1. Changes in IEC MV metal-enclosed switchgear standard
Revision currently at FDIS stage
will be published under new number
IEC instead of IEC 60298
introduces new definitions and designations
cancels widely-used categories
as "cubicle", "compartmented" & "metal-clad"
will be more "customer value oriented"

2. Main reasons for the revision
current issue is 13 years old
based on technologies more than 30 years old A revision
to better cover some solutions on the market
to improve wording of basic requirements
to value experience gained on internal arc

3. Schedule and miscellaneous topics
Start early in year 2000 (decided in Kyoto 1999)
introduction of characteristics for enclosure
clarification of:
compartments and their access
partitions, shutters, bushings...
pressure test when pressure relief device

4. User's values classifications
Service continuity level
when opening accessible compartment
sorted considering "Loss of Service Continuity"
without reference to technological solutions
"metal-enclosed" conditions when opened
provided by metallic partitions (PM class)

5. Internal Arc Classification
Optionnal rating, to be declared by manufacturer (no more "agreement")
current, duration, accessibility (faces, type)
Type test completely defined
from ratings and installation instructions
keeping the well known acceptance criteria
providing rules on all test parameters

6. Changes on the market How to define the needs:
need for compartments?
access to some functions?
continuity of service while accessing?
How to describe an offer:
existing and accessible compartments
classifications (LSC1-2A- 2B, PI-M, IAC...)