Micom P721, Technical Manual

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Technical Data P72x/EN TD/A11
MiCOM P721/P723 Page 7/18
4. ENVIRONMENT
Temperature IEC 60068-2-1 : 1993 Storage –25 °C to +70 °C
IEC 60068-2-2: 1993 Operation: –25 °C to + 55 °C
–25°C to 70° (*)
(*) The upper limit is permissible for a single 6
hour duration within any 24 hour period.
Humidity dam heat IEC 60068-2-78:2001 56 days at 93% RH and 40 °C
Enclosure protection IEC 60-529: 2001 Dust IP50 (whole case), Front IP 52,
Back IP 10
Sinusoidal Vibrations IEC 60255-21-1:1998 Response and endurance, class 2
Shocks IEC 60255-21-2:1998 Response and withstand, class 2
Shock withstand & Bump IEC 60255-21-2:1998 Response and withstand, class 1
Seismic IEC 60255-21-3:1993 Class 2
Corrosive Environments :
Per IEC 60068-2-60: 1995, Part 2, Test Ke, Method (class) 3
Industrial corrosive environment/poor environmental control, mixed gas flow test.
21 days at 75% relative humidity and +30°C
Exposure to elevated concentrations of H²S, NO², Cl² and SO².