Hello group,
It is my understanding that Group 2 devices as per the standard
definition are devices that use electromagnetic radiation for the
treatment of material and spark erosion equipment. In Annex A, under
Group 2 the standard declares Thyristor-controlled equipment. My
question relates to
Hello Group,
For those of you who are familiar with EN55011 or CISPR11 what criteria is
used to determine if a product falls under Group 1 or Group 2? The standards
give some examples of product types but there should be a base criteria
which was used.
Group 1 products seem to be smaller bench t
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 d
he purpose of trying to determine if it
would fall under the Group 2 classification. My current thinking is that it
would.
Let me know if you disagree.
Thanks,
Brian Kunde
LECO
- Original Message -
From: Bailin Ma
To: Brian At Work ; IEEE Group
Sent: Friday, October 08, 1999 6:07 PM
Subjec
My current thinking is that it
would.
Let me know if you disagree.
Thanks,
Brian Kunde
LECO
- Original Message -
From: Bailin Ma
To: Brian At Work ; IEEE Group
Sent: Friday, October 08, 1999 6:07 PM
Subject: re: EN55011 Group 1 and Group 2
Brian,
Here is my two cents worth:
RF
Brian,
Here is my two cents worth:
RF energy generated by Group 1 is intentionally only for internal function.
And Group 2 intentionally generates RF for their working objects.
Thus an electronic microscope (which is not a "smaller bench type test
equipment" -- see your Email) falls under Gro
devices, the RF is used to affect a material.
Hope this helps,
Paul Boudreau
> From: "Brian At Work"
> To: "IEEE Group"
> Subject: EN55011 Group 1 and Group 2
> MIME-Version: 1.0
> Content-Transfer-Encoding: 7bit
> X-Pr
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
Please be advised that the emission limit figures you quote in your
referenced e-mail are _not_ for ClassA Grp2 equipment, but for ClassA, Grp1
equipment. CISPR 11 also specifies 10m distance for this 40dB level.
---
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