Steve,
The one customer I have that does this testing, always goes for Class B so
they are not restricted (no Class A warning label on the product).
Realistically, the Immunity testing is so brutal (eg high levels and special
tests we don't typically do on an ITE product), you probably need a Class B
emissions product that will be able to survive all of the various Immunities.
Just my two cents.
Larry Stillings
Compliance Worldwide, Inc.
________________________________
From: Steve O'Steen [mailto:[email protected]]
Sent: Tuesday, January 04, 2011 2:23 PM
To: [email protected]
Cc: [email protected]
Subject: Emission Requirements for IEC 61850-3
Is anyone in the group familiar with IEC 61850-3, emission requirements? See
excerpts below:
NORME
INTERNATIONALE
CEI
IEC
INTERNATIONAL
STANDARD
61850-3
Première édition
First edition
2002-01
Réseaux et systèmes de communication
dans les postes .
Partie 3:
Prescriptions générales
Communication networks and systems
in substations .
Part 3:
General requirements
5.8 EMI radiation
Communications equipment may also be the source of various kinds of
electromagnetic
disturbances in a wide frequency range, that may be conducted through power
supply lines,
control lines or directly radiated by the equipment.
The communications equipment shall meet the requirements of CISPR 22 classes A
and B
(EN 55022A and EN 55022B) or FCC rules part 15 for class A and B digital
devices 1 (USA).
I've reviewed this standard as well as the remainder of the IEC 61850 series
of standards and can't find any additional guidance regarding which class to
apply. I suspect Section 5.8 above is referencing EN55022 and FCC Part 15 for
the test method in addition to the class criteria for both Class A and B and
the respective limits. If this is the case and given the criteria for Class A
and B per EN 55022, I would expect most devices that fall under the scope of
IEC 61850-3 to require no more than Class A emission limits.
Any input would be appreciated.
Best regards,
Steve O'Steen
Director, EMC
Advanced Compliance Solutions, Inc.
[email protected] <mailto:[email protected]>
770-831-8048 ext. 210
www.acstestlab.com <http://www.acstestlab.com>
ATLANTA, GA - MELBOURNE, FL - BOCA RATON, FL
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