TRANSFORMATION METHOD FOR GAS DENSITY RELAY, AND GAS DENSITY RELAY HAVING ONLINE SELF-CHECK FUNCTION AND CHECK METHOD THEREOF

摘要

A gas density relay having an online self-check function and a check method thereof, and a transformation method for a gas density relay, which are applied to high-voltage and medium-voltage electrical devices. The gas density relay comprises a gas density relay body (1), a gas density measurement sensor, a pressure regulation mechanism (5), a valve (4), an online check contact signal sampling unit (6), and a smart control unit (7). The pressure regulation mechanism (5) regulates the pressure to rise and fall, so that the gas density relay body (1) makes a contact action; the contact action is transferred to the smart control unit (7) by means of the online check contact signal sampling unit (6); the smart control unit (7) detects, according to a density value during the contact action, an alarm and/or a block contact signal action value and/or a return value of the gas density relay body (1). Check of the gas density relay can be completed without the need of onsite operation by the maintenance personnel; furthermore, a remote transmission function is also provided so that maintenance is not needed, thereby greatly improving the reliability of the power grid, improving the operation efficiency, and reducing the operation and maintenance costs.