Description
The Allen-Bradley 1407-CGCM is an advanced ControlLogix Generator Control Module developed by Rockwell Automation. Designed to integrate seamlessly into the ControlLogix chassis, this highly specialized module provides comprehensive digital control, protection, and monitoring for small to medium-sized synchronous generators. It combines auto-synchronization, voltage regulation, excitation control, and generator protection functions into a single, high-performance slot module. By leveraging the Backplane communication capabilities of ControlLogix systems, the 1407-CGCM eliminates the need for complex standalone control panels and extensive discrete wiring.
Product Specifications
- Model Number: 1407-CGCM
- Manufacturer: Allen-Bradley (Rockwell Automation)
- Product Series: ControlLogix System
- Function: Generator Control and Protection Module
- Dimensions: 135 mm x 35 mm x 142 mm (Standard single-slot ControlLogix module)
- Weight: 0.45 kg (1.0 lbs)
- Country of Origin: United States (USA)
- Sensing Voltage Input: 100 to 480 Vac nominal (three-phase, 50/60 Hz)
- Sensing Current Input: 1A or 5A secondary from external CTs
- Excitation Output Power: Integrated Pulse Width Modulated (PWM) field current control
- Operating Temperature: 0°C to +60°C (32°F to 140°F)
- Communication Interface: ControlLogix Backplane, RS-232/RS-485 configuration ports
Applications
- Power Generation Facilities: Used in peak-shaving plants, standby power installations, and continuous-duty distributed generation units to manage local generators.
- Emergency Backup Systems: Deployed in hospitals, data centers, and critical infrastructure to ensure rapid, reliable automated start-ups and grid synchronization during power outages.
- Marine Vessel Control: Integrated into the main electrical propulsion and service distribution boards of commercial ships to manage multiple paralleled marine generators.
- Industrial Co-generation: Implemented in paper mills, chemical plants, and refineries that utilize waste heat to generate localized plant power alongside a main utility tie.
Product Usage Instructions
- Hardware Installation: Turn off all chassis power before installation. Align the 1407-CGCM module with the chosen slot guides of the standard 1756 ControlLogix chassis. Push the module firmly into place until the top and bottom latches click securely into the backplane.
- Terminal Block Assembly: Connect the three-phase generator voltage sensing wires and Current Transformer (CT) loops directly to the designated removable terminal block (RTB). Ensure the CT wiring is properly shorted or terminated before powering up to prevent high-voltage hazards.
- Software Configuration: Open Studio 5000 Logix Designer and add the 1407-CGCM module profile to your system I/O configuration tree. Use the configuration interface to set generator nameplate ratings, voltage regulation loops, PID gains, and protective trip limits.
- Synchronization & Tuning: Prior to live commissioning, execute initial testing with the generator prime mover disconnected from the grid. Verify that the automatic synchronizer correctly matches voltage, frequency, and phase angle before attempting an automated breaker closure.
Frequently Asked Questions (Q&A)
- Q: Does the 1407-CGCM include an integrated Automatic Voltage Regulator (AVR)? A: Yes, the module features built-in digital excitation control which operates as an Automatic Voltage Regulator. It continuously measures generator terminal voltage and adjusts its PWM output to maintain stable voltage across varying load demands.
- Q: What protective features are built into this specific control module? A: The 1407-CGCM provides an array of utility and generator protection functions, including overvoltage (59), undervoltage (27), overfrequency (81O), underfrequency (81U), reverse power (32), overexcitation (24), and loss of excitation (40).
- Q: Can this module operate as a standalone unit outside of a ControlLogix chassis? A: No, the 1407-CGCM is designed strictly as a rack-mounted module. It relies directly on the 1756 backplane infrastructure for its logic power, operational processing, and high-speed data exchanges with the primary ControlLogix CPU.
- Q: Is it possible to control multiple generators using a single 1407-CGCM module? A: No, each 1407-CGCM module is dedicated to the monitoring, excitation regulation, and synchronization management of one single synchronous generator unit. For multi-generator paralleled systems, you must install an individual module for each generator in the rack.
