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4.3
Climatic Ambient Conditions
Parameter
Minimum air temperature
(cold)
Maximum temperature
(dry heat)
Damp heat
Temperature gradient
Relative air humidity
Absolute air humidity
Air pressure
The listed values apply for the use in open-air cabinets for bay devices. The products can be ex-
posed to sun and heat. They can be exposed as well to air flow caused by draught in buildings,
e.g. by open windows or influences of technical processes.
Bedewing is possible for a short time, e.g. during the course of maintenance tasks (not in opera-
tion). Condensation, precipitations, water and icing are not permitted.
Heating and cooling is used to maintain the necessary conditions, especially in case of great dif-
ferences between indoor and outdoor climate.
The conditions of this class normally occur in living and working areas, e.g. in production rooms
for electronic and electrotechnical products, telecontrol rooms, storage rooms for valuable and
sensible devices.
42
Value
Test standard
-25°C
IEC 60068-2-1
72 hs.
Ad
+70°C
IEC 60068-2-2
72 hs.
Bd
40°C
IEC 60068-2-78
93% RH
48 hs.
£ 30°C/h
5...97%
£ 29 g/m
3
70...106 kPa
(up to 3000 m)
SICAM RTUs, SICAM MIC System Description
Ambient Conditions
Cl.
Product stand.
Cl.
IEC 60870-2-2
C2
IEC 60654-1
C2
IEC 60870-2-2
C2
IEC 60654-1
C3
IEC 60870-2-2
C2
IEC 60654-1
C2
IEC 60870-2-2
C2
IEC 60654-1
C2
IEC 60870-2-2
C2
IEC 60654-1
C2
IEC 60870-2-2
C2
IEC 60654-1
C2
MC6-054-2.00, Edition 07.2014
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