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Dry-out type
Installing a replacement power module that is either: not new, or not in sealed packaging
Installing a new replacement power module (in sealed packaging prior to installation)
Required minimum coolant temperatures in relation to ambient temperatures are presented
below.
Coolant
temperature
(°C)
-45 -40
For converter-specific dry-out procedure, see the circuit diagrams delivered with the converter
and appropriate firmware manual.
Note: Inadequate dry-out creates a risk for component failure and insulation breakthrough
if there still is moisture inside the converter.
ABB reserves right to change the dry-out procedure based on examinations and tests.
Automatic software-controlled dry-out
￭
Some of the latest versions of the ACS880 wind turbine converter variants by ABB are
equipped with automatic software-controlled dry-out procedure, that sends dry-out requests
to turbine PLC automatically. The turbine PLC needs to be pre-programmed to be able to
handle the converter dry-out requests and send heating requests to cooling system heater.
Basic principle of the automatic dry-out procedure is similar to the manual dry-out, but the
converter calculates standstill times and requests dry-out procedure automatically.
Converter/turbine operator does not need to evaluate the need of dry-out procedure.
For converter-specific dry-out procedure, see the circuit diagrams delivered with the converter
and appropriate firmware manual.
-35
-30
-25
-20
-15
-10
Ambient temperature (°C)
60
55
50
45
40
35
30
25
20
-5
0
5
10
15
20
Cooling and heating 125
Dry-out time
2 h
0 h
25
30
35
40
45
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