A system and method for monitoring leakage current in a heater (20) connected to a heater power supply by a power cable (14) having a first power lead (16) conducting an inlet current defining an inlet current direction and a second power lead conducting an outlet current defining an outlet current direction that is opposite the inlet current direction. The system includes a differential current electromagnetic sensor (50) having a magnetic core (52) with a center region (54) that the power cable passes through one or more times. The magnetic core has an air gap (58) in which a magnetic flux sensing device is positioned and configured to provide a signal that is representative of magnetic flux across the air gap, which is indicative of a difference between the inlet current and the outlet current. This difference defines the leakage current.
DIFFERENTIAL LEAKAGE CURRENT MEASUREMENT FOR HEATER HEALTH MONITORING
DIFFERENTIELLE LECKSTROMMESSUNG ZUR ÜBERWACHUNG DES ZUSTANDS EINER HEIZVORRICHTUNG
MESURE DU COURANT DE FUITE DIFFÉRENTIEL POUR LA SURVEILLANCE DE L'ÉTAT D'UN DISPOSITIF DE CHAUFFAGE
29.09.2021
Patent
Elektronische Ressource
Englisch
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