Siemens 7SR12 Argus - Environmental Performance; General

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 14 of 56
1.5 Environmental Performance
1.5.1 General
1.5.1.1 Temperature
IEC 60068-2-1/2
Type
Level
Operating range
-10 °C to +55 °C
Storage range
-25 °C to +70 °C
1.5.1.2 Humidity
IEC 60068-2-78
Type Level
Operational test
56 days at 40 °C and 93 % relative humidity
1.5.1.3 Transient Overvoltage
IEC 60255-5
Type Level
Between all terminals and earth, or
between any two independent circuits
5.0 kV, 1.2/50 µs 0.5j
1.5.1.4 Insulation
IEC 60255-5
Type
Level
Between any terminal and earth
2.5 kV AC RMS for 1 min
Between independent circuits
Across normally open contacts 1.0 kV AC RMS for 1 min
1.5.1.5 Installation Category
IEC 60255-27
Type
Level
Installation Category (Overvoltage Category)
Class III
1.5.1.6 Pollution
IEC 60255-27
Level
Pollution Degree 2
1.5.1.7 IP Ratings
IEC60529
Type Level
Installed with cover on
Rear IP 10
Front IP 51
Installed with cover removed
Rear IP 10
Front IP 20