When the start switch knob is pulled to the starting position, the special energy storage motor for circuit breaker cannot be rotated. What is going on here? The reason for the analysis is that the battery is not stored properly or the terminal is oxidized and rusted, the joint is loose, and the ground wire is loose, resulting in no power or circuit failure.
Secondly, it is caused by the poor conductivity of the special energy storage motor of the circuit breaker. For example, the carbon brush wear is severe, the pressure of the carbon brush spring is weakened, the carbon brush is stuck in the carbon frame and the grounding is poor, and the electric starter commutator has oil stain. Burning or partial grinding and rounding, resulting in poor contact between the carbon brush and the commutator.
In addition, due to the influence of large current passing, common situations include: burn-in of the starter switch contact of the special energy storage motor for circuit breaker, desoldering of the electromagnetic switch coil and the terminal, or burning of the coil. In addition, it may also be caused by the insulation of the coil of the electric starter being broken, causing a short circuit or grounding between the turns, so that the electric starter cannot work.
Note that the starting time of the special energy storage motor of the circuit breaker should not be too long, otherwise the parallel coil may be burnt out, or the main contact of the electromagnetic switch is not closed when starting, the series coil is still energized, and cannot be separated by the short circuit, and the motor does not turn. At this time, if the start button is not released in time, the series coil is often burned in a short time.