| 摘要 |
<p>A status-indicating fuse of the electrical system of automobiles, machinery and generally any mechanical device, has parallel with the fine melting wire (4) of fuses an indicator lamp (3), which operates with very low current intensities and which has a large electrical resistance. The entire system of the indicator lamp and the melting wire of the fuse are contained within the protective glass cover of the fuse (2). When the electrical system is functioning normally, current flows through the fuse through the fine melting wire, because this presents a very small resistance in comparison to the parallely connected indicator lamp. At this stage, the indicator lamp does not light. However, for whatever reason a high current passes through the fine wire, this wire melts and the indicator lamp, which is now connected serially to the circuit, illuminates, thus showing the burnt fuse.</p> |
