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Power transformer fault location


Thermal characteristics. Details I have been in the Partial discharge transformer can be divided roughly fever fever fever and exposure to two categories. Discharge to determine the fault location has been described in the previous section, this section will further look for specific parts of the heat and estimate the temperature of the hot spots produced. Conductive due to the transformer circuit (or magnetic) overheating, oil, gas production rate (the speed of the extent of gas generation characteristics) and the transformer load current (or voltage) related to the square, so the rate of gas production can be further analyzed to find a contact with the overheated These features, which are characterized by three-ratio method can not analyze the problem. Three-ratio analysis of each major method to obtain the absolute value of the ratio of the chromatographic analysis, while the gas production rate refers to the multiple chromatographic analysis of the two characteristics of each variation of the gas. Is an example. Jinjiacun substation main transformer SLl a 6300/35, February 1971, the factory, put into operation in December 1979. March 28, 1992 Regular sampling and analysis, the results shown in Table 1. According to IEC regulations: CH content reaches 5 # L / L, H2 content of up to 150 ~ L / L, or total hydrocarbon content of up to 150 ~ L / L, it should be noted, Table 1 March 28,herve leger skirts, 1992, these indicators in future have exceeded the. IEC also reminded CO,Beats By Dre Studio, COz content only big 300 / L, and total hydrocarbon content exceeding the fiber insulation to attract attention. Table 1 transformer oil gases chromatography vL / L Date H: CH · c: H6C: H'C: H: COCO: total hydrocarbons (the transfer p. 56) Table 7 shaft vibration Fm date 1 2 3 4 No. 5 6 7 8 1996-11-024.715.516.159.645.715 '11. o6.6 can be seen from the data in the table, the unit shaft vibration 3 watts y direction by the repair before the 140 ~ m down to 84.3. urn,tods shoes outlet, little change in other data, indicating the balance of the rotor unit changed for the better. 4,5 watt vibration than the repair before the increase, and with running the well, thus we can see the balance of the rotor vibration has little effect on the unit, 4,5-watt unit repair when the vibration is mainly caused by the work not detailed enough . 5 Conclusion This is the first time using dynamic balancing machine maintenance 300MW unit at the scene processing the rotor, but after the efforts of technical staff, only 11 days to complete the work,MBTシューズ 販売店, which not only eliminates the risk of rotor Depot transport, while also reduce the unit's maintenance cycle. With this set of equipment in the field of the rotor journal repair process,vibram five fingers outlet, fully able to meet its precision rotor repair removal standards. After balancing the rotor for low speed also reduces the boot to find the number of high-speed balancing its economic and social benefits are considerable. 1, c: H. Content / C: H content = (1002/55)> 3, three-ratio coded 022, according to the operation of Table 2 is greater than 700 ℃ high temperature fault contact with nature, the overheating temperature T a 3221g +525; 3221gl8.22 +525 = 931 ℃. CO content did not exceed the IEC requirements Note that the value 300 / ~ L / I;, CO: content of more than 300t ~ L / L, and March 28, 1992 compared with October 9, 1991 to increase more, but. March 28, after basically stable. March 28 CH. However, a sudden increase in concentration after little change. Sum is estimated in the conductive loop system failure or poor contact caused by lead, non-magnetic failure. In Table 2 Regression, that the correlation coefficient 7-0.998, 6-3.3x10 a regression slope, regression intercept a = 0.06, which shows good correlation to determine the fault exists in the conducting circuit, due to poor contact . Table 2 and the total hydrocarbon load current incremental found hanging core set of phase A low-pressure side of the pile head through the rear cable connection rod type conductive lower flange due to processing grievances, bad heating, conductive film connected significant discoloration. To determine the correct argument. 3 Conclusion. When abnormal chromatographic analysis, inferred by the three-ratio method for the discharge of heat, or thermal contact, and then by the method described in this article further qualitative and quantitative, to demonstrate that the transformer is positioned to continue to run.
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