December 12, 2016 1:50 PM
To: Ralph McDiarmid
I liked the "AlumiConn" connector mentioned in that paper.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: Ted Eckert [mailto:07cf6ebeab9d-dmarc-requ...@ieee.org]
Sent: Monday, December 12, 2016 4:28 PM
To
I surprised it would have ever been 'code compliant' for building wiring. Its
properties must have been well understood long ago.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: John Woodgate [mailto:jmw1...@btinternet.com
Thoughts?
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
This message was scanned by Exchange Online Protection Services.
-
This messa
What's a "ring circuit" ?
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From: Richard Nute [mailto:ri...@ieee.org]
Sent: Saturday, December 03, 2016 12:01 PM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] British question, about a BS1363 plu
for overloading. (esp if at an OATs or in situ)
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From: Ken Javor [mailto:ken.ja...@emccompliance.com]
Sent: Wednesday, December 07, 2016 9:03 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] EN 302 195 Distance
Yet one more acronym to try to remember.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
*Please consider the environment before printing this e-mail
-Original Message-
From: John Woodgate [mailto:jmw1...@btinternet.com]
Sent: Friday, November 18
Stand-alone safe, if used as intended. Many consumer products may no longer be
safe if used or stored outdoors. That too can be addressed with a label, but
Marketing folks hate labels that can be seen.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From
I like many of his ideas, especially "adding manpower to a
late software project makes it later"
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: Nick Williams [mailto:nick.willi...@conformance.co.uk]
Sent: Friday, August
I wonder how Walmart, K-Mart, Sears and others compare.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: John Allen [mailto:john_e_al...@blueyonder.co.uk]
Sent: Monday, August 01, 2016 8:52 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
I cannot see a reason not to have a federal installation code for all 50
states. The hodgepodge of local rules and regulations seems, on the surface,
unnecessarily complicated. By the way, Canada suffers a similar problem with
the proliferation of localized requirements.
Ralph McDiarmid
To all who responded, Thank You. It has helped me compile a list of topics to
discuss with our Notified Body.
Our modest 3m SA chamber in the basement is feeling lonely; too small now for
many of our products.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
Sorry, it's CISPR11
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
*Please consider the environment before printing this e-mail
-Original Message-
From: Ghery S. Pettit [mailto:n6...@comcast.net]
Sent: Tuesday, July 19, 2016 9:01 PM
To: EMC-PSTC
Right, but these large inverters also have high speed DSP and other processors
clocked very fast. Someone on team concluded a 4GHz maximum measurement
frequency based on highest internal clock on one of the sub-assemblies. I
think the big power bridge switches at 3kHz.
Ralph McDiarmid
and voltage probe, current probe,
one "BiConilog" antenna and a nice new SA. We are working with a US EMC
company, and they are a Notified Body under the MRA.
Thanks,
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
Th
safety
standards covering a wide variety of electrical equipment. Or,
product-specific standards could make (or should have made) extensive use of a
reference document, as does IEC62040-1 for example. In that example, 60950-1
is the "RD".
Thoughts?
Ralph McDiarmid
Product
60730-1.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: Richard Nute [mailto:ri...@ieee.org]
Sent: Thursday, July 07, 2016 11:24 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: [PSES] software safety
Software safety... what
l. I wouldn't have suggested that 25 years ago.
* - see IEEE Computer, April 1987, "No Silver Bullet, Essence and Accidents of
Software Engineering"
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: Ted Ec
And, after all, what's wrong with BASIC?It's not the language, but rather
how you use it. I've seen great programs in BASIC and horrible ones in C.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: John Woodgate
But how to calibrate such a thing, to know how much magnetizing force is really
being applied to the DUT ?
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
From: Manny Barron [mailto:mbar...@integrity.com]
Sent: Monday, June 20, 2016 7:54 PM
To: EMC-PSTC
That's how we've done it.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: Brian O'Connell [mailto:oconne...@tamuracorp.com]
Sent: Monday, June 20, 2016 11:06 AM
To: EMC-PSTC@LISTSERV.IEEE.ORG
Subject: Re: [PSES] US Source
Thanks for the explanation Brian; it makes things clearer.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
*Please consider the environment before printing this e-mail
-Original Message-
From: Kunde, Brian [mailto:brian_ku...@lecotc.com]
Sent
not the standards I've worked with. Shorting
that capacitor during type testing does not simulate that condition.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message-
From: John Woodgate [mailto:jmw1...@btinternet.com]
Sent: Wednesday, June 08, 2016 1:38
So, for the protection against FIRE, we have two energy rates, 100VA and 240VA,
used across quite a number of standards, and the units are wrong. Should be
Watts.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
*Please consider the environment before
eld population of say 10,000 units is an act of faith, and
hoping that the odds are with you.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
*Please consider the environment before printing this e-mail
-Original Message-
From: Richard Nute [mailto:
he product of 8A and 30V gives 240VA as a third criterion. I'm not
sure it's that simple though.
Regards,
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
*Please consider the environment before printing this e-mail
-Original Message-
From: Ch
. 240W)
and may also place limit on available current. The expectation is, I think,
that a power-limited device cannot ignite something. I assume there is lots of
history that assumption.
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
-Original Message
Ralph McDiarmid
Product Compliance
Engineering
Solar Business
Schneider Electric
D 604-422-2622
3700 Gilmore Way
Burnaby, BC, V5G 4M1
Canada
This message was scanned by Exchange Online Protection Services
My RCA XL-100 (26 years), my Sanyo VCR (14 years) and my satellite box (13
years) get used every day. Some consumer electronic equipment are
long-life.
