A top-layer oil temperature monitoring device and oil temperature monitoring method of an oil-immersed transformer

Abstract

The invention relates to the technical field of monitoring devices and discloses an oil-immersed transformer top oil temperature monitoring device. The device comprises a transformer box; an oil feeding pipe is fixedly mounted on the left side of the top end of the transformer box; an oil storage tank is fixedly installed at the end, away from the transformer box, of the oil feeding pipe; a valveis fixedly mounted on the inner wall of the oil feeding pipe; a supporting frame is fixedly mounted on the left side of the transformer box; the top end of the transformer box is movably connected with an insulator; the weight of the weight block of the device enables a monitoring combination line in a force return device to be stretched and extend to the top of cooling oil in the transformer box;the weight of the weight block is equal to the buoyancy of the cooling oil to the weight block and the tension of the force return device to the weight block, and therefore, the weight block can always float on the top layer of the cooling oil, the oil temperature of the top layer can be monitored all the time; and the device is immune to the influence of the circulating cooling oil of a coolingsystem, so that the condition that the position of a monitoring system for monitoring oil temperature is not correct can be avoided, and therefore, monitored oil temperature can be accurate.

Description

technical field [0001] The invention relates to the technical field of monitoring devices, in particular to a top-layer oil temperature monitoring device and an oil temperature monitoring method of an oil-immersed transformer. Background technique [0002] The oil-immersed transformer is one of the important equipment in the power supply and distribution system of industrial and mining enterprises and civil buildings. It reduces the 10(6)kV or 35kV network voltage to the 230 / 400V bus voltage used by users. This type of product is suitable for AC 50 (60) Hz, three-phase maximum rated capacity of 2500kVA, can be used outdoors, and can be installed on a pole when the capacity is 315kVA and below, the ambient temperature is not higher than 40°C, not lower than -25°C, and the maximum daily average temperature is 30°C , the maximum annual average temperature is 20°C, the relative humidity does not exceed 90%, and the altitude does not exceed 1000m. [0003] However, the current o...

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Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a top-layer oil temperature monitoring device and oil temperature monitoring method of an oil-immersed transformer, which has the advantage of monitoring the top-layer oil temperature and solves the problem that the oil temperature cannot be monitored

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