| 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.
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