Failure analysis of the relay --- bad coil resistance

1. Causes of bad coils

Coil disconnection (surface flaws, wound wound flaws, flux adhesion, etc.)

Heterogeneous coils (coils of different specifications)

Incorrect resistance value (wrong number of turns, wrong wire diameter)

Short circuit etc.

2 . Coil disconnection is a major defect,

          The coil acts as a relay and maintains the operating state to provide the main electromagnetic force

            The part is the coil.