GAS DENSITY RELAY WITH ONLINE SELF-CHECKING FUNCTION, AND CHECKING METHOD THEREFOR

摘要

Provided are a gas density relay with an online self-checking function, and a checking method therefor. The gas density relay comprises a gas density relay body, a first pressure sensor, a second pressure sensor, a temperature sensor, a pressure regulation mechanism, an online checking contact signal sampling unit and an intelligent control unit. The gas density relay body comprises: a shell; and a first sealed gas chamber, which is in communication with an insulating gas chamber of an electrical device, and a second sealed gas chamber, which is filled with a standard compensation gas, the sealed gas chambers being located inside the shell, wherein the first pressure sensor is in communication with the first sealed gas chamber, and the second pressure sensor is in communication with the second sealed gas chamber; the pressure regulation mechanism is in communication with the second sealed gas chamber; and the intelligent control unit regulates the rise and fall of the pressure in the second sealed gas chamber by controlling the pressure regulation mechanism, so that the gas density relay body generates a contact action to complete checking work of the gas density relay without the need for a maintenance staff member to perform checking on-site, thereby improving the working efficiency and reducing the sealing requirements of a power grid.