Environmental Conditions And Tests - ABB RET650 Technical Manual

Relion 650 series transformer protection
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Section 19
Technical data
19.10
620

Environmental conditions and tests

Table 552:
Environmental conditions
Description
Operating temperature range
Short-time service temperature range
Relative humidity
Atmospheric pressure
Altitude
Transport and storage temperature range
Table 553:
Environmental tests
Description
Cold tests
operation
storage
Dry heat tests
operation
storage
Damp heat tests
steady state
cyclic
Value
-25...+55ºC (continuous)
-40...+70ºC (<16h)
Note: Degradation in MTBF and HMI performance
outside the temperature range of -25...+55ºC
<93%, non-condensing
86...106 kPa
up to 2000 m
-40...+85ºC
Type test value
96 h at -25ºC
16 h at -40ºC
96 h at -40ºC
16 h at +70ºC
96 h at +85ºC
240 h at +40ºC
humidity 93%
6 cycles at +25 to +55ºC
humidity 93...95%
1MRK 504 135-UEN A
Reference
IEC 60068-2-1/ANSI
C37.90-2005 (chapter 4)
IEC 60068-2-2/ANSI
C37.90-2005 (chapter 4)
IEC 60068-2-78
IEC 60068-2-30
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