GE DS200TCTSG1AFE Simplex Trip Board

الوصف

The GE DS200TCTSG1AFE Simplex Trip Board is a crucial component within the General Electric Speedtronic Mark V Gas/Steam Turbine Control System.

Its primary function is to serve as the hardware interface that executes safe turbine shutdowns (trips) by physically controlling the trip relays and solenoid valves.

⚙️ Key Function and Role

The board’s part number, DS200TCTSG1AFE, contains key information:

• DS200: Identifies it as a circuit board within the GE Mark V (or often Mark IV/V hybrid) control system series.
• TCTS: Stands for Turbine Control Trip Simplex. This signifies its role as a trip module for systems configured for Simplex operation (single channel protection), or the trip logic portion of a larger Triple Modular Redundant (TMR) system.
• G1: Denotes the Group 1 hardware configuration.
• AFE: These are the revision codes. The multiple letters indicate several design updates or modifications over the original G1 board, suggesting enhanced performance, feature changes, or greater hardware compatibility.

Core Function: Turbine Protection

The Simplex Trip Board is the last line of defense in the control system. It performs a critical safety function:

1. Receive Trip Signal: It receives a “trip” command from the main control processors (R, S, and T) when a severe fault condition is detected (e.g., overspeed, low lube oil pressure, high vibration, or an emergency stop).
2. Actuate Relays: The board is populated with multiple plug-in trip relays (often 21 or more). Upon receiving the trip command, it instantly de-energizes the required relays.
3. Execute Shutdown: The relays’ contacts are wired to the trip solenoid valves for the turbine’s fuel/steam stop valves. When the relays de-energize, they cut the power to these solenoids, causing the main stop valves to slam shut and the turbine to coast safely to a stop.

This conversion from a digital signal (from the control processor) to a physical action (cutting power to a solenoid) is its core protective role.

💡 Technical Features and Revisions (AFE)

The specific revision suffix AFE suggests this is a highly evolved version of the original Simplex Trip Card. While specific changes between every revision are proprietary, the pattern indicates:

• Enhanced Reliability: Later revisions typically feature component upgrades for better noise immunity and longevity, often involving passive components like capacitors and resistors.
• Plug-in Relays: Like most GE trip boards, it utilizes plug-in relays which simplifies maintenance, allowing technicians to quickly replace a faulty relay without needing to replace the entire board assembly.
• Diagnostic Signals: The board contains circuitry to communicate its status back to the main control processors, aiding in diagnostics and identifying the cause of a trip.
• Terminal Connections: It is a large Printed Circuit Board (PCB) that connects to other system components using multiple multi-pin connectors (often 50-pin ribbon cables and smaller 12-pin connectors) for power, trip signals, and control logic.