GE DS2020DACAG2 OBS:Power Module, AC TO DC, 125VDC

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Based on the user’s request and my expert knowledge of industrial automation, here is a detailed and high-quality description of the GE DS2020DACAG2 power module.

1. Enhanced SEO Titles

1. GE DS2020DACAG2: AC to DC Power Conversion Module for EX2100 & Mark V.
2. GE DS2020DACAG2: The Critical 115 VAC to 125 VDC Power Supply.
3. DS2020DACAG2 GE Board: Powering Excitation Controllers with a Stable DC Bus.
4. GE EX2100 DS2020DACAG2: High-Reliability Power Module.
5. DS2020DACAG2: The Backbone for GE Generator Excitation Systems.

2. Brief Product Description

The GE DS2020DACAG2 is an AC to DC Power Conversion Module designed specifically for the GE EX2100 Excitation Controller series and other related systems like the Mark V. Its primary function is to convert an incoming Alternating Current (AC) power source, typically 115 VAC, into a stable Direct Current (DC) power source of 125 VDC. This board is a critical component for powering the various modules and circuits within the excitation controller cabinet, which in turn manages the generator’s excitation. It is an improved version of the previous DS2020DACAG1 model, offering enhanced reliability and the ability to operate in parallel with other power modules.

• Part Type: AC to DC Power Module
• Primary Function: To convert 115 VAC to 125 VDC for the control system.
• Compatibility: GE EX2100 Excitation Control Systems and Mark V.
• Application: Generator excitation control and power generation.

3. Detailed Product Description

In the world of power generation, a stable and reliable power source is non-negotiable for control systems. The GE DS2020DACAG2 is engineered for exactly this purpose. From an automation expert’s perspective, this is a sophisticated power supply module that is a cornerstone of the system’s electrical architecture. It is more than just a converter; it is an active component in the power distribution model, capable of working in concert with other power sources to ensure uninterrupted operation.

A Closer Look at the DS2020DACAG2

The DS2020DACAG2 is a specialized assembly used in the EX2100 excitation control system. Its functional acronym is DACA (Digital-to-Analog Converter Assembly), although its primary role in this context is power conversion. The module’s design is optimized for high-reliability applications and includes the following key features:

• AC to DC Conversion: The core function is to take a nominal 115 VAC input and, using a full-wave bridge rectifier and an output filter capacitor, convert it into a stable 125 VDC output. This is crucial as most of the internal control modules operate on DC power.
• DC Bus Creation: The 125 VDC output from the DACA module is then coupled with other DC power sources in the controller via a diode to create a centralized DC bus. This bus then feeds power to all the connected controller modules and gate pulse amplifier boards.
• Redundancy and “Ride-Through”: The DACA module can be used as a primary power source and can also be complemented by a battery source to provide a redundant 125 VDC supply for the system’s Power Distribution Module (EPDM). This redundancy is a vital safety and reliability feature. Furthermore, the module’s energy storage capabilities provide “ride-through” time during a momentary loss of control power, allowing the system to continue operating without interruption.
• Parallel Operation: A key improvement of the DS2020DACAG2 over its predecessor is its enhanced ability to be paralleled with other DACA boards, allowing for a higher current output and increased redundancy. This makes the system more robust and scalable.
• Onboard Indicators: The module features LED indicators that provide a quick visual check on the power supply to the connected outputs, such as the EPDM, EGPA, EXTV, and EPBP.

It’s important to note that while the user has labeled this part as “OBS” (obsolete), it is the direct replacement for the DACAG1 and is still in wide use, although newer generations of GE equipment have since been released. The longevity and reliability of this model mean it remains a crucial part of many existing control systems.

Key Features and Benefits

• High-Reliability Power Supply: Provides a consistent and stable 125 VDC output, which is crucial for the dependable operation of the control system.
• Built-in Redundancy: Can be used in conjunction with a battery backup to create a redundant power source, minimizing downtime.
• Enhanced Parallel Capability: The G2 revision is designed for seamless parallel operation with other DACA boards, providing increased current capacity and redundancy.
• “Ride-Through” Capability: Provides local energy storage to extend operation during brief power interruptions.
• Clear Diagnostics: Onboard LED indicators offer a simple way to confirm the presence of power to downstream modules.
• Robust Industrial Design: Engineered to function reliably in the harsh, demanding environments of power plants.

Technical Specifications