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H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
H01H83/06—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by current falling below a predetermined value
FR1083545D1953-05-191953-05-19Interrupteur automatique à manque de courant ou de tension pour circuits triphasés
ExpiredFR1083545A
(fr)