Concern:
When a load on a system exceeds its capacity, the system will fail. When too much current flows through a circuit, it can overheat and cause a fire.
Countermeasure:
Intentionally create a weak spot in the system so it will fail when the loads exceeds a threshold.
The weak spot– the fuse– will overheat and melt (“blow”) when too much current (exceeding amperage of the fuse) flows through the circuit. This interrupts the current before more damage can occur.
By locating the fuse judiciously in the circuit, it will be easy to locate the system failure and replace the fuse. One must determine why the fuse blows and remedy the cause before replacing the fuse with a new one, or it will also blow.
The illustration shows that the fuse gives a visual indication of its demise (text after Chris 2015).
Limitation:
| Triz Description | 3.1: Change an object's structure from uniform to non-uniform, change an external environment (or external influence) from uniform to non-uniform. |
|---|---|
| Image sources | 24 Nov., Chris (2015). “Electrical Fuses | The Home Depot Community.” The Home Depot, community.homedepot.com/howto/DiscussionDetail/Fuses-90650000000CeU9) |
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