Service Conditions; Normal Service Conditions - ABB Uniswitch Operation And Maintenance Manual

1.3 Service conditions

1.3.1 Normal service conditions

Normal service
conditions
ABB
Uniswitch Operation and
Maintenanc e Manual
The switchgear is intended for use in normal indoor service conditions
as defined in Table 1.1 from the relevant IEC standards. If the
conditions where the switchgear are to be installed deviate from the
normal service conditions defined in the IEC standards (IEC 60694), it
has to be agreed separately with the manufacturer.
Table 1.1 Normal indoor service conditions according to IEC standards.
Ambient air temperature
Maximum
Maximum 24 h average temperature
Minimum 24 h average temperature
Recommended (minimum)
Altitude above sea level
Maximum
Conditions of humidity
Average value of relative humidity (24 h)
Average value of relative humidity (1 month)
Pollution
The ambient air must not be significantly polluted by dust, smoke,
corrosive and/or flammable gases, vapors or salt.
+ 40°C
+ 35°C
- 5°C
+ 5°C
1000 m
≤ 95 %
≤ 90 %
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UNI S14GB 05-02