Robert et al
I am concerned with a product which is 99% "electromagnetically benign" i.e.
it contains no control electronics, other semiconductors or magnetically
sensitive components. However, the product is mains powered and thus liable
to interference due to voltage surges following lightning strikes.
Furthermore, the input power to the devices can be up to 1MW at the top end
of the range.
These products will be sold worldwide.
It would be very difficult to test this size of equipment!
Do you think it would be acceptable to take a variation of the "TCF route"
whereby we test a smaller power unit egg 2kW to demonstrate compliance of
the design and then make recommendations about what measures to take for the
larger units?
I would hope not to involve a Competent Body.
Does anybody have any information on what is done for showing compliance for
mains surges in installations?
PS
For the purposes of this communication: kW=kilo Watts
MW=mega Watts
If there are any "case sensitive" people about!
Thanks
Ian Gordon
-----Original Message-----
From: Robert Johnson [mailto:john...@itesafety.com]
Sent: 01 July 2002 15:57
To: emc-p...@majordomo.ieee.org
Subject: Surge protection
In light of recent discussions about overvoltage protection, the following
document announcement from IEC should be of interest.
IEC/TR 62066 (2002-06) Ed. 1.0
Surge overvoltages and surge protection in low-voltage a.c. power systems -
General basic information
Presents a general overview on the different kinds of surge overvoltages
that can occur on low-voltage installations. Typical surge magnitude and
duration as well as frequency of occurrence are described. Information on
overvoltages resulting from interactions between power system and
communications system is also provided. Additionally, general guidelines are
given concerning surge protection means and systems on the basis of
availability and risk considerations, including interactions and the need
for coordination and consideration of temporary overvoltages in the
selection of surge-protective devices.
ICS codes: 29.020, 91.140.50 - TC 64 - 131pp. - CHF 187,00 for single user
and CHF 243,10 for a three-user network license
Bob Johnson
ITE Safety
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