DS200TCEAG2BTF - Emergency Overspeed Board

SPECIFICATIONS:

Part Number: DS200TCEAG2BTF
Manufacturer: General Electric
Series: Mark V LM
Board rating: 125 V DC
Product Type: Emergency Overspeed Board
Impedance to the ground: 75 Ohms
Overspeed Trip: J28/J29
Connectors: J7, JK, JL, JW, JX1
Redundancy: Dual
Power Requirements: +5 V dc, 6 A
Operating temperature: -30 to +65°C
Size: 30.48cm High x 21.33cm
Mounting: 4 mounting Holes
Repair: 3-7 days
Availability: In Stock
Country of Origin: United States

FUNCTIONAL DESCRIPTION:

DS200TCEAG2BTF is an Emergency Overspeed Board manufactured and designed by General Electric as part of the Mark V LM Series used in GE Speedtronic Control Systems. The Emergency Overspeed Board (TCEA), located in the Protective Core , serves as the high-speed protection circuitry and is commonly referred to as the Protective Processor. Within the core, three TCEA boards, identified as , , and , handle signals for high and low shaft speed, flame detection, and automatic synchronization. These signals are scaled, conditioned, and transmitted over the IONET to the STCA board in the core via the JX1 connector on the TCEA board in location one (). The boards in locations three () and five () transfer data to the board using the JX1 and JX2 connections. The I/O Engine in the core processes data from all three TCEA boards, performs a median select on the values, and sends the results across the COREBUS to the Control Engine. Additionally, each TCEA board sends emergency trip signals to the Turbine Trip Board (TCTG), with each board activating different relays. The TCTG board uses a 2/3 vote system based on relay driver-level voting to determine whether the unit should trip. Each TCEA board operates with its power supply and includes power supply diagnostics.

TCEA CONNECTORS:

• JK – Transmits signals from the TCEB board in location two of the core to the TCEA board. It connects to the JKX, JKY, or JKZ connectors on the TCEB board. The Protection Termination Expander Board (TCEB) is responsible for bringing in all signals and forwarding them to the TCEA boards. connects to JKX, connects to JKY, and connects to JKZ.
• JL – Carries the trip signals to the Turbine Trip Board (TCTG) located in location four of the core. Each TCEA board connects to a distinct connection on the TCTG board. JL on connects to JLX, JL on connects to JLY, and JL on connects to JLZ.
• JW – Delivers 335 V DC power for the flame detectors to the TCEB board. JW connects to the JWX/Y/Z connectors on the TCEB board. connects to JWX, connects to JWY, and connects to JWZ.
• JX1 – A daisy-chained IONET connector. JX1 on links to the JX connector on the TCQC board in the core. This IONET connection handles the reading and writing of all core signals, digital I/O, and core signals to the I/O Engine in . JX1 on connects to JX2 on , and JX1 on connects to JX2 on , continuing the daisy chain until the signals reach the TCQC board in the core.
• JX2 – Another daisy-chained IONET connector. JX2 on connects to JX1 on , JX2 on connects to JX1 on , and JX2 on connects to the TCDA board in the core. This setup ensures the digital signals continue to travel up the IONET daisy chain to the core.

TCEA CONFIGURATION:

Hardware: The TCEA boards feature several hardware jumpers for configuration and testing purposes. Jumpers J1 and J31 are used for factory testing, while J2 and J3 are designated for IONET termination resistors. Jumpers J4, J5, and J6 are responsible for setting the IONET address for each TCEA board. Overspeed trip frequency settings are adjusted using jumpers J12 through J21 for the high-pressure shaft and J8 through J11, as well as J22 through J27, for the low-pressure shaft. The actual configuration of these settings is performed through the I/O configuration software. Additionally, jumpers J28 and J29 cause to always vote for a trip in the event of an emergency overspeed. Jumper J30 enables the stall timer. For detailed information on the hardware jumper settings, refer to Appendix A and the hardware jumper screen on the operator interface.

Software: The IO Configuration Editor is used to set the base speed and overspeed values for both the high and low pressure shafts, as well as calculate the hardware jumper settings for trip frequency. It also allows for the selection of pulse rate information from the Ultra Violet (UV) flame detectors and the configuration of auto-synchronization permissive values.

TCEA AUTOMATIC SYNCHRONIZING CIRCUIT:

The bus and generator voltages from the PTBA terminal board are routed through the JV connector to the TCEB board and then transferred via the JMP connector to the TCEA board. Embedded software in the TCEA's EPROMs handles both speed and voltage matching. After verifying that generator and line voltages and frequencies are within the limits set by the I/O Configuration constants, the TCEA board issues a permissive signal to close the breaker. Additionally, the STCA board performs an independent synchronization check and sends a logic signal to the TCEA board, which must also be valid for breaker closure to occur.

WOC has the largest stock of OEM Replacement Parts for GE Speedtronic Control Systems. We can also repair your faulty boards and supply unused and rebuilt boards backed up with a warranty. Our team of experts is available around the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on parts and repairs, kindly contact our team by phone or email.

FREQUENTLY ASKED QUESTIONS:

What is the Emergency Overspeed Board (TCEA)?

The Emergency Overspeed Board (TCEA) is a vital component in the turbine control system, responsible for monitoring turbine shaft speed and initiating emergency shutdowns if an overspeed condition is detected. It serves as a core part of the turbine’s protective logic.

How do the boards transmit their data?

The boards condition and scale their input signals and send the data over the IONET to the STCA board in the R1 core via the JX1 connector. The Y and Z boards transfer their information using the JX1 and JX2 connectors through the X board.

How does the TCEA board communicate with the system?

Communication between the TCEA boards and the rest of the system occurs via daisy-chained IONET connections through connectors JX1 and JX2. These connections allow the TCEA boards to send and receive critical data to the I/O Engine and Control Engine in the core.