Rockwell Automation 1407-CGCM Combination Generator Control Module - Manual (Page 9)

Rockwell Automation Publication 1407-UM001G-EN-P - April 2013
9
Chapter
1
General Information
Introduction The Combination Generator Control Module (CGCM unit) is a
microprocessor-based control and protection device. The CGCM unit is
designed to integrate with a Logix family programmable controller to provide
generator control, protection and synchronization functions. Programmability of
system parameters, regulation settings, and protective functions enable the
CGCM unit to be used in a wide range of applications.
Functions The following sections outline the functions of the unit.
Generator Regulation and Control Functions
This list contains the generator regulation and control functions:
• Four excitation control modes
• Automatic voltage regulation (AVR)
• Manual or field current regulation (FCR)
• Power factor (PF)
• Reactive power (VAR)
• Soft start voltage buildup with an adjustable ramp in AVR and FCR
control modes
• Over-excitation (OEL) and under-excitation (UEL) limiting in AVR,
VAR, and PF control modes
• Under-frequency compensation (Volts/Hertz)
• Line drop compensation
• Auto-tracking between operating modes and between redundant CGCM
units
• Automatic transfer to a back-up CGCM unit in redundant systems
• Generator paralleling with reactive droop compensation or cross-current
(reactive differential) compensation
• Generator paralleling with real power load sharing
• Synchronizing for one or two circuit breakers