SUBMERSIBLE MOTOR PUMP AND AUTOMATIC STARTING AND STOPPING METHOD FOR SUBMERSIBLE MOTOR PUMP

摘要

PROBLEM TO BE SOLVED: To provide a submersible motor pump having the convenient and, highly reliable function of automatically starting and stopping and its automatic starting and stopping method. SOLUTION: The submersible motor pump has a temperature sensor 48 to sense the temperature of a motor part 2, a memory device 40 to store the tendency of temperature change classified by operating modes, and an arithmetic device 42 to control the supply of the power to the motor part 2 on the basis of the signal given by the sensor 48 and the tendency of temperature change stored in the memory device 40.