The UK implimentation of the EMC regulations SI 1992 No Si2372 makes it an
offence to take into service relevant equipment that does not comply with the
essential protection requirements of not causing or being susceptible to
interference.
There is no specific offence of taking into service equi
Richard Nute suggests there is a power limit to the effectiveness of a inductor
in meeting
the harmonic limits. If you are prepared to use multiple inductors and
capacitors in a low
pass filter configuration between the rectifier and the linear regulator there
is no theoretical
limit to how much y
I would agree that the definition is wooly but there are some points that are
clear.
First, 'excluded installations' are not outside the scope of the UK regulations.
They
are excluded only from the need to be CE marked and have a DoC as a whole and
from the need to meet the requirements of one of
Some of our products (portable ITE) can be equiped with a WAN radio module.
The non-radio version of the ITE equipment has already a CE mark.
The radio module (oem) is provided with the CE-mark.
The radio module will be internal, using the same housing as the ITE equipment.
The new combination
Does the Low Voltage Directive apply ?
We are a manufacturer of portable, battery powered (NiCd), tele-transaction
computers.
Typical battery voltage is between 3.6 V and 9 Vdc.
All the units have a LCD screen. LCD's with backlight do need a AC voltage
of around 100 Vac or more. This voltage i
Alan,
We know what is "excluded" from needing a CE mark:
(1) Products for which there are no legal requirements as to their technical
characteristics
(2) Products for which there only exist national requirements as to their
technical
characteristics
(3) Products for which the requirements
To re-visit a previous theme "what is an excluded
installation":
1a. The UK Statutory Instrument, clause 13, answers this
with (paraphrased) "two or more items or systems put
together at a given place to fulfil a specific objective but
not designed by the manufacturer(s) for supply as a single
uni
Typically and IP code indicates an enclosure rating. I.e. resistance to hose
applied water, dirt, dust, dripping water, oil, etc. They are roughly
equivelent to Nema type standards. I.e. Nema 4, Nema 4X, Nema 12. Generally
the need for this type of rating is dependent upon the environment yo
Item Subject: IEC 529
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This question relates to the use and application of power cords provided
into the EU when shipped from the USA.
A company builds one version of a highly configurable product. The user
chooses any combination of optional pwbs (over 20 different options) plugged
anywhere into a large backplane
Sandy Florence asked whether anybody knew anything about IEC-529 and "do
you have to comply with it"
You'll have to be a bit less cryptic with that question.
IEC-529, is the brainchild of TC70 on Degrees of Protection provided by
enclosures
(IP Code) and is a basic Safey Publication.
TC70 prepar
Ron Fotino said:
"I don't know about the "legal" position. However, it seems to
me if you are buying the PC for personal use, there is no risk
of losing your PC."
Fully agree. If the manufacturer recalls the product, there
is no obligation on the part of the buy
I don't know about the "legal" position. However, it seems to me if
you are buying the PC for personal use, there is no risk of losing
your PC.
If you are buying alot of them for corporate use or resale, might I
suggest you "leverage" the manufacturer to do the
Hi Tony
Ref: your response to Jerry Fix's mail..
> I thought power line harmonics from power supplies were
> due to the non-sinusoidal waveshapes of the input current
> waveforms from switchers.
>
> Wouldn't a linear power supply create only sinusoidal
> waveshapes at the line frequency such th
Jerry Fix asked about an "inexpensive and simple way to control
power line harmonics (IEC 555 type) for medium power (500 -1000W)
linear power supplies?"
Other contributors to this listserver have already pointed out that
linear power supplies have exactly the same input current waveform
as sw
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