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Will the self-healing fuse age.lighting fuse rating

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2023-08

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　　The raw materials of self restoring fuses are not prone to aging themselves. The aging condition of the self-healing fuse device is due to the close connection between the metal electrodes on both sides of the device and the raw materials of the self-healing fuse. By multiple actions, the resistance of the self restoring fuse will be higher than the original resistor. When the resistance value exceeds the main parameter R1max of the resistor after a large action, the fault indicates that the manufacturer cannot ensure that the machine equipment does not operate while maintaining the current IH.

　　The raw materials of self restoring fuses are not prone to aging themselves. The aging condition of the self-healing fuse device is due to the close connection between the metal electrodes on both sides of the device and the raw materials of the self-healing fuse. The self recovery fuse has strict requirements for rolling process operation, ensuring that the performance of the self recovery fuse is not easily degraded after 1000 hours under harsh conditions of 85 ℃ and 85% air humidity.

　　By multiple actions, the resistance of the self restoring fuse will be higher than the original resistor. When the resistance value exceeds the main parameter R1max of the resistor after a large action, the fault indicates that the manufacturer cannot ensure that the machine equipment does not operate while maintaining the current IH. The frequency of invalid actions is related to the repair time after each action of PPTC. The longer the repair time, the more frequent it can be undertaken. The self recovery fuse detection standard is 120 seconds after each action to repair, and the performance of the system is guaranteed after 1000 action cycles.

　　The most likely faults of a self restoring fuse include multiple actions, long-term actions, operating voltage exceeding the rated operating standard voltage, and fault current exceeding the rated operating current. The fault mainly manifests as a decrease in the main performance parameters or a short circuit.

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