Rockwell Automation 1413-CAP-ME-PE Capacitor Bank Controller, Series C - Manual (Page 7)

Rockwell Automation Publication 1413-UM001D-EN-P - November 2010 7
Chapter
1
General Information
Introduction The capacitor bank controller is intended for standard, fixed-function capacitor
banks. The controller consists of standard, off-the-shelf, Allen-Bradley hardware
with the application ladder code necessary to perform power factor correction.
The controller is designed to provide the same base functionality as a fixed-
function capacitor bank controller.
Description of the
Capacitor Bank Controller The capacitor bank controller is a pre-engineered control system containing a
MicroLogix 1400 controller, one or more PowerMonitor 1000 modules, and an
optional human-machine interface (HMI). Pre-engineered ladder logic code in
the controller gathers real and reactive power data from up to four power feeds
(utility feeds and/or generators). The logic operates on the data in standard
engineering units of kVAR and kW and minimizes imported and exported
reactive power by switching up to 10 steps of capacitance. This strategy controls
power factor while reducing the likelihood of voltage surge caused by excessive
kVAR export.
Functions
• Auto configure
• Manual configure
• Discharge timer on each step
• Selectable operating modes
– Manual operation
– First In, Last Out (FILO)
– Balanced, level-out usage of capacitor steps
– Best fit, finds best match of capacitor step to system kVAR needs