Hi Brian, The UL standard actually references IEC 61000-4-3 only for the test method. Per the UL standard, the test level, 20 V/m, comes from EN 60601-1-2, which is the CENELEC EMC standard for medical devices.
Per this article <https://www.linkedin.com/pulse/understanding-central-differences-between-3rd-4th-edition-saeed>, at least the base standard, IEC 60601-1-2, references broad spectrum testing at 3 V/m for professional healthcare facility environment and 10 V/m for home healthcare environment. Test levels from 9 to 28 V/m at specific frequencies are referenced to simulate proximity to fields due to wireless communications. IMO, the UL standard doesn't make clear if the actual test levels (and frequencies) from EN 60601-1-2 are intended to be used, or just the 20 V/m test level called out. On Fri, Jul 21, 2023 at 10:57 AM <[email protected]> wrote: > Hi Brian, > > > > Just for your information, in Europe residential EV chargers (for > charging an EV with AC voltage), typically needs to fulfill the > requirements of EN 61851-21-2 (product standard for off-board EV > chargers). In this standard you will find the applicable test levels for > immunity testing. One of the tests that needs to be performed is the > radiated immunity test according EN 61000-4-3. (This is the basic standard > which specifies how a radiated immunity test should be performed, in this > test standard you find typical test levels, however in this case the > product standard is where you should look to find the applicable test level. > > > > If the charger will be located solely in a residential environment, a > fieldstrength of 3V/m is applicable. For locations other than residential > 10V/m is required. (modulation used: 80% AM 1kHz in both cases). > > Typically testing is performed in two operational modes: > > 1) the charger is in charging mode > > 2) the charger is in waiting mode. > > > > 20V/m is more than needed (which is of course allowed, but not typically > done by manufacturers) > > > > FCC (for the US region) does not require immunity testing to be > performed. So in FCC part 15B, you’ll only find emission limits. So, not > related to your question. > > > > I hope it helps. > > > > Greetings, > > Bart > > > > *From:* Brian Gregory <[email protected]> > *Sent:* vrijdag 21 juli 2023 18:44 > *To:* [email protected] > *Subject:* [PSES] Immunity test field strength, residential setting > > > > 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 <(720)%20450-4933> > ------------------------------ > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. 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