GE DS200TCEBG1ACD Protective Termination Expander Board

الوصف

The GE DS200TCEBG1ACD Protective Termination Expander Board is a specific printed circuit board (PCB) used in the General Electric Speedtronic Mark V Turbine Control System.¹

This board’s primary function is to serve as a high-reliability signal conditioning and routing interface within the protective core of the turbine control panel.²

🛠️ Board Function and Location

The TCEB (Termination Common Expander Board) is located in the P1 core slot of the Mark V panel and performs critical signal processing before data is passed to the main control and protection processors.³

• Signal Scaling and Conditioning: The board scales and conditions the high-level signals from the Potential Transformers (PTs) and Current Transformers (CTs) for use in calculating generator and bus voltages and line current.⁴ These scaled signals are then sent to the TCCB (Turbine Control Core Board).⁵

   

• Protection Signal Interface: It manages signals for essential protective functions:⁶

   

  • It reads and sends emergency overspeed signals (from magnetic pickups) from the PTBA (Protection Terminal Board Assembly) to the TCEA (Emergency Overspeed Boards).
  • It handles flame detection signals.
• Auxiliary Power: It conditions and routes the $\text{335 V DC}$ power required for the UV flame detector devices to the PTBA terminal board.
• Alarm Horn: The board typically contains the audible alarm horn for the Mark V LM system, though the jumper to enable/disable the horn is usually located on the PTBA board.⁷

   

🔢 Understanding the Part Number (DS200TCEBG1ACD)

The alphanumeric string specifies the board’s type, group, and revision level:

The revision level (ACD) is important for replacement purposes. Boards with a higher revision code are generally backward-compatible (they can replace an older revision), but an older revision generally cannot replace a newer one due to potential component changes or design updates.