| 摘要 |
PURPOSE: A switch-integrated voltmeter is provided to reduce a fabrication cost considerably, and to improve the quality of a finished product. CONSTITUTION: An indication part(1) indicates a hydroelectricity voltage of selected lines. R-S, S-T and R-T inter-line voltage display lamps(2, 3, 4) indicate the selected inter-lines. If a switch(5) is pushed, the R-S inter-line voltage display lamp(2) is turned on and an R-S inter-line voltage is displayed through the indication part(1). If a switch(6) is pushed, the lamp(2) is turned off so as to be switched into the lamp(3), so that a voltage is displayed through the indication part(1). If a switch(7) is pushed, the lamp(3) is turned off so as to be switched into the lamp(4), and a measured value of the indication part(1) becomes an R-T inter-line voltage.
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