What Causes a Fuse to Blow Again After Replacement?
1 Answers
This situation is generally caused by an internal short circuit in the wiring. The excessive short-circuit current burns out the fuse. Below are the specific reasons for repeated fuse blowouts: 1. Voltage instability: Unstable voltage nearby can cause frequent changes in appliance power, leading to fluctuating current through the fuse and its eventual burnout. 2. Excessive power: Using too many appliances simultaneously with high power exceeds the fuse's normal current-carrying capacity. 3. Fuse issues: Aging fuses, prolonged use, and continuous current flow cause the fuse to heat up due to its inherent resistance. Over time, the fuse becomes thinner, resistance increases, and it eventually burns out. Additionally, long-term storage can cause fuses to thin due to friction and slow oxidation by air.