Self-healing fuse itself is not easily aged. The so-called aging phenomenon of the self-healing fuse refers to the tightness of the joint between the metal electrodes at both ends and the self-healing fuse material.
The self-recovery fuse has strict rolling technology control, which ensures that the performance of the self-recovery fuse will not deteriorate in 1000 hours under the harsh environment of 85℃ and 85% relative humidity. After many actions, the resistance value of the fuse is higher than the initial resistance value, and after the resistance value exceeds the maximum action parameter R1max, the fault performance is that the manufacturer cannot guarantee that it will not operate for 1H while maintaining the current.
The number of failed operations is related to the recovery time after each operation of the self-recovery fuse, and the longer the time, the more times it can bear. The test condition of self-recovery fuse is to recover 120 seconds after each operation, and the performance is guaranteed after 1000 working cycles. The failure of self-recovery fuse includes multiple actions, long-time actions, voltage exceeding rated action voltage Vmax, fault current exceeding rated action current Imax, and its failure is characterized by performance parameter decline or open circuit. The factors are summarized as follows:
(1) short circuit: that is, the current flows directly from the anode to the cathode through wires without passing through any electrical equipment. It is especially easy to burn out the power supply, resulting in short circuit fault on the line side and fusing speed;
(2) Overload: When the load current of the self-recovery fuse exceeds its rated current, the fuse will blow when heated for a long time;
(3) Pulse: In the circuit, the current suddenly increases (for example, the circuit is open or the power supply is unstable), and the instantaneous large current will cause the fuse to blow;
