Oil-free vibration-resisting sulfur hexafluoride gas density relay

Abstract

This invention relates to a no-oil anti-vibration SF6 gas density relay capable of monitoring the gas density of SF6 in operation and ensuring the safely operation of the gas insulation devices including a frame, an indicating devices on the frame, a driving device controlling operation of the instruction device, a primary standard gas chamber and an operation chamber are set on the frame, a drive plate is set between the two chambers controlling the work of the instruction device via the drive device, a switch matched to the drive plate is installed on the frame and led to the terminal box y a signal line, which has the advantages of accurate compensating temperature, great contact force of the contact point, strong reliability and leakage-proof.

Description

Technical field: [0001] The present invention relates to a kind of sulfur hexafluoride (SF 6 ) gas density, an oil-free shock-resistant sulfur hexafluoride gas density relay to ensure the safe and reliable operation of gas-insulated equipment. Background technique: [0002] With the continuous improvement of power grid operation on the safety, reliability and maintenance-free requirements of high-voltage electrical equipment used in substations, sulfur hexafluoride (SF 6 ) gas, as a safe and effective insulating and arc-extinguishing medium, is widely used in high-voltage electrical equipment, and SF 6 The insulation and arc extinguishing ability of the gas depends on the density of the gas, sulfur hexafluoride (SF 6 ) The reduction of gas density will deteriorate the insulation performance and arc extinguishing performance of high-voltage electrical equipment, which will bring hidden dangers to the quality of high-voltage electrical equipment, so it is necessary to monito...

AI Technical Summary

Problems solved by technology

[0003] At present, the pointer density relays circulating on the market use the working principle of bimetal compensation gas for temperature compensation, realize the control function with the help of electric contacts, and use the buffering effect of the damping fluid filled in the shell to absorb shock, so as to eliminate The impact vibration caused by the breaking of high-voltage electrical equipment has the advantages of small size and intuitive density display, but it has low temperature compensation accuracy, small contact force, small contact capacity, easy ablation of contacts and short circuit, reliable Poor performance, easy leakage of damping fluid, high requirements on the tightness of the watch case, etc.

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