Siemens Sivacon S8 Planning Information page 87

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
Ground acceleration a
14
12
10
8
6
4
2
0
IEC 60721-2-6
Legend:
IEC 60721-2-6
IEC 60068-3-3
UBC
JMA
SIA
Richter
Mod. Mercalli
MSK
Fig. 9/3: Comparison of seismic scales for the classification of seismic response categories of SIVACON S8
84 SIVACON S8 Planning Principles – Conforming to standards and design-verified
in m/s 2
g
Kat 1 / K = 2 Kat 2 / K = 2 Kat 3 / K = 2
5
AG5
4
AG4
AG3
AG2
3
AG1
2
1
IEC 60068-3-3 UBC
Zone classification acc. to the "Map of natural hazards by Munich Reinsurance"
Class of ground acceleration "AG" in g acc. to Table 3 of this standard
Zone classification acc. to the Uniform Building Code (International Conference of Building Officials
Japan Meterological Agency; 1951
Swiss association of engineers and architects
Richter scale
Modified Mercalli scale; 1956
Medvedev-Sponheur-Karnik scale; 1964
Kat 1 / K = 1 Kat 2 / K = 1
VI
4
3
V
2b
Z3b
2a
Z3a
IV
1
Z2
III
Z1
I,II
JMA SIA V 160
Kat 3 / K = 1
8 X
7 IX
6 VIII
5 VII
4 VI
1 3 I V
...
...
Richter Mod. Mercalli MSK
X
IX
VIII
VII
VI
V
I IV
...