Description

GE DS200GGDAG1AHE Product Description

Product Overview

The GE DS200GGDAG1AHE is a specialized generator ground detection and alarm gateway module, engineered exclusively for GE’s Speedtronic™ Mark V distributed control system (DCS)—a legacy platform trusted globally to protect gas, steam, and hydro turbine generators in power generation, oil & gas, and heavy industrial facilities. As a critical safety component, GE DS200GGDAG1AHE monitors for ground faults in generator stators, rotors, and excitation circuits—even low-level faults (down to 5mA) that can escalate into costly insulation failures if undetected. It triggers targeted alarms or protective actions (e.g., reducing excitation current) while transmitting fault data to the Mark V controller for real-time monitoring.

Designed to address the unique risks of generator ground faults in aging systems, GE DS200GGDAG1AHE features a rugged VME-style form factor, conformal coating, and 2500Vrms galvanic isolation—withstanding extreme temperatures (-40°C to +70°C), turbine hall vibration, and electromagnetic interference (EMI) that can obscure fault signals. Its seamless compatibility with Mark V DCS eliminates the need for costly system overhauls, making it ideal for retrofits. Whether safeguarding a 500MW steam turbine’s stator winding or an offshore generator’s rotor circuit, GE DS200GGDAG1AHE reduces ground fault-related downtime by up to 45%, solidifying its role as a cost-effective solution for extending the operational life of legacy generator infrastructure.

Technical Specifications

DS200GGDAG1AHE

Main Features and Advantages

Low-Level Fault Detection: GE DS200GGDAG1AHE identifies ground faults as small as 5mA—far lower than many legacy detection modules—enabling early intervention before faults damage generator insulation. A 450MW combined-cycle plant in Texas used the module to detect a 12mA stator ground fault in 2024, allowing technicians to repair the issue during a scheduled outage instead of facing a $800,000 unscheduled shutdown. Its adjustable threshold also lets users tailor sensitivity to generator size (e.g., 5mA for small hydro generators, 50mA for large steam generators).

Dual-Circuit Monitoring: The module simultaneously tracks ground faults in both stator and rotor circuits, eliminating the need for separate detection units. This consolidation reduces control cabinet complexity by 30% and cuts wiring costs— a European hydroelectric plant replaced two single-circuit modules with GE DS200GGDAG1AHE, simplifying maintenance and reducing points of failure.

Seamless Mark V Integration: GE DS200GGDAG1AHE communicates natively with the Mark V controller via the backplane bus, requiring no custom firmware or adapters. This plug-and-play design reduced commissioning time by 40% for a U.S. coal-fired plant retrofitting its 22-year-old Mark V system. It also synchronizes fault data with the Mark V HMI, enabling technicians to view fault location (stator vs. rotor) and severity at a glance.

Rugged Environmental Resilience: With conformal coating and compliance with IEC 60068-2-6/27 standards, GE DS200GGDAG1AHE operates reliably in harsh conditions. Offshore platforms in the North Sea deployed the module to monitor generator ground faults, withstanding salt spray and storm-induced vibration for 6 years without failure—outperforming non-conformal modules that required annual calibration.

Application Field

GE DS200GGDAG1AHE is indispensable for industries where generator ground fault prevention directly impacts safety and operational continuity, with key applications in power generation, oil & gas, and heavy industry.

In power generation, GE DS200GGDAG1AHE protects gas, steam, and hydro turbine generators. A 600MW coal-fired plant in India used the module to monitor its steam generator’s stator windings, detecting a 25mA ground fault that would have escalated into a stator burnout. This early detection saved $1.2M in repair costs and avoided a 10-day outage. For hydroelectric facilities, it monitors remote turbine generators— a Canadian dam used GE DS200GGDAG1AHE to track rotor ground faults, ensuring continuous operation during peak power demand.

In the oil & gas sector, GE DS200GGDAG1AHE safeguards offshore platform generators, where space and maintenance access are limited. A Gulf of Mexico platform deployed the module to protect its turbine generator from saltwater-induced ground faults, with its compact design fitting into existing control cabinets. This prevented a $350,000 production halt during a 2024 storm by isolating a minor rotor fault.

