AVSR3 Triple Switch Autocalibrating Variable Step Regulator0 pages

Cognito Quam
Industrial Electronics, Control, Robotics and Automation

AVSR3 Triple Switch Autocalibrating Variable Step Regulator
The AVSR3 employs our variable step technology to compensate reactive current in seven steps. It features
three 25 A solid state switches to connect three compensating capacitor banks in and out of the single- or
three-phase line system. At installation no adjustments are required as each capacitor size is detected
automatically making AVSR3 commissioning purely “wire-up-and-play”.
Power supply fuse

Separate control
supply terminals

Current
transformer
terminals

Switch 3
terminals
Switch 3
bypass relay
Overheat
protected
switch 3
solid state
circuit

AVSR3 status LED
display can be
optionally ordered
placed upside-down
or at the back of the
board.

“Enable” input
and “Ready”
output
terminals

Operation DIP switch

Overheat
protected
switch 1 solid
state circuit

Overheat
protected
switch 2 solid
state circuit

Switch 1
bypass relay

Switch 2
bypass relay
Switch 1
terminals

Switch 2
terminals
AVSR3 autocalibrating power factor regulator

The variable step technology provides for different capacitor banks of any size to correct power factor in
practically any arbitary minimum step and correction range size. At every sampling instant, the controller
calculates the required compensation step and connects or disconnects a combination of banks whose sum
is equal or closest to the calculated step value. In the AVSR3, three banks are used and, if sized as x1, x2
and x4 multiples of the smallest required step, provide seven steps of compensating operation. Switch
activation/deactivation happens at every sampling instant as set at the DIP switch between 5 and 30
seconds making the AVSR3 particularly suitable for dynamic power factor (PF) compensation of frequentlystarted, low-duty or variable loads such as lifts, conveyors, compressors, pumps and office lighting.

r.1 Apr13 Copyright © 2012-2013. Cognito Quam Ltd, PO Box 67212, Melissia, Athens 15102, Greece.
Tel/fax: +30.210.8049475 - http://www.cognitoquam.gr
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