power transformer erection 1

[elenapredescu]

I need informtion regarding the time and sequency for power transformer, 150 MVA 220 kV, energizing. I read about keeping the transformer about 72 hours no load before energizing. Is there some standards about this subject?

 

[jghrist]

The manufacturer will have an instruction manual. See ABB for an example.

 

[stevenal]

See IEEE C57.93 Table 5.

 

[bacon4life]

The recommendation per my most recent Hyundai 230 kV purchase is 24 hours at no load, plus at least 36 from breaking vacuum to energizing. Additional time is needed in very cold conditions.

 

[stevenal]

Guess I could read Table 5: For your voltage class 12 hours minimum, 24 recommended.

 

[elenapredescu]

Are you so kind to give me table 5? I'll apreciate your answer. Thanks.

 

[elenapredescu]

Are you so kind to give me the table 5?
I'll appreciate your kindness. Thank you.

 

[elenapredescu]

Are you so kind to give me the table 5?
Thank you.

 

[elenapredescu]

Sorry for writing three times but my intenet is not working properly.

 

[stevenal]

The standard is copyrighted, but see above for the relevant info.

 

[elenapredescu]

Thank you. I know that the standards are copyrighted but I have only ANSI C57.93-1995 and the table 5, that you mentioned, is missing. Maybe you reffer to C57.93-2007. This is the reason for asking you to give me only the table 5.
Are you so kind to help me giving only table 5?