Oil surface thermograph for transformer

Abstract

The invention relates to an oil surface thermograph for a transformer, which is used for detecting and controlling oil temperature of the transformer and comprises a casing 1, a thermograph control module 2, terminals 3, a mechanical counter 4, a temperature sensor 5 and a synchronous pulley component 6, wherein the thermograph control module 2, the terminals 3, the mechanical counter 4, the temperature sensor 5 and the synchronous pulley component 6 are arranged in the casing 1. The thermograph control module 2 is arranged in a shell 7 and connected with the temperature sensor 5 and the synchronous pulley component 6 and comprises a temperature signal regulation and acquisition circuit, a single-chip microcomputer, a data transmission circuit, a temperature signal conversion circuit, a motor module, a relay and a watchdog. Complex temperature sensors and elastic transmission parts thereof are omitted, no complex fan control mechanism is adopted, and precision measuring, displaying and signal transferring of the oil surface temperature of the transformer and intelligent interaction with a secondary instrument or computer are realized by means of the simple and reliable structure and the mechatronic sensing and control technique. Further, since all control circuits are mounted in the closed casing of an electromagnetic interference resistant design, the oil surface thermograph is high in electromagnetic interference resistance and simple in maintenance, reliability is greatly improved while the service life is greatly prolonged, and manufacturing cost is greatly reduced.

Description

technical field [0001] The invention relates to a transformer oil surface temperature instrument for detecting and controlling transformer oil temperature. Background technique [0002] During the continuous use of the transformer, its internal temperature will increase with the increase of the use time. This requires monitoring the temperature of the oil surface of the transformer and starting the cooling device in time to avoid accidents of the transformer equipment due to excessive temperature. Ensure the normal operation of the grid system. [0003] Searching through the search database of the National Patent Office, at present, only the BWY-804J (TH) series transformer oil level thermometer produced by Dalian Jinzhou Instrument Factory has applied for a national patent (patent authorization number: ZL01241472.7). This transformer oil The surface thermometer is mainly composed of a shell, a temperature control instrument placed inside the shell, terminal blocks, a fan c...

AI Technical Summary

Problems solved by technology

Therefore, this kind of transformer oil level thermometer has the disadvantages of low temperature display and control accuracy, complex structure, easy failure and damage, and short service life.

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