84
SIVACON S8 Planning Principles – Conforming to standards and design-verified
Comparison of seismic requirements
There are numerous international and national standards
referring to the classification of seismic requirements.
Classification varies greatly in these documents. For this
reason, the specification of an earthquake zone always
requires reference to the relevant standard or classification.
With regard to the requirements placed on SIVACON S8
switchboards, it is therefore advantageous to specify the
floor acceleration. Or, if this information is not available,
the ground acceleration in the vicinity of the building
accommodating the installation should be given. Fig. 9/3
shows the relation of the seismic categories 1, 2 and 3 from
Tab. 9/4 to the known earthquake classifications and seis-
mic scale divisions
Fig. 9/3: Comparison of seismic scales for the classification of seismic response categories of SIVACON S8
2
0
6
4
10
8
14
12
IEC 60721-2-6
IEC 60068-3-3 UBC JMA SIA V 160 Richter Mod. Mercalli MSK
Kat 3 / K = 1Kat 2 / K = 1Kat 1 / K = 1Kat 3 / K = 2Kat 2 / K = 2Kat 1 / K = 2
1
5
4
3
2
AG1
AG5
AG4
AG3
AG2
1
2b
4
3
2a
I,II
VI
IV
III
V
VI
X
IX
VIII
VII
I...V
1...3
8
7
6
5
4
VI
X
IX
VIII
VII
I
...
IV
V
Z1
Z3a
Z3b
Z2
Legend:
IEC 60721-2-6 Zone classification acc. to the "Map of natural hazards by Munich Reinsurance"
IEC 60068-3-3 Class of ground acceleration "AG" in g acc. to Table 3 of this standard
UBC Zone classification acc. to the Uniform Building Code (International Conference of Building Officials
JMA Japan Meterological Agency; 1951
SIA Swiss association of engineers and architects
Richter Richter scale
Mod. Mercalli Modified Mercalli scale; 1956
MSK Medvedev-Sponheur-Karnik scale; 1964
Ground acceleration a
g
in m/s
2
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