ABB ACS880-77CC, Hardware Manual

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Dry-out time Dry-out type
2 h Installing a replacement power module that is either: not new, or not in sealed packaging
0 h Installing a new replacement power module (in sealed packaging prior to installation)
Required minimum coolant temperatures in relation to ambient temperatures are presented
below.
-45 -40 -35 -30 -25 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 45
20
25
30
35
40
45
50
55
60
Coolant
temperature
(°C)
Ambient temperature (°C)
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.
Cooling and heating 125