At present the United States already discovered can alleviate transformer is hydric generated new mechanism. This one new mechanism involves core to fold piece of an oily film decompose. Analyse an opinion through the experiment, hydric be the generation inside the limits that amounts to 200 ℃ of 120 ℃ ～ in core temperature. Begin, hydric generated rate is rapidder, tend after a few days gently.
Make clear to the analysis of transformer of certain high capacity, be not partial discharge problem to also can be generated hydric. In the core excitation experiment of 60Hz, already observed can alleviate hydric generate. Lift as voltage with core heat temperature lifts, can appear taller hydric. The transformer oil of large volume just can be decomposed when a few Baidu generate hydric with the hydrocarbon.
Document data makes clear, divide partial discharge beyond, undermentioned all sorts of circumstances all can generate hydric: The catalysis of 1) oil analyses: Through making clear to the assaying of stainless steel, it is when 180 ℃ of 100 ℃ ～ hydric volatilize. 2) falls in inferior temperature, did not happen when oil before decomposing, oxygen also can arise hydric. Once aerobic content is under 2000ppm, hydric stop to volatilize. 3) is in iron component, for example core steel piece before rusting, water and air also will arise hydric. Of 4) water electroanalysis already was considered as hydric generated source. The gas mixture that 5) cent receives switch to exist also can arise hydric. If 6) is oily without very good vacuumize, remain possibly one part is hydric.
Oily appearance is when 200 ℃ , the aeriform numerical value that creates in the day is as follows: Hydric 210ppm; Methane 35ppm; CO125ppm;CO2 1074ppm; Ethylene 18ppm.
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