The invention discloses a self-extinguishing device for a cable. The self-extinguishing device comprises an extinguishing
sprayer, an extinguishing device body, an extinguishing starting button, a connecting rod, a pressure-applying lever, a direct-current
electromagnet, a supporting rods, a wire, an extinguishing starting controller, a
smoke-sensing
temperature measurement probe, an on / off electrified indicator and a device shell, wherein the extinguishing device body is positioned at the bottom of the device shell, the extinguishing
sprayer and the extinguishing starting button are respectively arranged at two ends of the extinguishing device body, the connecting rod, the pressure-applying lever, the direct-current
electromagnet and the wire are connected to the extinguishing starting button in sequence, the support rods are respectively connected to the same sides of the pressure-applying lever and the direct-current
electromagnet, and the extinguishing starting controller, the
smoke-sensing
temperature measurement probe and the on / off electrified indicator are connected to the wire in sequence. The self-extinguishing device mainly aims at fire
outbreak of power cables, can realize self-extinguishing at the earlier stage of the fire, and thus the financial loss caused by spread of the fire can be avoided, and the self-extinguishing device for the cable has the advantages of small size and high extinguishing efficiency and is suitable for extinguishing fire on
electrical equipment.