| 摘要 |
<p>Several circuit breakness may be used in parallel. Each circuit breaker has an input terminal connected to a line at a first voltage and the output terminals of all the circuit breakers are connected to a line at a second voltage. In each circuit breaker there is a fuse; it is placed in the direct line between the input and the output. Each circuit breakers includes a circuit contg. a lamp, to signal when the fuse has burned out. This circuit may be turned on by a pushbutton switch which is usually in the open condition.</p> |
