Environmental Performance; General - Siemens Argus 7SR21 Technical Manual

1.4

Environmental Performance

1.4.1

General

1.4.1.1 Temperature
IEC 60068-2-1, IEC 60068-2-2
Type
Operating range
Storage range
1.4.1.2 Humidity
IEC 60068-2-30, IEC 60068-2-78
Type
Operational test (Indoor)
Operational test (Outdoor)
1.4.1.3 Transient Overvoltage
IEC 60255-5
Type
Between all terminals and earth, or
between any two independent circuits
1.4.1.4 Insulation
IEC 60255-5
Type
Between any terminal and earth
Between independent circuits
Across normally open contacts
1.4.1.5 IP Ratings
Type
Installed with cover on
Installed with cover removed
Unrestricted © 2013 Siemens Protection Devices Limited
Level
- 10 °C to + 55 °C
- 25 °C to + 70 °C
Level
56 days at +40 °C and 95 % relative humidity (r.h.)
6 cycles at 24 h between +25 °C (97% r.h.) and +55 °C (93% r.h.)
Level
5.0 kV, 1.2/50 ms 0.5j
Level
2.5 kV AC RMS for 1 min
1.0 kV AC RMS for 1 min
Level
IP 51 from front of relay
IP 10 from rear of relay
IP 20 from front of relay
IP 10 from rear of relay
7SR21 & 7SR22 Performance Specification
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