Common mode to what? To the safety ground? How much? Does
it conduct 1 microamp in 5 ns to the safety ground? What kind
of protection is that? Based upon facts and numbers provided,
then my digital multimeter is even a better surge protector -
a claim I can make because specs are better called an
'executive summary'.
At least that manufacturer once provided insufficient specs
for Normal mode protection that the manufacturer does claim to
provide:
Normal mode surge voltage let through 5% of test peak
voltage when subjected to IEEE 587 Cat. A 6kVA test
Now manufacturer cannot bother to provide even that
insufficient information. After all, they are not trying to
sell a 'common mode' claim to the informed. They dumb down
the numbers into rubbish so that one who wishes MOVs absorb
the energy of a surge will see what he wants.
My car tires have a common mode response time AND that
proves those tires are effective protection? Common mode
what? Does not matter. That tiny phrse would be enough even
for a poet to believe what he wants to know.
How much common mode current in less than 5 ns? From what
or which one wire is that common mode response? Is that
common mode response really just a response inside the UPS
controller circuit? Or is that a common mode response on the
serial port. RS-232 is a common mode communication ports. So
does the serial port haves a less than 5 ns response? Wow.
That means the UPS must provide massive lightning protection -
if living in the world of Harry Potter.
IOW they mention 'common mode response' but give not one
indication that the UPS provides common mode surge
protection. It only does something - and they don't even say
what or how much. That woefully insufficient and deceptive
information is enough for some to loudly declare that a UPS
provides lightning protection. IOW another urban myth has
been promoted.
There are no claims of common mode transient protection on
the incoming AC input. Provided are words without relevance so
that a poet might hope for common mode response to something -
which therefore must be a direct lightning strike? It's
called wild speculation on your part - the same person who
foolishly believes shunt mode devices (such as wire) are
designed to absorb energy. But an engineer says, "What is
this crap. There is no numerical information to work with."
That UPS does not claim common mode protection. It simply
claims some undefined of response to common mode noise from or
to an undefined location. It does not even say those 160
joules are involved in such protection. Furthermore it admits
to being grossly undersized - only 160 joules. A poet then
can assume the response time means the UPS will conduct 50,000
amps? A poet can. So can Harry Potter. Those who must deal
in reality cannot.
There is nothing in those specs beyond gobbledygook. Using
ehsjr and Ron Reaugh reasoning, should we assume the UPS is
sufficient even for aeronautical environments? After all,
they do
claim 'something' that myth purveyors can distort into a real
world miracle.
ehsjr - when will you claim that a faraday cage also makes
that UPS so effective?
I have this 741 op amp (a semiconductor amplifier). It also
has a common mode rating. So that operational amplifier (that
little IC) is also a lightning protector? Yes according to
how ehsjr reasons. Give me a break. That UPS does not even
claim to provide common mode protection - which is why they
must all but encrypt their specifications. Its called name
dropping. They dropped the phrase "common mode". That
without any numbers is enough for ehsjr to loudly claim the
UPS provides common mode protection. It is called Junk
Science reasoning.
wrote:
w_tom wrote:
Ron. Did you read your citation before posting it? Where
is the reference to common mode protection? Where are any
numbers that apply to common mode protection?
snip
Where is the common mode protection? Not in that citation.
Not in what Ron describes.
snip
Yes, it IS in that citation, exactly where he said it is.
It is the line below the two you quoted from the page
he cited.
It says: "Surge response time: 0 ns (instantaneous)
normal mode, 5ns common mode."