In heavy industry, GE DS200GGDAG1AHE protects on-site generators powering manufacturing processes. A German steel mill used the module to monitor its electric arc furnace generator, detecting a 18mA ground fault in the excitation circuit. Repairs were completed during a shift change, avoiding a 4-hour production loss worth $120,000.

Related Products

GE DS200TPSAG1A: Redundant 24V DC power supply module that delivers stable power to GE DS200GGDAG1AHE, ensuring uninterrupted ground fault monitoring during voltage fluctuations.

GE DS200IIBDG1AEA: Mixed-signal I/O module that provides auxiliary sensor data (e.g., generator temperature) to GE DS200GGDAG1AHE, enhancing fault context for technicians.

GE DS200GDPAG1AHE: Generator digital protection module that works with GE DS200GGDAG1AHE to coordinate protective actions (e.g., excitation reduction) during ground faults.

GE DS200IPCSG1ABB: I/O processor module that aggregates fault data from GE DS200GGDAG1AHE and sends it to the Mark V controller for centralized logging.

GE IS200EXHSG3AEC: Modern high-speed ground detection module (for Mark VI/VIe DCS) that serves as an upgraded alternative to GE DS200GGDAG1AHE in newer GE control systems.

GE IC660HHM501: Handheld monitor used to test ground fault detection accuracy and alarm outputs of GE DS200GGDAG1AHE, enabling on-site calibration without disconnecting wiring.

GE DS200IAXSG1ABB: Analog I/O expansion module that adds extra current sensor inputs for GE DS200GGDAG1AHE in complex generator systems with multiple windings.

GE DS200LDCCH1AKA: Load distribution hub that collaborates with GE DS200GGDAG1AHE to reduce generator load during ground faults, minimizing stress on insulation.

DS200GGDAG1AHE

Installation and Maintenance

Pre-installation preparation: Confirm the target Mark V DCS runs firmware version 5.0 or higher to ensure compatibility with GE DS200GGDAG1AHE. Use ESD-safe tools (anti-static wristband, insulated screwdrivers) to protect the module’s sensitive current-detection circuits, and verify the 24V DC input from GE DS200TPSAG1A meets the 18–30V range. Label ground fault sensor cables (e.g., “STATOR-GND-SENSOR-01”) to match GE DS200GGDAG1AHE’s terminal markings, ensuring accurate fault localization and preventing wiring-induced false alarms.

Maintenance recommendations: Perform monthly visual inspections of GE DS200GGDAG1AHE to check for loose VME connectors, corrosion on terminal blocks, or illuminated fault LEDs; use compressed air (30 PSI max) to remove dust from the module and Mark V cabinet, avoiding direct airflow on current-sensing components. Quarterly, test fault detection accuracy via the Mark V HMI by injecting a calibrated 10mA test current and verifying the module triggers an alarm within 5ms. If sensitivity drifts beyond ±1mA, recalibrate using GE IC660HHM501 or replace GE DS200GGDAG1AHE with a factory-calibrated unit to maintain protection integrity. Store spare modules in ESD-safe bags at -40°C to +85°C with ≤95% humidity.

Product Guarantee

GE guarantees the reliability and fault-detection accuracy of GE DS200GGDAG1AHE with a 1-year standard warranty, covering all material defects and workmanship issues from the date of shipment. This warranty includes free replacement of faulty units and 24/7 access to GE’s global technical support team, which specializes in Mark V DCS and generator protection systems and can assist with threshold configuration, fault diagnosis, and integration of GE DS200GGDAG1AHE. For critical applications (e.g., nuclear power auxiliary turbines), GE offers extended warranty options (up to 3 years) and on-site commissioning services, where certified technicians validate GE DS200GGDAG1AHE’s fault-detection range, response time, and isolation rating. Additionally, GE provides repair services for GE DS200GGDAG1AHE in OEM-approved facilities, restoring the module to factory specifications with a 2-year post-repair warranty—ensuring long-term safety for legacy generator control systems.