Apfc Relay Model Pfr 1001
Description: APFC Relay Model PFR 1001, a compact (96 x 96 mm) front panel-mounting type unit is used for controlling switch on/off cycle of up to 4 capacitor banks. Industrial establishments generally install static capacitor banks drawing leading reactive power to compensate lagging reactive power drawn by inductive loads (motors, drives, furnaces and mills), to avoid penalties on low power factor imposed by electricity boards. This schematic substantially improves the PF of the system. Since the load pattern may not be uniform throughout any working day in an industrial unit, the capacitive kVAR required to compensate the inductive load may vary from time to time and thus imposing limitations on manual switching of capacitor banks. The PF/kVAR controller (conventionally known as power factor correction relay or PFCR) is particularly useful in improving PF of power systems subjected to frequent load variations. The controller can maintain the power factor of the system within desired range by sensing the system PF and then, switching on or off the connected capacitor banks automatically, as per the load requirements when used along with capacitor banks in the electrical system. This unit can be a useful device in designing electrical sub-systems aiming for energy conservation and reduction in energy bills. It is supported with built-in sensitive 2.5 digit electronic PF meter having a range of .00 to 1.00 (lag and lead) with negative sign for indicating lagging PF. An option for cyclic switching sequence of capacitor banks and optimized timing cycle with due allowance for capacitors to discharge to a safe value is provided in this unit.
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