What Are the Hazards of Irregular Inspection of SF6 Relay?

SF6 Relay, like other pressure gauges, will experience a certain drift in its alarm and lock-in values after a period of use; in addition, due to the infrequent action of the density relay contacts, the contacts may become insensitive or fail to operate. If not inspected, there is a safety hazard. SF6 Relay Quality issues are as follows:

• The anti-vibration performance is not up to standard, after a strong impact during the switching operation, faults such as pointer sticking, contacts permanently failing to operate (no action or continuous action), and excessive deviation may occur.

• Due to oil leakage, the anti-vibration performance of the SF6 Relay decreases, and after a strong impact during the switching operation, faults such as pointer sticking, contacts permanently failing to operate (no action or continuous action), and excessive deviation may occur.

• Due to the commonly used magnetic-assist electrical contacts in the SF6 Relay, the contact closure force is small, the time is slightly longer, when the contacts rust, the contacts will not conduct or have unreliable contact. For the oil-free type, the magnetic-assist electrical contacts are exposed to the air, making them prone to oxidation or dust accumulation, resulting in poor or unreliable contact; for the oil-filled type, although the magnetic-assist electrical contact points are immersed in silicone oil, over time, after several operations, their contact performance may decrease, and because the oil film has an insulating effect, the contact points may also have poor or unreliable contact.

• Due to manufacturing quality issues, the temperature compensation is inaccurate, leading to serious overcompensation or undercompensation.

• Due to inadequate aging or material issues, over time, drift may occur, causing a significant increase in inaccuracy (stress has not been relieved).

• Due to design flaws, there may be failures (never operating) at low temperatures.

• Due to design flaws, significant variations may occur in operation and display values at high temperatures.

• For relative cavity-type density relays, due to internal or external reasons, the standard cavity may leak, resulting in large errors or failures in operation.

• Due to severe vibrations during transportation, relay failures and changes in accuracy may occur.

• Due to component quality issues, relay failures and changes in accuracy may occur after a period of time.

• If the vent holes in the casing are not loosened or if there are sealing issues, changes in internal casing pressure may cause changes in accuracy.

• Corrosion by rainwater or corrosive gases can lead to relay failures and changes in accuracy.

• Improper use, such as improper installation, can also affect usage.

• Due to process issues, relay failures or changes in accuracy may occur.

• Switch manufacturers or the SF6 Relay may use inferior products or components to reduce costs.

• Electrical performance: Insulation issues may occur.

• Sealing performance may occur.

Related Article for Reference