Hello Bruce and EMC-ESPC Group,
The latest draft on next edition of (EN/) IEC 61800-3 is using the CISPR 11
Class A group 2 limits for power drive systems to be used in Second
environment = Industrial use.
The radiated emission limits are 40 dB from 30 - 230 MHz and 50 dB from 230 -
1000 MHz with 30 meter measuring distance. Those limits are derived from CISPR,
11 Table 5 - Electromagnetic radiation disturbance limits for Group 2 Class A
equipment.
So, someone (producers of power drive system?) do want to use at least a part
of the CISPR 11 Group 2 Class A test for power drives.
If some of you are interested in reading this new proposal you must get from
your local IEC Committee, document reference: IEC/22G/73/CD.
Best regards
Helge Knudsen
Delta
Electronics Testing, EMC
Venlighedsvej 4, DK-2970 Hoersholm
Telephone : +45 45 86 77 22
Fax : +45 45 86 58 98
bfag...@us.tuv.com 15-11-00 06:07
Since there are no comments on this so far, I thought I would put my 2
cents in.It seems to me that motor drives would be in group 1, keeping
in mind the first paragraph of appendix A where it says for testing
purposes the equipment is to be defined in terms of the purpose for which
it was designed Also, I believe the power drive system product family EMC
standard, EN 61800-3:1996 uses limits similar to EN 55011 group 1(I don't
have this standard in front of me so please correct me if I'm wrong.)
I'm also curious why someone would want want to be in group 2 because this
requires an additional magnetic field (table 5 of EN 55011) test down to
150khz that could be difficult for Power inverters.
Bruce Fagley
Sr. Specialist, in-situ EMC
TUV Rheinland
Newtown CT.
203-426-0888 ext 119
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