Download Spring 2016 C57.13.8 Survey 1

Survey # 1
WG’s survey on revision of clause 6.2.1 to IEEE C57.13.8
Insulating Liquids
Clause 6.2.1 of revision 2 of the Draft for Standard C57.13.8 currently states the following:
6.2.1
Insulating liquids
Transformers shall be filled with a suitable insulating liquid such as
a)
Mineral oil. New, unused mineral oil shall meet the requirements of ASTM D3487.
NOTE 1—IEEE Std C57.106™ Error! Reference source not found. provides information concerning the acceptance and
maintenance of mineral oil, including dielectric test breakdown criteria according to oil application, age, and test method.
b)
Less flammable hydrocarbon fluid. New, unused less flammable hydrocarbon fluid shall meet the
requirements of ASTM D5222.
NOTE 2—IEEE Std C57.121™ Error! Reference source not found. provides information concerning the acceptance and
maintenance of less-flammable fluid in transformers.
c)
Silicone fluid. New, unused silicone fluid shall meet the requirements of ASTM D2225.
NOTE 3—IEEE Std C57.111™ Error! Reference source not found. provides information concerning the acceptance and
maintenance of silicone insulating fluid in transformers.
There are other insulating fluids that may be suitable and are commercially available. At the time of this revision,
neither ASTM specifications nor IEEE guides for use in transformers exist.
The proposal being made is to add natural or synthetic esters to Clause 6.2.1
6.2.1 Insulating liquids
Transformers shall be filled with a suitable insulating liquid such as
a) Mineral oil. New, unused mineral oil shall meet the requirements of ASTM D3487.
NOTE 1—IEEE Std C57.106™ Error! Reference source not found. provides information concerning the acceptance and
maintenance of mineral oil, including dielectric test breakdown criteria according to oil application, age, and test method.
b) Less flammable hydrocarbon fluid. New, unused less flammable hydrocarbon fluid shall meet the
requirements of ASTM D5222.
NOTE 2—IEEE Std C57.121™ Error! Reference source not found. provides information concerning the acceptance and
maintenance of less-flammable fluid in transformers.
c)
Silicone fluid. New, unused silicone fluid shall meet the requirements of ASTM D2225.
NOTE 3—IEEE Std C57.111™ Error! Reference source not found. provides information concerning the acceptance and
maintenance of silicone insulating fluid in transformers.
d) Natural Ester fluid. New, unused natural ester fluid shall meet the requirements of ASTM D6871.
NOTE 4—IEEE Std C57.147™ provides information concerning the acceptance and maintenance of natural ester fluids in
transformers.
There are other insulating fluids that may be suitable and are commercially available. At the time of this revision,
neither ASTM specifications nor IEEE guides for use in transformers exist.
Please indicate your decision in this proposed change by selecting one of the following choices:
1. Reject change with Comment
2. Accept as proposed
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3. Accept as proposed, but with comment
Comment:
Please return your answer to me by 3/15/16
Regards,
David Wallace
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