Jamison, IMO, it’s the sharing of the supply with domestic establishments that is the key to the application of the definition of the classes. Clearly, a large industrial facility could be fed at MV and have MV loads as well as LV loads, so the question of whether there is a substation or not might be moot. What we know for certain is that there are no domestic establishments that are fed at MV. :-)
If you have a look at the scope of EN 61000-6-2, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards-Immunity for industrial environments, you’ll find that they call out ISM equipment based on Class A as defined in EN 55011, so while the classes are not explicitly part of the Generic standard, they are referenced. Look for the sharing of the supply as the criterion. If it’s shared with domestic users, it’s Class B as far as I’m concerned. Doug Nix d...@ieee.org +1 (519) 729-5704 > On 19-Oct-16, at 10:34, Kortas, Jamison <jamison.kor...@ecolab.com> wrote: > > Doug- Thanks very much for this. > > Within this group, I often get responses before the initial email, so I > missed this one the first time through. Two questions: > > 1. Is it safe to say that the same definitions hold true for immunity > as well? > 2. Would the following statements be true as well? > Original Statement: If a location is fed from its own substation and there > are no dwellings supplied from that substation, it’s an industrial location, > and therefore Class A. > a. If a location is not fed from its own substation, but there are no > dwellings supplied from that substation, it’s not an industrial location, and > thereforeClass B. > b. If a location is fed from its own substation and there are dwellings > supplied from that substation, it’s not an industrial location, and therefore > Class B. > > Without knowing the details of every installation, is there a relatively > simple way of categorizing types of buildings that would be fed by its own > substation, for example? > > > Thanks, > > Jamison > > From: Doug Nix [mailto:d...@ieee.org] > Sent: Tuesday, October 18, 2016 11:25 AM > To: Kortas, Jamison <jamison.kor...@ecolab.com> > Cc: IEEE EMC PSTC <EMC-PSTC@LISTSERV.IEEE.ORG> > Subject: Re: [PSES] Criteria for determining industrial vs. non-industrial > for EMC testing purposes > > My understanding has always been based on the Class and Group designations in > CISPR 11 / EN 55011 for ISM equipment (based on the 2009 edition): > > 5.3 Division into classes > Class A equipment is equipment suitable for use in all establishments other > than domestic and > those directly connected to a low voltage power supply network which supplies > buildings used > for domestic purposes. > > Class A equipment shall meet class A limits. > > Warning: Class A equipment is intended for use in an industrial environment. > In the > documentation for the user, a statement shall be included drawing attention > to the fact that > there may be potential difficulties in ensuring electromagnetic compatibility > in other > environments, due to conducted as well as radiated disturbances. > > Class B equipment is equipment suitable for use in domestic establishments > and in > establishments directly connected to a low voltage power supply network which > supplies > buildings used for domestic purposes. > > Class B equipment shall meet class B limits. > > The key in all of this is the source of power supply for the equipment. If > the equipment is supplied from mains that are shared with domestic > establishments, then it must meet Class B requirements IMO. > > If the equipment is intended for industrial use, i.e., Class A, where the > power supply from the mains is not shared with domestic establishments, then > Class A performance is acceptable. > > The deciding factor is the sharing of the supply with domestic > establishments. If a location is fed from its own substation and there are no > dwellings supplied from that substation, it’s an industrial location, and > therefore Class A. > > Doug Nix > d...@ieee.org <mailto:d...@ieee.org> > +1 (519) 729-5704 > > On 18-Oct-16, at 08:44, Kortas, Jamison <jamison.kor...@ecolab.com > <mailto:jamison.kor...@ecolab.com>> wrote: > > Good Morning, > > What do you use for criteria when reviewing the intended environment in which > a device will be placed to determine if it is industrial or non-industrial? I > have seen and read varying opinions on what criteria to use. > > It ranges from a transformer isolated factory to the nature of the other > products in the immediate vicinity (a mechanical room in a grocery store = > industrial due to the equipment in its immediate environment). > > I am familiar with some of the definitions in places, but am not so sure that > those are what are typically followed in practice. > > I appreciate any thoughts. > > Thank you. > > > - > ---------------------------------------------------------------- > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. 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