Multifunctional verifying device for sulfur hexafluoride density relay

Abstract

The invention discloses a multifunctional verifying device for a sulfur hexafluoride density relay. The multifunctional verifying device has more precise verifying functions, and can verify a plurality of relays at a time, recover sulfur hexafluoride gas and calibrate a temperature compensation value of the sulfur hexafluoride density relay. The multifunctional verifying device comprises a verifying component and a high-low temperature test chamber, wherein a separation board is arranged inside a test cavity of the high-low temperature test chamber; a test frame for supporting the density relay and a standard pressure gauge is arranged on the separation board; side plates of the test cavity are all insulation boards; a pipeline opening for allowing a communicating pipe to penetrate throughis formed in the insulation board on one side of the test cavity and is a through hole; the verifying component contains a controller; the controller is connected with a touch display screen, a to-be-verified density relay and the standard pressure gauge; and the verifying component also contains an inflating pipeline.

Description

Technical field [0001] The invention relates to a sulfur hexafluoride relay calibration device, which is specifically used for the calibration of sulfur hexafluoride density relays. Background technique [0002] SF6 (sulfur hexafluoride) electrical products have been widely used in the power sector, industrial and mining enterprises, and promote the rapid development of the power industry. How to ensure the reliable and safe operation of SF6 electrical products has become one of the important tasks of the power sector. SF6 gas density relay is one of the key components of SF6 electrical switches. It is used to detect the change of SF6 gas density in the body of SF6 electrical equipment. Its performance directly affects the reliable and safe operation of SF6 electrical equipment. The SF6 gas density relay installed in the field does not operate frequently. After a period of time, it often exhibits inflexible action or poor contact contact. Some of the temperature compensation per...

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Problems solved by technology

[0003] The current sulfur hexafluoride density relay calibrator has a single function. Whether it is on-site calibration or centralized calibration, the calibration device can only be judged by comparing the pressure sensor value with the contact change and indication value of the density relay to be calibrated. Whether it is accurate or not, there is no more accurate and richer calibration function; at the same time, in the actual operation and maintenance of substations, we found that the temperature is too low (about minus 30 ℃) can easily cause the pointer SF6 density relay to alarm (or lock ), in the prior art, it is the first time to determine the on-site fault and carry out large-scale maintenance, but in fact, we found that in some cases, it was finally found that the temperature supplement function of the sulfur hexafluoride density relay did not work, such a To cause a lot of time, manpower and money waste; therefore, the correct detection step should be to detect whether the pointer type sulfur hexafluoride density relay is accurate and whether the temperature compensation of the pointer type sulfur hexafluoride density relay is accurate; for the pointer The detection of the type sulfur hexafluoride density relay currently includes a large number of equipment, specifically after being inflated through the air source, a high-precision sensor is used to compare the pointer value of the sulfur hexafluoride density relay; but there is currently no detection of the temperature compensation function, so As a result, the detection process of the sulfur hexafluoride density relay is not perfect

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