Siemens Sivacon S8 Planning Information

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SIVACON S8 Planning Principles – Further planning notes
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Tab. 8/3: Normal service conditions for SIVACON S8 switchboards
Environmental
conditions
Class
Environmental parameters including their limit values
(Definition acc. to IEC 60721-3-3)
Measures
Climatic 3K4
Low air temperature -5 °C
1),3)
High air temperature
+40 °C
3)
+35 °C (24 h mean)
2),3)
Low relative humidity 5 %
High relative humidity 95 %
Examples for relation (air temperature - air humidity)
at 40 °C: 50 %
3)
at 20 °C: 90 %
3)
Low absolute humidity 1 g/m
3
High absolute humidity 29 g/m
3
Speed of temperature change 0.5 °C min.
Low air pressure 70 kPa
High air pressure 106 kPa
Sunlight 700 W/m
2
Heat radiation None
Condensation possible
Install switchboard
heating
Wind-borne precipitation No
Water (except rain)
See special service
conditions
Ice formation No
1) According to IEC 60721-3-3, a minimum temperature of +5 °C is permissible.
2) Higher values are permissible on request
3)
Data in accordance with IEC 61439-1; any other, not identified values in accordance with IEC 60721-3-3
8.3 Environmental conditions
The climate and other external conditions (natural foreign
substances, chemically active pollutants, small animals)
may affect the switchboard to a varying extent. The influ-
ence depends on the air-conditioning equipment of the
switchboard room.
According to IEC 61439-1, environmental conditions for
low-voltage switchboards are classified as:
• Normal service conditions (IEC 61439-1,
section 7.1)
• Special service conditions (IEC 61439-1,
section 7.2)
SIVACON S8 switchboards are intended for use in the
normal environmental conditions described in Tab. 8/3.
If special service conditions prevail (Tab. 8/4), special
agreements between the switchboard manufacturer and
the user must be reached. The user must inform the switch-
board manufacturer about such extraordinary service
conditions.
Special service conditions relate to the following, for exam-
ple:
• Data about ambient temperature, relative humidity and/
or altitude if this data deviates from the normal service
conditions
• The occurrence of fast temperature and/or air pressure
changes, so that extraordinary condensation must be
expected inside the switchboard
• An atmosphere which may contain a substantial pro-
portion of dust, smoke, corrosive or radioactive com-
ponents, vapours or salt (e.g. H
2
S, NO
x
, SO
2
, chlorine)
The occurrence of severe concussions and impacts is con-
sidered in the section Chapter 9.3 "Seismic safety and
seismic requirements".
In case of higher concentrations of pollutants (Class > 3C2)
pollutant reducing measures are required, for example:
• Air-intake for service room from a less contaminated
point
• Expose the service room to slight excess pressure (e.g.
injecting clean air into the switchboard)
• Air conditioning of switchboard rooms (temperature
reduction, relative humidity < 60%, if necessary, use
pollutant filters)
• Reduction of temperature rise (oversizing of switching
devices or components such as busbars and distribution
bars)
Further information is available from your Siemens contact.

Siemens Sivacon S8 Specifications

General

Brand	Siemens
Model	Sivacon S8
Category	Industrial Equipment
Language	English