DS200TCEBG1AAB - Protective Termination Expander Board

SPECIFICATIONS:

Part Number: DS200TCEBG1AAB
Manufacturer: General Electric
Series: Mark V LM
Product Type: Protective Termination Expander Board
Location: Core
Power Handling: 335 V DC
Power Inputs: JWX / JWY / JWZ 335 V DC
Signal Conditioning: 335 V DC
Operating Temperature: 0°C to 60°C
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6421I

FUNCTIONAL DESCRIPTION:

DS200TCEBG1AAB is a Turbine Emergency Trip DIN Rail Module manufactured and designed by General Electric as part of the Mark V LM Series used in GE Speedtronic Gas Turbine Control Systems. The Protective Termination Expander Board (TCEB), installed in the core, plays a key role in conditioning and distributing critical signals for the turbine control system. It scales the potential transformer (PT) and current transformer (CT) signals that are later used by the TCCB board in the core for monitoring generator and bus voltages, as well as line current. These PT and CT signals originate from the PTBA terminal board. In addition to voltage and current inputs, the TCEB board also handles signals related to emergency overspeed protection and flame detection. These signals are received from the PTBA board and routed through the TCEB to the TCEA boards, where they are further processed.

The TCEB board also facilitates the distribution of the 335 V DC power required by flame detector devices. This power, supplied by the TCEA boards, passes through the TCEB for conditioning before being delivered to the PTBA terminal board and then out to the sensors in the field.

TCEB CONNECTORS:

• JKX/Y/Z – Transmits emergency overspeed magnetic pickup and flame detection signals to the TCEA boards located in cores , , and , respectively.
• JMP – Delivers PT and CT signals to the TCCB board in the core.
• JU – Transfers magnetic pickup and flame detection signals from the PTBA terminal board to the TCEB board.
• JV - Carries PT and CT signals from the PTBA terminal board to the TCEB board.
• JVA – Supplies 335 V DC from the TCEB to the PTBA terminal board for UV flame detector devices.
• JWX/Y/Z – Routes 335 V DC from the TCEA boards, conditions it through the TCEB board, and sends it to the PTBA terminal board via the JVA connector.

CONFIGURATION:

The TCEB receives analog signals, such as voltage and current inputs (PT/CT), and digital signals, including magnetic pickup and flame detection, from the PTBA terminal board. These signals are brought into the TCEB via the JU (magnetic pickup and flame detection) and JV (PT/CT) connectors. Once received, the PT and CT signals are scaled within the TCEB and sent to the TCCB board in the core through the JMP connector for monitoring and control purposes.

The flame detection and overspeed protection signals are forwarded to the TCEA boards located in cores , , and using the JKX, JKY, and JKZ connectors. These connections ensure proper signal segregation and timely processing by each respective control core. The system also includes a high-voltage power distribution path to support UV flame detectors. The required 335 V DC power is supplied from the TCEA boards to the TCEB through JWX, JWY, and JWZ, where it is conditioned before being routed through the JVA connector to the PTBA terminal board and finally out to the field detectors.

TCEB PT and CT CIRCUIT:

The PT and CT signals are read via the JV connector from the PTBA terminal board. These signals are stepped down and written to the TCCB board in the core via the JMP connector, where they are used for embedded functions. Any configuration associated with these signals is done in the core.

TCEB EMERGENCY OVERSPEED CIRCUIT:

The magnetic pickup signals for emergency overspeed are read from the PTBA board via the JU connector and passed through the TCEB board to the TCEA boards via the JKX, JKY, and JKZ connectors.

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FREQUENTLY ASKED QUESTIONS:

What types of signals are processed by the TCEB?

The TCEB processes analog signals from PT and CT for voltage and current measurements and digital signals for flame detection and overspeed protection.

How does the TCEB power flame detectors?

It receives 335 V DC from the TCEA boards, conditions the voltage, and sends it to the PTBA terminal board to power UV flame detectors.

What are the main connectors on the TCEB and their functions?

The JU and JV connectors bring signals from the PTBA board, while JKX, JKY, and JKZ send signals to the TCEA boards. JMP routes PT and CT signals to the TCCB board.

How does the TCEB improve system reliability?

The TCEB ensures accurate scaling and routing of critical signals, isolates power for flame detectors, and prevents system failures due to voltage fluctuations or incorrect signal readings.