| 摘要 |
<p>PURPOSE:To easily detect different rated primary currents only by changing a set value. CONSTITUTION:A first voltage obtained by converting a primary current by a current transformer 12 and a converting resistance 13 is switched by a rated primary current setting circuit 14 so as to have a prescribed value at a first rated primary current or a second rated primary current to output a secondary voltage proportional to the primary current. In a rated current area output circuit 23, the second voltage is received, and a prescribed range for each rated primary current is outputted as current information, and in an overcurrent area output circuit 27, the second voltage is received, and the current information for an overcurrent area exceeding the prescribed range of each rated primary current is outputted. Namely, since the rated current area output circuit 23 and the overcurrent area output circuit 27 are directly operated by the second voltage, the precision can be improved.</p> |
