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Electronic quick oil pressure relay device for oil filling power device

A technology of electrical equipment and relays, which is applied in the field of electronic quick-acting oil pressure relay devices, can solve problems such as difficulty in action setting, failure of micro switches, inconvenient installation, etc., and achieves a guaranteed level of safety protection, sensitive and fast protection, and guaranteed The effect of service life

Active Publication Date: 2008-04-30
ZHEJIANG ERG TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of mechanical quick-acting oil pressure relay has complex structure, large volume, and inconvenient installation. The action can only be set according to the stroke of the micro switch. It is difficult to set the action. It cannot display the real-time pressure in the transformer oil tank, and can only output the switch value. signal, the micro switch will fail due to moisture and other reasons, the biggest problem is the large dispersion of micro switch action

Method used

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  • Electronic quick oil pressure relay device for oil filling power device
  • Electronic quick oil pressure relay device for oil filling power device

Examples

Experimental program
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Effect test

Embodiment Construction

[0012] An embodiment of the oil-filled power equipment of the present invention is a power transformer. It can be seen from the accompanying drawings that the designed electronic quick-acting oil pressure relay device consists of two separate parts, extension A and extension B. The extension A shown in Figure 1 is installed at the power transformer, and has an independent power supply for the optical fiber communication interface to realize photoelectric conversion. The frequency output type pressure sensor (probe) is connected with the oil tank pipeline, and the pressure signal is accurately detected in real time, and the electrical signal output by it is Through the optical fiber communication interface 1, the optical signal is converted into an optical signal and output by the optical fiber 3 to communicate with the back-end processor, which not only ensures that the communication is not subject to electromagnetic interference from the transformer, but also simplifies its st...

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PUM

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Abstract

The invention relates to an electronic type quick-action oil pressure relay device for oil-charge electrical devices. The relay device comprises an extension set (A) and an extension set (B). The extension set (A) is arranged at the site of an oil-charge electrical device and has an independent power source; and a pressure transducer is communicated with pipelines to an oil tank; the output electric signals of the power source are converted into optical signals through an optical fiber communication interface (1) and then output by optical fiber (3); the extension set (B) is a rear-end processor mounted far away from the oil-charge electrical device, and has an independent power source; an optical fiber communication interface (2) is communicated with the optical fiber communication interface (1) on the extension set (A) through the optical fiber (3), so as to convert the light signals into the electric signals and then input the electric signals into a CPU single chip microcomputer; the CPU single chip microcomputer stores the real-time acquired oil tank pressure data into a large-capacity storage unit, and accurately outputs alarm or protection signals of the switching value.

Description

technical field [0001] The invention relates to an electronic quick-acting oil pressure relay device for oil tank protection in oil-filled power equipment such as a transformer. Background technique [0002] Existing high-voltage and large-capacity power transformers, capacitors, reactors and other oil-filled power equipment are equipped with oil tanks. The insulating oil in the oil tanks will produce some low-molecular hydrocarbons, carbon dioxide and other gases under the action of heat and electricity. These gases can be dissolved in oil, but under abnormal conditions such as overheating and discharge, the speed of gas generation will increase rapidly. If these gases are not discharged in time or the operation of the transformer is stopped, the oil tank will explode. Therefore, the existing oil tank All have snap action oil pressure relays. The traditional mechanical snap action oil pressure relay consists of test hole cover, auxiliary spring, isolation plate, expansion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H5/08G05B15/02G06F17/00
Inventor 陈文联张世荣
Owner ZHEJIANG ERG TECH
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