1. Áirítear le hábhar tástála rialta claochladáin tástála ardvoltais:
①. Oil sample detection - performance indicators such as withstand voltage and impurities are carried out every three years, which can shorten the period of long-term full-load or overload operation of the transformer.
②The high and low voltage insulation resistance should not be less than 70 percent of the original value (10MΩ), the DC resistance of the winding at the same temperature, the difference between the three-phase average values should not be greater than 2 percent , and it should not be compared with the results of the last measurement. Should be greater than 2 percent .
③The grounding resistance value of the high-voltage test transformer shall be measured once every two years.
④The cycle of cleaning and inspection after a power failure is determined according to the surrounding environment and load conditions, generally half a year to once a year; the main contents include eliminating defects found in the inspection, cleaning the porcelain sleeve, replacing the cracked or aging rubber pad, and checking and tightening the connection points. Oil shortage and replenishment, check and replace the silicone of the respirator, etc.
2. Is iad seo a leanas na modhanna cothabhála laethúla de chlaochladáin tástála ardvoltais:
①,The grounding of the transformer
②The transformer shell should be grounded reliably, the working neutral wire and the neutral grounding wire should be laid separately, and the working neutral wire should not be buried.
③The neutral grounding circuit of the high-voltage test transformer shall use detachable connecting bolts near the transformer.
④The grounding of the transformer equipped with arrester should meet the requirements of the Trinity; that is, the neutral point of the transformer, the grounding of the transformer casing and the arrester should be in one place and grounded together.