| 摘要 |
An electronic relay having a current sensor device (C1, C2, C3), logic inputs (3) and an electronic circuit (4) provided with processing means capable of calculating, from the current signal (I) supplied by the current sensor device and a rectified voltage signal (V) supplied by one of the logic inputs, the value of the power factor of the motor (cos phi ) and/or the value of the power supply voltage (U) of the motor.
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