Leave the disposer unused and record what was happening when protection operated. Repeatedly restoring the supply and trying again is not a safe diagnostic method.
What the observation tells you
Useful details include whether the motor started, whether water was present outside the appliance and which other equipment lost power. Do not assume a trip identifies a failed motor; the supply, control accessory or another connected fault may need investigation. Avoid opening plugs, switches or covers.
A useful next step
Give the engineer the disposer model and a photograph of the accessible device label if safely available. Ask for the electrical fault to be assessed before any return to normal operation.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.