| 摘要 |
PURPOSE:To control the automatic power factor regulator, by comparing the reactive power detected at reactive power detector with that set at reactive power setting section then transmitting the throw-in or interrupting signal of the capacitor. CONSTITUTION:The output from PT 20, CT 21 in the circuit is provided to detect the reactive power at the reactive power detector 22 then cimpared at the comparator 24 with the setting level of throwing or interrupting point of capacitor in reactive power setter 23, and when the detected level is departed from the setting level throw-in signal 25 or interrupting signal 26 is transmitted to function aux. relay 4, stepping relays 5, 6 thus to switch throwing and interrupting relays 1, 2, 3 for capacitor through the contacts 7, 8. Consequently each relay has two contacts 11 and 14, 12 and 15, 13 and 16 for throwing and interrupting repectively, thereby control circuit for automatic power factor regulator having simplified circuitry can be obtained. |
