HYDAC FILTER SYSTEMS TCU Series, Инструкция по эксплуатации и техническому обслуживанию

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TransformerCare Unit Status monitoring
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BeWa TCU 3472805b en 2011-07-05.doc 2011-07-05
6 - Cycle time of the degasification and dewatering unit (average of 5
cycles)
7 - Other transformer-specific details.
13. Send the sample to the following laboratory as quickly as possible with all
information required:
Västerås PetroleumKemi AB / VPdiagnose
Försegelvägen 2
723 48 Västerås
SWEDEN
Phone: +46 21 17 22 30
The volume of the gas sampling bag is determined in the laboratory and the gas it
contains is analyzed via a gas chromatograph.
The filling period can be used to calculate the quantity of the respective gas in
ml / day and to determine the gas formation rate. The values as ml / day can be
converted to ppm / year via the oil quantity in the transformer and the number of
days in a year.
If the DGA performed simultaneously reveals an increase in the gas, it can be added
to the gas formation rate determined.
The details can then be compared with typical gas formation rates e.g. to EN60599 /
IEC 10/629:
Ranges of typical 90% gas formation rates observed in power transformers (all
types), in µl/l / year = ppm / year:
Common expansion vessel Separate expansion vessel
Gas H
2
CH
4
CO CO
2
C
2
H
4
C
2
H
6
C
2
H
2
C
2
H
2
35 10 260 1700 32 5 21 0
… … … … … … … …
Guideline va
lues
132 120 1060 10000 146 90 37 4
According to EN60599 / IEC 10/629, the upper values can be assumed as guideline
values if the transformer manufacturer has not provided data.