Message Board Thread - "50MVA power transformer conservator tank"

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50MVA power transformer conservator tank ricky 3/18/2008
Hey guys good day;
Attached is a thermal image of a 50MVA power transformer conservator tank, How do you rate it? Is this a proof of a low oil insulation level? Is the recorded maximum temperature not enough to raise the oil level? Be informed that thermal image is taken during peak hour and transformer load is 25MW. Below are the recorded information. Thank you very much and more power...


Date 2/21/2008
Image Time 6:00:33 PM
Filename IR_0167.jpg
Image Camera Type P65 NTSC
Image Serial Number 23404247
Image Camera Lens FOV 24
Emissivity 0.87
Object Distance 10.0 m
Reflected Temperature 26.8 °C
Atmospheric Temperature 26.8 °C
Relative Humidity 81.0 %
Max Temperature 44.0 °C
Min Temperature 22.4 °C
Ar1 Max. Temperature 32.1 °C
Ar2 Max. Temperature 29.1 °C
Ar1 Min. Temperature 29.9 °C
Ar2 Min. Temperature 26.8 °C
Ar1 Average Temperature 31.1 °C
Ar2 Average Temperature 27.7 °C
Dt1 Value 3.0







 
Re:50MVA power transformer conservator tank ricky 3/18/2008
Another thermal image taken at different angle..
 
Re:50MVA power transformer conservator tank kfs 3/19/2008
Isn't this just showing the oil level in the conservator? There should be a sight glass or an indicator to confirm the level. The thermal image/temperature rises don't appear to be unusual.
 
Re:50MVA power transformer conservator tank ricky 3/20/2008
kfs wrote:
his just showing the oil level in the conservator? There should be a sight glass or an indicator to confirm the level. The thermal image/temperature rises don't appear to be unusual.
As the generated report is forwarded to the maintenance engineer on that particular substation, he confirmed that their oil level indicator is defective, and their low oil level annunciation alarmed often times. Anyway, said transformer is due for annual PMS next month and lets see what the real score is...
 
Re:50MVA power transformer conservator tank IESC MAN 12/31/2008
ricky wrote:
As the generated report is forwarded to the maintenance engineer on that particular substation, he confirmed that their oil level indicator is defective, and their low oil level annunciation alarmed often times. Anyway, said transformer is due for annual PMS next month and lets see what the real score is...
Most main power xfmrs that have consevator tanks have a bladder inside. The bladder allows for the expansion of oil and keeps the main tank full at all times. What I believe you may be looking at is warm oil on bottom and a cool bladder on top.
 
Re:50MVA power transformer conservator tank MBLANCO 2/4/2009
IESC MAN wrote:
Most main power xfmrs that have consevator tanks have a bladder inside. The bladder allows for the expansion of oil and keeps the main tank full at all times. What I believe you may be looking at is warm oil on bottom and a cool bladder on top.
Is correct most of then have.
The blader is taken the enviroment temperature.
 


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