| 摘要 |
PROBLEM TO BE SOLVED: To provide a low current detecting device which easily detects the trip state of an inverter device provided on a load side of a motor-driven pump, etc., from a control panel side which supplies a power source to the load side with no signal line provided. SOLUTION: Current sensors 21 and 22 for detecting the current on a power line, comparators 23A and 23B for judging the detection current value of the current sensor to be a specified low-current value or less, timer 24 which judges a condition of a specified low-current value or less has lasted for a specified time, and output circuits 25 and 26 which output signal based on the judging result of the timer 24, are provided.
|
