ABB RET615 Product Manual page 30

Transformer Protection and Control
RET615
Product version: 4.0
Table 20. Environmental conditions
Description
Operating temperature range
Short-time service temperature range
Relative humidity
Atmospheric pressure
Altitude
Transport and storage temperature range
1) Degradation in MTBF and HMI performance outside the temperature range of -25...+55 ºC
2) For IEDs with an LC communication interface the maximum operating temperature is +70 ºC
Table 21. Environmental tests
Description
Dry heat test
Dry cold test
Damp heat test
Change of temperature test
Storage test
1)
For IEDs with an LC communication interface the maximum operating temperature is +70
30
Value
-25...+55ºC (continuous)
-40...+85ºC (<16h)
<93%, non-condensing
86...106 kPa
Up to 2000 m
-40...+85ºC
Type test value
• 96 h at +55ºC
• 16 h at +85ºC 1)
• 96 h at -25ºC
• 16 h at -40ºC
• 6 cycles (12 h + 12 h) at +25°C...
+55°C, humidity >93%
• 5 cycles (3 h + 3 h)
at -25°C...+55°C
• 96 h at -40ºC
• 96 h at +85ºC
1MRS756891 F
1)2)
Reference
IEC 60068-2-2
IEC 60068-2-1
IEC 60068-2-30
IEC60068-2-14
IEC 60068-2-1
IEC 60068-2-2
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ABB