Method for suppressing copper sulfide generation in oil-filled electrical equipment
AssigneeMitsubishi Electric Corporation
InventorsFukutaro Kato, Eiichi Nagao, Tsuyoshi Amimoto, Satoru Toyama, Kota Mizuno
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Abstract
The present invention is a method for preventing copper sulfide generation in oil-filled electrical equipment having an inhibitor of copper sulfide generation in insulating oil, and the method is characterized in monitoring characteristics of said insulating oil and performing re-addition of said inhibitor at an appropriate moment in accordance with a result of said monitoring.
Claims9
A method for suppressing copper sulfide generation in oil-filled electrical equipment having an inhibitor of copper sulfide generation in insulating oil, the method comprising:
- monitoring an amount of copper in said insulating oil and performing re-addition of said inhibitor in response to detecting copper having a concentration of 0.1 ppm or greater in said insulating oil, or in response to detecting a change of tendency of fluctuation in a copper amount, in accordance with a result of said monitoring.
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Dependencies are inferred from the claim text.