Fuse installation and troubleshooting solutions

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This post was last edited by goldliyang on 2020-7-10 at 14:44. If the proper procedures are not followed during the installation of fuses, the likelihood of circuit abnormalities and failures increases. So how can we avoid problems with fuses during installation? And how to resolve faults that occur after the self-resetting fuse is installed? I. Fuse Installation 1. Try not to touch the fuse itself during installation. If the fuse is damaged, it cannot be used; it must be replaced with a new one promptly. 2. When installing the fuse, check whether the contacts at both ends of the fuse are in good condition. 3. The rated current of the fuse must be less than or equal to the fuse’s rated current. 4. The voltage of the circuit must be less than or equal to the rated voltage of the fuse. 5. After a fuse blows, when replacing it, pay attention to the following: ① Use a fuse of the same size and material; do not make it thicker or thinner arbitrarily, nor use other wires that are not prone to blowing, to avoid accidents. ②The power supply must be turned off in advance; it is absolutely not allowed to pull out the fuse while it is still powered on in order to check it. When replacing the fuse, insulating gloves and insulating shoes, along with other insulation measures, must be used. 6. The temperature of fuses, fuse links, and the base should not exceed 60°C; if it exceeds 60°C, appropriate replacements are required. II. Solutions for fuse failures 1. Circuit fault resolution: Examine the circuit to identify the faulty section, checking for issues such as incorrect wiring, circuit overload, or aged wires. 2. Fuse failure resolution: When a fuse fails, it blows under normal circuit operation but does not blow when the circuit is overloaded. In the former case, the rated current and voltage of the fuse may be inappropriate; replacing it with a suitable fuse will resolve the issue. In the latter case, the fuse has an excessively high melting point; it is necessary to replace it with a fuse that has a lower melting point. To determine this, one can compare the rated voltage and rated current of the fuse with those of the circuit’s operating voltage and current. Normally, the rated current of a fuse is 1.5 to 2 times that of the circuit’s normal operating current. 3. Resolution of other abnormal faults: If other abnormal faults cause the circuit to burn out, don’t panic. First, turn off the main power supply to the circuit or disconnect the switch, and then analyze the cause of the fault step by step, starting by checking the circuit and fuses. For safety reasons, insulation measures must be taken; if the fault cannot be identified, contact a professional electrician to resolve it.