Remote-transmission sulfur hexafluoride gas density relay

Abstract

The invention relates to a remote-transmission sulfur hexafluoride gas density relay which can be applied to sulfur hexafluoride electrical equipment. The remote-transmission sulfur hexafluoride gas density relay comprises a shell (8), a wire holder (15) and a splice (9) are fixedly installed on the outer side of the shell (8) respectively, and a base (5) is fixedly installed in the shell (8). The remote-transmission sulfur hexafluoride gas density relay is characterized by further comprising a bourdon tube (3), one end of the bourdon tube (3) is fixed onto the base (5), the other end of the bourdon tube (3) is connected with one end of a temperature compensation piece (4), the other end of the temperature compensation piece (4) is connected with the input end of a displacement reducing mechanism (7) through a connecting piece, the output end of the displacement reducing mechanism (7) is connected with a pointer (2), and additionally, a dial (1) is further fixedly installed on the base (5). The sulfur hexafluoride gas density relay is high in precision and can realize the density remote-transmission function; the electrical performance of a signal generator is good, and contacting of contacts is good.

Description

technical field [0001] The invention relates to a remote transmission type sulfur hexafluoride gas density relay, which can be applied to sulfur hexafluoride electrical equipment. Background technique [0002] Sulfur hexafluoride electrical products have been widely used in the power sector, industrial and mining enterprises, and promoted the rapid development of the power industry. Ensuring the reliable and safe operation of sulfur hexafluoride electrical products has become one of the important tasks of the power sector. The arc extinguishing medium and insulating medium of sulfur hexafluoride electrical products are sulfur hexafluoride gas, and no gas leakage can occur. If gas leakage occurs, the reliable and safe operation of sulfur hexafluoride electrical products cannot be guaranteed. Therefore, it is very necessary to monitor the sulfur hexafluoride density value of sulfur hexafluoride electrical products. At present, a mechanical pointer type sulfur hexafluoride ga...

AI Technical Summary

Problems solved by technology

The arc extinguishing medium and insulating medium of sulfur hexafluoride electrical products are sulfur hexafluoride gas, and air leakage cannot occur. If there is air leakage, the reliable and safe operation of sulfur hexafluoride electrical products cannot be guaranteed.

[0003] When the contact (alarm or latch) is closed, its closing force only depends on the tiny force of the contact hairspring, even with the magnetic force, it is still very small, so it is extremely afraid of vibration, and the contact closure is not reliable enough

And the most important thing is that when it is oxidized or polluted, the phenomenon of poor contact of electrical contacts often occurs, causing serious consequences

In addition, it is particularly emphasized that the breaking speed of the magnetic-assisted electric contact is relatively slow, and the contact capacity is small, resulting in a short service life.

Therefore, it is difficult to guarantee the electrical performance and life of the density relay. Once a problem occurs, the user has to replace it again, causing economic losses and failing to meet the requirements well.

And most importantly, currently used to monitor SF 6 Such a mechanical SF of gas density 6 Gas density relay to monitor SF 6 Gas density, there are also the following outstanding defects: 1) SF 6 When an electrical product leaks, an alarm signal is issued only when the gas pressure drops to the alarm value. At this time, the SF 6 Gas has leaked a lot

[0005] To sum up, the electrical performance of the current sulfur hexafluoride gas density relay is not good enough, or the contact contact is not stable enough, and the remote transmission function of the density value cannot be realized, and it is difficult to realize the SF 6 SF for electrical equipment 6 On-line monitoring of gas density, so there is an urgent need for a sulfur hexafluoride gas density relay with good electrical performance, reliable contact contact, good shock resistance, and at the same time realizing the function of density remote transmission

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