Low voltage fault remote alarm device

The invention provides a low voltage fault remote alarm device. The low voltage fault remote alarm device comprises a single-chip microcomputer MCU and a GSM module which is connected with the single-chip microcomputer MCU, wherein the single-chip microcomputer MCU is configured with 18-line commercial electricity switching value monitoring and 2-line switching value input monitoring; the 18-line commercial electricity switching value monitoring accesses the single-chip microcomputer MCU through a sensor and through optoelectronic isolation; the 2-line switching value input monitoring accesses the single-chip microcomputer MCU through a switching value acquisition circuit; a matched LED display screen and a key keyboard for operation are respectively connected with the single-chip microcomputer MCU; the GSM module is matched with at least one hand-held mobile terminal SIM which is used for receiving short messages; the single-chip microcomputer MCU employs a 16-line single-chip microcomputer MCU; a clock circuit and a memorizer are arranged on the single-chip microcomputer MCU; and the single-chip microcomputer MCU is also connected with a buzzer for alarming. The low voltage fault remote alarm device has the advantages of being reasonable in structural combination, being convenient and reliable to use, reducing the total time for fault first-aid repair, accelerating the fault handling speed, and guaranteeing safety of electric power facilities.