초록 ▼

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 inp

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.

대표청구항 ▼

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] An electronic relay for a multiphase electric load, said electronic relay comprising:a plurality of sensor devices that supply a phase current for each phase;a threshold voltage rectifying circuit tha

[ What is claimed as new and desired to be secured by Letters Patent of the United States is:] [1.] An electronic relay for a multiphase electric load, said electronic relay comprising:a plurality of sensor devices that supply a phase current for each phase;a threshold voltage rectifying circuit that receives an alternating supply signal and outputs a rectified signal having a period, a minimum voltage condition, and a maximum voltage condition; anda microcontroller circuit that calculates a power factor or a power supply voltage that is a function ofat least one of the phase currents andthe period of the rectified signal.