| 摘要 |
PURPOSE:To make the accurate output indication possible even under the overloaded conditions, by changing the switch to a tap when the meter indicating the output of an induction motor has approached the full scale, and expanding the range of the meter indication by said switch changing action. CONSTITUTION:The output of a differential amplifier 6 is connected to a variable register 35 and to a resistance type potential divider circuit 36 which is connected in series with said variable register 35. A meter 9 is connected to said resistance type potential divider 36 via a switch 37. When the meter 9 has approached the full a scale, the switch 37 is changed to a tap 46. By this changing action, the range of the indication of the meter 9 is expanded, the accurate output can be indicated even under the overloaded conditions. |
