Sulfur hexafluoride gas density relay

Abstract

The invention relates to a sulfur hexafluoride SF6 gas density relay with low pressure. In the structure of the density relay, a control part and a display part are separately designed, the control part comprises a Bourden tube, a temperature compensation element and a joint operating arm; the display part also comprises a Bourden tube and a temperature compensation element; the two Bourden tubes are welded on a base, the other ends of the Bourden tubes are connected with an end sea, the end seat is connected with one end of each temperature compensation element, and the other ends of the temperature compensation elements are connected with the joint operating arm or a clock mechanism. Therefore, the display part and the control part are not mutually influenced when working, and the display precision and the display range of the display part are not limited, and the electric property and the service life of the relay are greatly improved.

Description

technical field [0001] The invention relates to a relay, in particular to a relay used in sulfur hexafluoride (SF 6 ) SF on electrical equipment 6 Gas density relays, especially a low pressure SF 6 Gas density relay. Background technique [0002] SF 6 Electrical products have been widely used in the power sector, industrial and mining enterprises, and promoted the rapid development of the power industry. Guaranteed SF 6 The reliable and safe operation of electrical products has become one of the important tasks of the power sector. SF 6 The arc extinguishing medium and insulating medium of electrical products are SF 6 Gas, no air leakage can occur, if there is an air leakage, the SF cannot be guaranteed 6 Electrical products operate reliably and safely. So monitor SF 6 SF for electrical products 6 The density value is very necessary. Now used to monitor SF 6 Density generally adopts a mechanical pointer density relay, which has when SF 6 When an electrical prod...

AI Technical Summary

Problems solved by technology

[0007] 1. Due to this SF 6 The structure of the gas density relay, in the measurement of SF 6 When the gas pressure is low, and when the shell diameter is less than 65 mm, it is difficult to drive the micro switch to work due to the soft Bourdon tube, so that the reliable operation of the system cannot be guaranteed.

[0008] 2. Due to this SF 6 When the Bourdon tube of the gas density relay is soft, the display value cannot be well synchronized, and it is difficult to ensure the reliable operation of the system

[0009] In summary, all current low pressure SFs with case diameters up to 65mm 6 The electrical performance of the gas density relay is not good enough, or the contact contact is not stable enough, the anti-vibration performance is not good, the working life is not long, or the application range is greatly affected by the altitude

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