
The SF6 gas density relay, like other manometers, will have a certain drift in its alarm and latching values after a period of use; In addition, because the contact action of the density relay is not frequent, the contact action may be insensitive or ineffective. If not inspected, there is a security risk. Check the density relay using the SF6 device charging process: (1) Temperature has a large impact, and it is difficult to ensure accuracy.
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