Why do mechanical interlocking contactors have noise and poor contact

　　Mechanical interlock contactor is blocked, poor contact

　　Cause analysis: 1. Reaction spring falls off, contact spring falls off,

　　2. Contact surface oxidation,

　　3. Foreign bodies on the contact surface.

　　4. Mechanical causes lead to bracket, coil, core card.

　　noise

　　When it's bad, it makes a "MMM" sound. Our popular saying is that suction is not strict.

　　Reason analysis:

　　1. Foreign bodies enter the core. Sometimes dust and oil can also cause noise

　　2. The core short-circuit ring is broken.

　　3. The iron core assembly is not in place, so that the pole surface of the iron core is not consistent.

　　4, coil control voltage is low.