PFC1 Fast Power Factor Controller0 pages

Cognito Quam Industrial Electronics, Control, Robotics and Automation PFC1 Fast Power Factor Control 1er The PFC1 controller measures the phase angle between the voltage and current vectors in a single- or three- phase line system and activates its three-step output to switch in and out of the line compensating capacitor banks. The current is detected with a standard current transformer (CT) in one of the line phases and measurement duration is selectable from 1 to 15 seconds. The PFCl's fast response makes it particularly suitable for very fast dynamic compensation of frequently-started, low-duty or variable loads such as lifts, conveyors, pumps, fans and office lighting rows. 24 VDC outputs to directly drive capacitor bank switching SSRs or PLCs External control input enables control by master devices or thermal protection sensors Parameter DIP switch sets the initial activation conditions and measurement sampling time The PFC1 controller The controller is active while the CT secondary current is above 0.5 A (10 % of range) and enabled at the external control input. On activation the outputs are initialized as selected at the DIP switch until the first measurement is completed. If the measured power factor is above 0.95 the outputs remain unchanged until the next measurement is completed. The outputs are incremented (the next step output is activated) for inductive power factors below 0.95 and the activated output protection time-out has elapsed. Correspondingly, the outputs are decremented (the highest step output is deactivated) for capacitive power factors below 0.95. r.1 Feb12 Copyright © 2008-2012. Cognito Quam Ltd, PO Box 67212, Melissia, Athens 15102, Greece. Tel/fax: +30.210.8049475 - http://www.cognitoquam.gr 1