Prophi

Product description:

Functional principle

The single-phase electronic measuring system collects the reactive and effective current ratios of the network through the current and voltage measurement. Using the current from one phase and the voltage from the other two phases, the reactive power controller calculates the necessary reactive power to achieve the set target power factor.

The capacitor steps are switched on or off if any differences occur and the reactive power controller differentiates between the switching of capacitors through contactors or thyristors.

The control through capacitor contactors is optimised; this means that the reactive power controller achieves the cos-phi target with a minimum of switch actions. The transistor outputs for the almost immediate control of semiconductors compensate any difference.

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