Ambient Conditions
42 SICAM RTUs, SICAM MIC System Description
MC6-054-2.00, Edition 07.2014
4.3 Climatic Ambient Conditions
Parameter Value Test standard Cl. Product stand. Cl.
Minimum air temperature
(cold)
-25°C
72 hs.
IEC 60068-2-1
Ad
IEC 60870-2-2 C2
IEC 60654-1 C2
Maximum temperature
(dry heat)
+70°C
72 hs.
IEC 60068-2-2
Bd
IEC 60870-2-2 C2
IEC 60654-1 C3
Damp heat 40°C
93% RH
48 hs.
IEC 60068-2-78
Temperature gradient £ 30°C/h IEC 60870-2-2 C2
IEC 60654-1 C2
Relative air humidity 5…97% IEC 60870-2-2 C2
IEC 60654-1 C2
Absolute air humidity £ 29 g/m
3
IEC 60870-2-2 C2
IEC 60654-1 C2
Air pressure 70…106 kPa
(up to 3000 m)
IEC 60870-2-2 C2
IEC 60654-1 C2
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.
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