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Feed water detection device in transformer oil

A technology of transformer oil and detection device, applied in the field of detection, can solve problems such as slow detection speed, and achieve the effect of fast detection speed and good early warning information

Inactive Publication Date: 2014-04-16
WOLONG ELECTRIC GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the problem of slow detection speed of existing detection devices for water content in transformer oil, the present invention provides a detection device for water inflow in transformer oil

Method used

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  • Feed water detection device in transformer oil
  • Feed water detection device in transformer oil

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Experimental program
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Effect test

Embodiment 1

[0020] The detection device for water ingress in transformer oil includes a probe 1 , a power supply 2 and an alarm 3 . There are multiple probes 1 , which are respectively arranged at the bottom of the transformer oil tank 6 and the bottom of the drain outlet 7 of the oil conservator. The probes 1 include a negative contact 11 and a positive contact 12 . Both ends of the power supply 2 are electrically connected to the negative contact 11 and the positive contact 12 respectively. The alarm 3 is connected in series in the loop formed by the probe 1 and the power supply 2 .

[0021] Transformer oil is petroleum hydrocarbon mineral oil. The pure transformer oil is composed of neutral hydrocarbons and has a non-polar molecular structure. It has good physical and chemical properties and stable electrical characteristics. It is often expected that transformer oil should have good insulating properties and be free from moisture, but this is not the case. Whether it is new oil from...

Embodiment 2

[0029] This embodiment is basically the same as Embodiment 1 and its variations, except that the distance between the negative contact 11 and the positive contact 12 is 0.3 mm; the thickness of the negative contact 11 and the positive contact 12 is 0.2 mm.

[0030] Theoretically speaking, the detection accuracy can be further improved by keeping the distance between the negative contact 11 and the positive contact 12 as small as possible under the premise of ensuring no contact. However, in actual use, when the negative contact 11 and the positive contact 12 are very close, although the transformer oil has good insulating properties, due to its thin thickness, the surge pulse generated at the moment the power supply 2 is turned on Or the pulse caused by interference can easily break through the negative contact 11 and the positive contact 12 , so that the probe 1 is turned on and the alarm 3 has false alarms. Therefore, preferably, the distance between the negative contact 11 ...

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Abstract

The invention provides a feed water detection device in transformer oil. The feed water detection device comprises a plurality of probes, a power supply and an alarm device, wherein the plurality of probes are respectively arranged on the bottom of a transformer oil tank and the bottom of a contamination discharging port of an oil storage cabinet, each probe comprises a negative contact and a positive contact. Two ends of the power supply are respectively and electrically connected with the negative contact and the positive contact. The alarm device is serially connected into a loop consisting of the probes and the power supply. Since water is excellent in conductivity, and the speed of water settling to the bottom of the transformer oil tank or the contaminant discharging port of the oil storage cabinet is far higher than the speed of oil dissolved into the water, the feed water detection device has the advantages of high detection speed and high detection precision.

Description

technical field [0001] The invention relates to the detection field, and in particular to a detection device for water ingress in transformer oil. Background technique [0002] Transformer oil is an important part of oil-immersed transformers. It not only has the functions of insulation and heat dissipation, but also plays the role of arc extinguishing. Therefore, the quality of the transformer oil directly affects the quality of the transformer and the reliability of the power supply of the power grid. Among the many factors affecting the quality of transformer oil, the water content in transformer oil plays a decisive role, and the water content plays a decisive role in the insulation of transformer oil. Excessive water content in the oil forms a "water bridge" under high pressure, greatly reducing the insulation of transformer oil, which in turn leads to discharge and short circuit between equipment, and even explosion in severe cases. [0003] At present, the commonly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/06G01M3/40
Inventor 范庆耀王伟孙长山孙勇
Owner WOLONG ELECTRIC GRP CO LTD
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