Siemens Sivacon S8 Planning Information

83
SIVACON S8 Planning Principles – Conforming to standards and design-verified
2
3
4
5
6
7
8
9
10
11
1
Acceleration values
There is a simple interrelation between storey acceleration
a
f
and local ground acceleration a
g
:
a
f
= K x a
g
with amplification factor K according to Tab. 9/5. Ground
acceleration depends on the local seismic conditions.
If the switchboard is installed at ground level and directly
on the ground-level foundation, this acceleration factor –
provided that there are no further specifications – can be
regarded as the acceleration which acts on the mounting
plane of the switchboard (K = 1, a
f
= a
g
).
Depending on how the switchboard is fastened, an amplifi-
cation of the ground acceleration becomes effective. This
dependency is taken into account with the amplification
factor K (Tab. 9/5).
If there is no information about the storey acceleration or
the installation of the switchboard, K = 2 is applied, mean-
ing double the value of the specified ground acceleration is
regarded as the stress the switchboard will be exposed to.
If there are no specifications regarding the directional
assignment of the acceleration parameters, the values are
referred to the horizontal directions (x, y). Conforming to
international standards, the vertical accelerations are lower
and are usually factored in with 0.5 to 0.6 times the hori-
zontal acceleration.
9.3 Seismic safety and seismic
requirements
The SIVACON S8 switchboard is available in earth-
quake-proof design for seismic requirements. The tests
examine its operability and stability during and after an
earthquake. As illustrated in Tab. 9/4, the results of the
earthquake tests are specified for three categories.
Test specifications
• IEC 60068-3-3, German version from 1993:
Environmental testing; Seismic test methods for
equipments – Guidance
• IEC 60068-2-6, German version from 2008:
Environmental testing; Tests – Test Fc: Vibrations,
sinusoidal
• IEC 60068-2-57, German version from 2000:
Environmental testing; Tests – Test Ff: Vibrations – Time-
history and sine-beat method
• KTA 2201.4, 2000: Design of Nuclear Power Plants
against Seismic Events
• IEC 60980, 1989: Recommended practices for seismic
qualification of electrical equipment of the safety system
for nuclear generating stations
• UBC, Uniform Building Code, 1997: Chapter 16,
Division IV
Testing is performed in three axes with independently
generated time histories in three axes in accordance with
IEC 60068-2-57.
Tab. 9/4: SIVACON S8 system characteristics under earthquake
conditions
Category 1: Operability during the earthquake
a
f
= 0.6 g (ZPA)
Category 2: Operability after the earthquake
a
f
= 0.75 g (ZPA)
Category 3: Stability
a
f
= 1.06 g (ZPA)
a
f
= floor acceleration (acceleration in the mounting plane of the switchboard)
ZPA = zero period acceleration
g = ground acceleration = 9.81 m/s
2
Tab. 9/5: Acceleration factor K for SIVACON S8
K factor Fastening of the switchboard
1.0
On rigid foundations or supporting structure of
high stiffness
1.5 Rigidly connected with the building
2.0
On stiff supporting structure which is rigidly
connected with the building
3.0
On supporting structure of low stiffness,
connected to the building

Siemens Sivacon S8 Specifications

General

Brand	Siemens
Model	Sivacon S8
Category	Industrial Equipment
Language	English