DS200TCDAP1B - Emergency Overspeed Board

SPECIFICATIONS:

Part Number: DS200TCDAP1B
Manufacturer: General Electric
Series: EX2000
Product Type: Emergency Overspeed Board
Power Requirements: +5 V dc, 6 A
Number of relay channels: 12
Power supply voltage: 28 V dc
Mounting: DIN-rail mounting
Technology: Surface mount
Operating temperature: -30 to +65°C
Size: 15.9 cm high x 17.8 cm
Repair: 3-7 Day
Availability: In Stock
Country of Origin: United States
Manual: GEI-100182B

FUNCTIONAL DESCRIPTION:

DS200TCDAP1B is an Emergency Overspeed Board manufactured and designed by General Electric as part of the EX2000 Series used in GE Excitation Control Systems. It’s located within the digital I/O cores Q11, Q51, and Q21, where applicable. TCDA is responsible for handling digital contact input signals from the DTBA and DTBB terminal boards, as well as managing contact output signals, including relay and solenoid signals, originating from the two TCRA boards. These signals are transmitted via the IONET to reach the TCQC board located in R1 and R2 if Q21 is installed and to the CTBA terminal board within R5. The primary purpose of such a board is to protect the turbine and surrounding equipment from catastrophic failure by limiting the speed in case of a sudden malfunction or dangerous condition.

These boards typically monitor various parameters, such as rotational speed, and are programmed to intervene and control the turbine's operation if it approaches or exceeds a pre-determined overspeed limit. This safety feature can help prevent damage to the turbine, ensure safe operation, and protect the overall integrity of the system. The specifics of how an Emergency Overspeed Board operates can vary depending on the design of the turbine control system and the manufacturer's specifications.

Overspeed Detection: The board continuously monitors the rotational speed of the turbine and can quickly detect any significant increase in speed.

Setpoint Configuration: Users can configure the desired overspeed setpoint at which the board should intervene. This setpoint is usually determined based on the turbine's design and safety requirements.

Rapid Response: The board is designed to respond rapidly to any overspeed condition, ensuring that corrective actions are taken as quickly as possible to prevent damage or catastrophic failure.

Shutdown Capability: In the event of an overspeed condition, the board can initiate an emergency shutdown of the turbine to bring it to a safe operating speed or a complete stop.

Redundancy: Many systems incorporate redundancy to ensure the reliability of the overspeed protection. This may involve duplicate sensors, processors, or control channels.

TCDA CONNECTORS:

JP: Distributes power from the TCPS board in the R1, R2, and R5 cores to the Q11, Q21, and Q51 cores, respectively.
JQ: Connects to the JQR socket on the DTBA board, transmitting contact input signals from the DTBA board to the TCDA board.
JR: Connects to the JRR socket on the DTBB board, conveying contact input signals from the DTBB board to the TCDA board.
JO1: Transmits contact output (relay/solenoid) signals to the TCRA board in location four. Not utilized in Q11, as the relays in location 4 are directly controlled by TCQE in R1.
JO2: Transmits contact output (relay/solenoid) signals to the TCRA board in location five.
JX1: This is a shielded twisted pair cable for IONET signals. The TCDA board in the Q11 core sends signals to the JX2 connection on the TCEA board in location five of the P1 core.
JX2: Used for the same function as JX1. Either JX1 or JX2 can be employed for this purpose.

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FREQUENTLY ASKED QUESTIONS:

What is an Emergency Overspeed Board?

An Emergency Overspeed Board is a critical safety component in a turbine control system designed to monitor and respond to overspeed conditions in order to prevent catastrophic damage and ensure safe operation.

Why is overspeed protection important for turbines?

Overspeed conditions in turbines can lead to mechanical failure, which can be dangerous and expensive to repair. Ensuring the turbine operates within safe speed limits is crucial for safety and equipment integrity.

How does the Emergency Overspeed Board work?

It continuously monitors the turbine's rotational speed and activates safety measures, such as shutdown, alarms, and notifications, when the turbine approaches or exceeds the predetermined overspeed setpoint.