| 摘要 |
PURPOSE:To sustain a control target power level without interrupting the load by connecting a demand controller with a Seebeck commander for commanding reduction of output frequency from a motor inverter or the output voltage from a lighting circuit inverter when the target power level is exceeded. CONSTITUTION:A demand controller 1 receives power pulses from a pulse detector 7 to grasp the working electric energy and operates the demand value, daily electric energy, daily load rate, etc., every time limit. When a contract electrrc energy is reached, a Seebeck commander 2 delivers an (a)-contact switching command to the demand controller 1. Consequently, a motor inverter 4 under control of the demand controller 1 reduces the output frequency and a light circuit inverter 6 reduces the voltage. This constitution allows to sustain the peak power below a control target level without cutting each load. |
