GE DS200EXDEG1A DE-EXCITATION CONTROL

GE DS200EXDEG1A DE-EXCITATION CONTROL

  • Obsolete Status: As a component of the discontinued Mark V series, the DS200EXDEG1A is considered an obsolete part. It is no longer manufactured by GE and is typically sourced from new old stock, surplus vendors, or specialized repair and refurbishment companies.
  • Safety Function: The board is crucial for ensuring the safety of the generator and its components during a shutdown. It limits the voltage across the generator field and the energy dissipated in contactors, which helps prevent equipment damage and fire hazards.
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The GE DS200EXDEG1A is a De-Excitation Control Board for the GE Speedtronic Mark V series of turbine control systems. It is not a modern, standalone PLC module but a specialized circuit board that performs a critical safety function in the control of generators and turbines.

 

Key Features and Function

 

  • De-Excitation Control: The board’s primary function is to manage the de-excitation process of a generator. When a generator is shut down, the energy stored in its magnetic field must be safely dissipated to prevent damage to the equipment and personnel. The DS200EXDEG1A controls this process by providing a controlled discharge path for the field current.
  • Mark V Series: This board is an integral part of the Mark V series, a legacy control system widely used in power generation for controlling gas, steam, and wind turbines.
  • Hardware Components: The board is populated with a variety of components, including capacitors, thyristors, and gate control logic. The capacitors are used to store high-voltage current, which is then released in a controlled manner to facilitate de-excitation. The board is also equipped with connectors and LED indicators for diagnostics.
  • Obsolete Status: As a component of the discontinued Mark V series, the DS200EXDEG1A is considered an obsolete part. It is no longer manufactured by GE and is typically sourced from new old stock, surplus vendors, or specialized repair and refurbishment companies.
  • Safety Function: The board is crucial for ensuring the safety of the generator and its components during a shutdown. It limits the voltage across the generator field and the energy dissipated in contactors, which helps prevent equipment damage and fire hazards.

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