Parameters for Transformer Oil
Parameters for Transformer Oil
(OP)
Hi Again ! I need help with the following query :
What are the benchmark values for Transformer Grade oil?
I have a testing report ( Dissolved Gas Analysis ) that states the values of Hydrogen,sulphides etc. The lab people insist on a second test to find out the differential values before coming to a conclusion.I am interested to know if there is a set of standard values for dissolved gases.The transfomer in question is a 1000kva, 11Kv/433V Distribution Transformer
What are the benchmark values for Transformer Grade oil?
I have a testing report ( Dissolved Gas Analysis ) that states the values of Hydrogen,sulphides etc. The lab people insist on a second test to find out the differential values before coming to a conclusion.I am interested to know if there is a set of standard values for dissolved gases.The transfomer in question is a 1000kva, 11Kv/433V Distribution Transformer






RE: Parameters for Transformer Oil
ANSI/IEEE C57.014 Guide for the Interpretation of Gases Generated in Oil-Immersed Transformers.
S.D. Myers, A Guide to Transformer Maintenance.
Both cover some of the ratio methods for identifying the type of events. They also give indications of significant concentrations.
By the way, testing again after six months or a year can be a valid conclusion.
RE: Parameters for Transformer Oil
http://www.udeyraj.com/udey/Oil%20Test%20Set.htm
http://www.designergraphix.com/eltel/p4-transfoil.htm
http://www.harristestinglab.com/c14.htm
http://www.morganschaffer.com/
http://www.setransformer.com/quality.html
http://www.morganschaffer.com/labfuran.htm
http://www.hydracen.com/dx/toainfo/toainfo.htm
etc. for more info
RE: Parameters for Transformer Oil
try to interpret the results. send the values either
raj_dev@excite.com
RE: Parameters for Transformer Oil
RE: Parameters for Transformer Oil
IEEE C57.014 does give criteria for classifying the transformer from condition 1 (normal) through 4 (really bad) based on DGA values in a single sample. It'll also provide some discussion to focus you in on what the problem might be. For instance: Hi CO and CO2 - generally thermal overheating. Hi C2H2 - generally arcing. It gets much more involved than just looking at one gas. The standard also provides flowchart for applying the Roger's ratio and Dorenburg methods.
RE: Parameters for Transformer Oil
RE: Parameters for Transformer Oil
RE: Parameters for Transformer Oil
http://www.usbr.gov/power/data/fist/fist3~30/3~30_4~4.htm
http://www.usbr.gov/power/data/fist/fist3~30/3~30_4.htm
for more info on DGA
RE: Parameters for Transformer Oil
RE: Parameters for Transformer Oil
http://ieee.org/ (IEEE Std C57.104-1991)
http://www.iec.ch/ (IEC 599)