Safety first
Repeated electrical tripping should be treated carefully. Do not keep resetting breakers if they trip again. Do not open control panels unless qualified.
Possible causes
Causes can include motor winding failure, water ingress, damaged cable, seized pump, faulty inverter, overload condition, control panel fault or an issue with the supply circuit.
Information to send
Send photos of the control panel, fault display, pump set, breaker or trip reference, and explain whether the trip happens immediately or only when the pump starts.
Engineer diagnosis
Electrical testing may be needed to separate pump motor faults from cable, control panel, inverter or supply issues.