Current transformer for transformer substation

Abstract

The invention discloses a current transformer for a transformer substation, which prolongs the position of an oil drain port, expands the function of the oil drain port and is very practical. In addition, by improving the top protective cover and the interior of the top protective cover, the height of an expander can be observed more clearly, and the operation process of the expander can be conveniently limited through a limiting assembly integrated inside the expander. According to the invention, a tee joint is mounted at an oil discharge port and comprises an oil discharge port interface used for being mounted with the oil discharge port, a reserved interface used for being connected with a plug or an oil pressure monitoring sensor and an interface used for being connected with a leading-down sampling pipe; a leading-down oil discharging valve is mounted at the bottom of the leading-down sampling pipe; a window is formed in the top protective cover, a circle of rubber frame is installed on the inner wall of the window, an indication line observation window is installed in the rubber frame, and the outer edge of the rubber frame is coated with a circle of waterproof glue; the expander is coated with a circle of position indication line; and an expander oiling and oil taking limiting assembly is mounted in the top protective cover.

Description

technical field [0001] The invention relates to an improvement of a current transformer in a substation, in particular to an outdoor oil-immersed current transformer used in a substation. Background technique [0002] The use of oil-immersed current transformers in substations in Xinjiang is very common. This current transformer is used outdoors. In recent years, we have paid great attention to the safe operation of this equipment and have invested in research and development to monitor the state of oil-immersed current transformers. Specifically The oil pressure and oil temperature sensor is used to monitor the oil to achieve our monitoring purpose; [0003] Through long-term operation and the implementation of a series of safe and stable operation technologies, we have a more detailed experience in the use of oil-immersed current transformers. At the same time, we have also found some structural defects that are not conducive to daily reliable use. This application is dedi...

AI Technical Summary

Problems solved by technology

[0004] (1) When we installed sensors on the oil outlet at the bottom of the oil-immersed current transformer and the position of the expander at the top, we found that the position of the oil outlet was too high, and it was very inconvenient to install components or take oil samples later. There is no expansion interface for the oil port. Once it needs to be installed, the position of the oil outlet can only be modified on site, which takes a long time and causes a long power outage

[0005] (2) We fill the expander on the top of the oil-immersed current transformer with oil or observe the liquid level daily (the change of the expansion height of the expander reflects the change of the oil position inside the expander), and the observation window of the expander is easily stained , the height position is not easy to be clearly and accurately detected. In addition, when the expander is filled with oil or components are installed, the expander must be in a fully extended state, otherwise the oil filling will not be standard or the oil will be sprayed out when the oil injection hole is opened; this special It is very troublesome to make the tools on site every time or reserve them in advance; the on-site production is mainly to limit the position of the expander after stretching. It is easier for experienced personnel to make on-site production, and it is not easy to cause safety hazards, but for those who lack experience Very uncontrollable for people

[0006] (3) When installing oil-immersed current transformers in substations, at present, deep pits must be dug on site, and the supporting pipe columns are buried in deep pits like street lamp poles, and fixed by concrete. The procedures of the on-site operation process are relatively complicated and time-consuming It is labor-intensive and is often affected by the weather. If there are hidden dangers in the supporting structure of the supporting pipe column, it will lead to a great safety hazard in the operation of the oil-immersed current transformer.

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