GE DS2020DACAG2

1. Overview

2. Key Specifications

3. Product Features

• Professional AC/DC Power Conversion: Converts AC input voltage to stable DC output voltage, providing continuous and reliable power support for industrial control systems.
• High Industrial Reliability: Adopts industrial-grade components and professional industrial design, enabling stable operation in harsh and complex industrial environments.
• Mesh Metal Housing Design: Equipped with a mesh metal housing, which is different from the solid housing of the DS2020DACAG1 model. The G2 version features longer service life and higher operational reliability than the G1 model.
• Modular Structure: Standard modular design simplifies on-site installation, disassembly and daily maintenance, reducing operational and maintenance costs.
• Strong Compatibility & Backward Compatibility: Fully compatible with GE Speedtronic Mark V series systems, and can directly replace the DS2020DACAG1 model for equipment upgrade and replacement.
• Parallel Operation Capability: There is little performance difference between DS2020DACAG2 and DS2020DACAG1. Multiple modules can be used in parallel to increase the total output current of the power supply system.
• Power Backup Function: Provides temporary backup power when the main power supply fails, effectively ensuring the continuous and stable operation of the turbine control system.
• DC Bus Power Supply: Supports DC bus power output and supplies stable power for other functional modules in the control system.
• No Self-Diagnosis Function: This module is not equipped with a built-in self-diagnosis program and cannot automatically monitor and track input and output power levels.

4. Structure & Composition

• Transformer: The core component responsible for completing AC/DC power conversion and voltage regulation.
• Power Board: Integrated with complete power circuits and control components. For detailed parameters and instructions, refer to Chapter 3 (starting from Section 3-9) of the GEH-6632 manual.
• DACA Module: Belongs to the Group 2 product series of DACA functional components, realizing core power control functions.
• LED Indicator Light: Installed at the output end of the DACA module to intuitively display the real-time operating status of the power supply.
• Metal Protective Housing: Adopts mesh metal structure, which provides excellent electromagnetic shielding performance and physical protection, while ensuring good heat dissipation.

Reference Manuals

• GEH-6632: EX2100 Excitation Control User Guide (Chapter 3 covers printed circuit board overview; Section 3-9 for power board details, Section 3-10 for DACA module specifications)
• GEH-6721L: PDM Power Distribution Module System Guide

5. Application Fields

• Steam Turbine Control System: Core power supply component for GE Speedtronic Mark V steam turbine control systems, providing stable DC power for system operation.
• Gas Turbine Control System: Used for power supply support of gas turbine operation monitoring and regulation systems to ensure precise equipment control.
• Industrial Automation: Serves as a standard AC/DC power conversion module for various industrial automation control equipment.
• Power Industry: Applied to power system power conversion and power distribution control scenarios.
• Petrochemical Industry: Provides stable power supply for precision control systems of petrochemical production equipment.
• Marine Industry: Suitable for power conversion and power supply support of marine control systems.
• Excitation Control System: Compatible with EX2100 excitation control system, providing higher power output for Exciter Power Distribution Module (EPDM).

6. Installation, Maintenance & Replacement Guidelines

6.1 Installation Precautions

• Power Connection Standard: When connecting two DACA modules, all modules must be connected to the same AC power source to ensure consistent input voltage.
• Parallel Installation Requirements: If two DS2020DACAG2 units are installed in parallel, they must share a single unified AC power input source.
• Ground Voltage Specification: Under the condition of diode coupling and midpoint grounding, the standard ground voltage is ±62.5V.
• Operating Temperature: It is recommended to operate the module in an environment with a temperature below 149°F (approximately 65°C).
• Manual Reference: Read and follow the GEH-6632 EX2100 User Guide and GEH-6721L PDM System Guide in full before installation and commissioning.

6.2 Maintenance Key Points

• Regular Replacement Cycle: For modules operating at a continuous temperature of 149°F, a replacement cycle of every 5 years is recommended to ensure system stability.
• Real-time Status Monitoring: Check the LED indicator light regularly to judge the real-time operating status of the power module.
• Manual Fault Inspection: Since the module has no self-diagnosis function, regular manual inspection of input and output power levels is required to eliminate potential faults.
• Daily Cleaning & Heat Dissipation Maintenance: Keep the mesh housing clean and unobstructed, remove accumulated dust regularly to avoid heat dissipation failure and performance attenuation.

6.3 Replacement Recommendations

• The DS2020DACAG2 features complete backward compatibility and can be used as a direct replacement for the DS2020DACAG1 module.
• The upgraded G2 version has significant advantages over the G1 model in terms of service life and operational reliability, making it the preferred replacement model for equipment upgrading and maintenance.