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ABB SDCS-FEX-4 Exciter Module 

1. Key Parameters

• Product Model: SDCS-FEX-4
• Product Series: ABB SDCS-Series Industrial Small-Medium Generator Excitation Modules (Field Current Control)
• Core Function: Field current adjustment; terminal voltage stabilization; reactive power balancing; grid synchronization assistance; compatible with ABB SDCS low-power excitation systems.

2. Core Features

• Tailored for Small-Medium Generators: 0-500A field current range matches small synchronous generators (≤10MW), optimizing cost and size.
• Stable Voltage Output: ±0.5% steady-state regulation ensures generator voltage meets load and grid requirements, avoiding voltage fluctuations.
• SDCS System Compatibility: Seamlessly integrates with ABB SDCS low-power excitation systems, enabling plug-and-play without complex tuning.
• Basic Fault Protection: Built-in overcurrent and field circuit open-circuit detection, triggering alarms/shutdowns to protect the generator and module.

3. Application Fields

• Industrial Auxiliary Power: Controls excitation for small synchronous generators in factory auxiliary power stations (e.g., workshop lighting, equipment power).
• Small Hydropower Plants: Regulates field current for small hydropower generators (≤5MW) to stabilize output voltage.
• Backup Power Systems: Manages excitation for diesel-synchronous generator sets, ensuring stable power during grid outages.
• Distributed Generation: Supports excitation control for small gas-fired generators in distributed energy systems.

4. Precautions

• Compatibility: Use exclusively with ABB SDCS low-power excitation systems; confirm generator rated power (≤10MW) matches module capacity.
• Installation: Follow ESD protection (anti-static wristband); ensure tight connection of high-current field terminals to avoid overheating.
• Calibration: Verify voltage regulation accuracy annually with a standard voltage meter; avoid long-term operation beyond 110% rated field current.
• Spare Parts: Use genuine ABB SDCS-FEX-4 units—non-genuine modules may cause voltage instability or generator synchronization failures

The structure and details of the product：

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