___
Ralph McDiarmid | Schneider Electric | Solar Business
An interesting question, since I don't recall seeing a surge rating on any
LISN (AMN) I've come across.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance
.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
Anthony Thomson ton...@europe.com
To:
EMC-PSTC@LISTSERV.IEEE.ORG,
Date:
12/14/2012 04:57 PM
Subject:
Re: [PSES] interesting recall by CPSC
I've seen them rupture
.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
Richard Nute ri...@ieee.org
To:
EMC-PSTC@LISTSERV.IEEE.ORG,
Date:
12/15/2012 11:11 AM
Subject:
[PSES] Why use an MOV?
Presumably, the MOVs in question are connected
line
the over-voltage problem. I've
measured that scenario several years ago while doing debug for EMC surge
immunity.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance
I've seen them catch fire after a 6kV surge pulses applied on a 240V mains
input.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
John
of those and you get an
idea of how the fault tree is assembled)
It can be a real eye-opener
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From
)
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
Grasso, Charles charles.gra...@echostar.com
To:
EMC-PSTC@LISTSERV.IEEE.ORG,
Date:
12/07/2012 10:14 AM
Subject:
Re: [PSES] The Cost of Safety
Years ago I had firsthand experience
.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
Pettit, Ghery ghery.pet...@intel.com
To:
EMC-PSTC@LISTSERV.IEEE.ORG,
Date:
12/07/2012 10:44 AM
-ranging power supplies mark the a.c. input as a list of nominal
voltages, as in 100/120/220/240V.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From
the Internet is now inextricably intertwined
with daily business around the world.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
John Woodgate j
When law can do no right, let it be lawful that law bar no wrong
Shakespeare - from his play King John
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance
intervals all
over the dial on my SW radio at home.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
Ken Javor ken.ja...@emccompliance.com
Sounds most reasonable and most of the ones I saw listed on their website
were between 10 and 20 Euros.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance
The external DC power supply needs to be SELV too, not just energy
limited.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
Ron Pickard
It easiest to just buy the standard, or subscribe to a collection of
standards.
Easier for a larger company, since some of these can be pricey.
___
Ralph McDiarmid | Schneider Electric | Solar Business
And some standards will provide only a reduction in clearance if an
insulator is used, it won't necessarily replace the need for a clearance.
(as silly as that may sound)
___
Ralph McDiarmid | Schneider Electric
I think it's too easily nicked and likely too thin to be relied upon for
Basic Insulation, with the dielectric requirement which comes with that
classification.
___
Ralph McDiarmid | Schneider Electric | Solar
distance is within what
is called the near field and if so, then I assume
spectrum of radio emission wouldn't correlate well to what would be
measured at 10m or 30m.
___
Ralph McDiarmid | Schneider Electric
.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
Doug Nix d...@mac.com
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
09/04/2012 02:21 PM
Subject:
Re: [PSES] Buzzer loudness standard?
Gary,
No. ...3dB
Iphones, Ipads,
smartphones and laptops be kept turned-off during the entire flight. Read
a book, newspaper or in-flight magazine and relax; take some time to
unplug.
___
Ralph McDiarmid | Schneider Electric
was necessary.
___
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:
08/18/2012 10:51 PM
to
see the CE mark approach used here, but unlikely to happen in this
century.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
Pearson, John
It's hard to imagine needing more that 100mW at that frequency for short
range (say 30m)
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From
another, but there are number systems which have obvious benefits. The
binary number system for Boolean algebra
seems the only good fit for instance.
Anyone know how big a 10-penny nail is?
___
Ralph McDiarmid
.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
ce-test, qualified testing bv - Gert Gremmen g.grem...@cetest.nl
To:
EMC-PSTC@LISTSERV.IEEE.ORG
Date:
08/07/2012 11:13 PM
Subject:
[PSES] FW: [PSES] EU sets
I always thought the idea of licensing a receiver was odd. Was it just
because the older television receivers were efficient unintentional
radiators?
___
Ralph McDiarmid | Schneider Electric | Solar Business
)
Although I do understand that Australia will adopt 62109 series. So, the
word is spreading.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From
I didn't see a 9kHz QP bandwidth listed in the specifications, but it must
be there somewhere.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
Or the internal fuse rules!
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
John Allen john_e_al...@blueyonder.co.uk
To:
EMC-PSTC
Nice approach! I suppose it would be harder to find an answer to that
question by a simple Google or two.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance
Yes, that's much better. It requires the knowledge of several related
things.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
McInturff
Thanks Gert. We were thinking 4-wire LISN (phase A,B,C and Neutral)
Your idea of two sets could work; I'd likely simulate on SPICE, then
arrange a breadboard if those results looked promising.
___
Ralph McDiarmid
?
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
-
This message is from the IEEE Product Safety Engineering Society emc-pstc
discussion list. To post
I liked the DIY clamp-on probe idea.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
Ken Wyatt k...@emc-seminars.com
To:
EMC-PSTC
A single-phase, split-voltage or single-phase, 3-wire service are
likely better names for our peculiar 120/240V a.c. system here.
___
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA
of a
product connected to residential branch circuit it's uncertain whether it
would ever fail.
A pound of prevention supposedly being worth an ounce of cure?
___
Ralph McDiarmid | Schneider Electric | Solar Business
makes it trip early, I
suppose.
Ralph McDiarmid | Schneider Electric | Solar Business | CANADA |
Regulatory Compliance Engineering
From:
Peter Tarver ptar...@enphaseenergy.com
To:
EMC-PSTC
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
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