Constant pressure water supply control device

摘要

PROBLEM TO BE SOLVED: To provide a constant pressure feed water control device capable of increasing the life thereof by making driving time of a motor uniform.;SOLUTION: When driving time of a motor driven by a PWM inverter 77 continues for a specified period, a relay is controlled so as to drive a motor in a stopping state from the PWM inverter 77, and controlled so as to stop the motor driven by the PWM inverter 77.;COPYRIGHT: (C)2003,JPO