Electronic quick oil pressure relay device for oil filling power device

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 ...

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

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