SF6-gas density relay

Abstract

The invention discloses an SF6-gas density relay comprising a base, a main Bourden tube, a compensation Bourden tube, a plurality of microswitches and regulating parts corresponding to the microswitches, wherein one end of the main Bourden tube is welded on the base and is communicated with the base, and the other end is welded on a choke plug, whereas one end of the compensation Bourden tube is welded on the choke plug, and the other end is welded on a terminal block; sealing gas is filled in the compensation Bourden tube, and the compensation Bourden tube takes the temperature compensation effect on the density relay; the signal output contact of the density relay adopts the microswitches, thereby thoroughly solving the problems that temperature compensation is difficult, the contact is poor and the density relay is influenced by altitude and barometric pressure. Moreover, the SF6-gas density relay has very high vibration resistance, can completely overcome the oil leak problem due to not being filled with silicone oil, and can be well applied to SF6-gas electrical equipment. An SF6-gas density switch adopting the technical scheme has reasonable design, stable and reliable work, more accurate temperature compensation performance and higher accuracy.

Description

technical field [0001] The invention relates to a relay, in particular to a relay used in SF 6 (Sulfur hexafluoride) SF on electrical equipment 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 product leaks, it can display the density value on site, ...

AI Technical Summary

Problems solved by technology

[0007] 1. Due to this SF 6 The gas density relay is to measure SF 6 The relative pressure of the gas is greatly affected by the change of altitude and atmospheric pressure, so it cannot guarantee the reliable operation of the system

[0008] 2. Due to this SF 6 The temperature measured by the gas density relay is the temperature at the density relay. 6 It is not suitable for occasions where the temperature difference between the device and the density relay is large, so its application range is small

[0009] In summary, all current SF 6 The temperature compensation performance of the gas density relay is not good enough, or the contact contact is not stable enough, or the application range is greatly affected by the altitude

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