======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only
www.woodjohn.uk
Rayleigh, Essex UK
I hear, and I forget. I see, and I remember. I do, and I understand.
Xunzi (340 - 245 BC)
-------- Forwarded Message --------
Subject: Re: [PSES] Immunity test field strength, residential setting
Date: Fri, 21 Jul 2023 18:05:59 +0100
From: John Woodgate <j...@woodjohn.uk>
Organisation: J M Woodgate and Associates
To: Brian Gregory <brian_greg...@netzero.net>
61000-4-3 is a Basic Standard. It does not specify test levels but
indicates possible test levels. You need to look in detail at Clause 5,
but look at these words:
/Product committees shall select the appropriate test level for each
frequency range //needing to be tested as well as the frequency ranges./
The residential environment is usually designated Class 2 (see Annex E
of the standard), which calls for 3 V/m.
======================================================================================
Best wishes John Woodgate OOO-Own Opinions Only
www.woodjohn.uk
Rayleigh, Essex UK
I hear, and I forget. I see, and I remember. I do, and I understand.
Xunzi (340 - 245 BC)
On 2023-07-21 17:44, Brian Gregory wrote:
Hello colleagues,
We are building EV Chargers for residential markets (not just US) and
one of the safety applicable standards is UL 2231-2. It calls
out IEC 61000-4-3 for immunity testing parameters, which states a
requirement for a field strength of 20V/m. Our EMC expert says
typically testing is "done at 3 Vrms, which is standard for most
products in residential environments." He can only test up to 10V,
and we're hearing the same from an overseas lab to whom our
manufacturer refers.
Does FCC Part B have guidelines for field strength we can cite? Can
some offer this "DC guy" (aka, 60 Hz) a quick definition of what the
20V/m represents?
I'm guessing 20 V/m is for higher density commercial applications, aka
charging stations, so we probably need an exception for residential.
Thank you!
Colorado Brian
720-450-4933
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