Fareastelectronics under the brand name of AGIE manufactures a range of reactive power controller of various types, which operate on the following measuring and controlling principle:

Reactive and active power panel, are calculated from voltage and current. The actual cosø is constantly compared at the target cosø and the difference between these two values serves as a basis to determine the compensating reactive power required. Capacitors in any size can be used in the automatic mode of operation. No pre-selected switch program is required, because the controller will always select the optimum switch sequence. When switching capacitors, the reactive KVAR output of each step is determined and stored. This enables permanent supervision of the reactive power Output of each individual capacitor step.

In this way the number of-switching operations is considerably reduced. Due to the permanent supervision .of capacitor stages, AGIE power factor relays do not require a fixed switching sequence when energizing capacitor steps for compensation. AGIE power factor control relays are pre-set at the Factory for immediate service following installation. However, the customer can also, select his own switching parameters such as switching time per step.

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