DS200TCTGG2AFF - Turbine Trip Board

SPECIFICATIONS:

Part Number: DS200TCTGG2AFF
Manufacturer: General Electric
Series: Mark V LM
Product Type: Turbine Trip Board
Number of channels: 16
Analog output current: 0-20 mA
Analog output current: 0-20 mA
Operating temperature: -30 to 65 °C
Size: 10.16 cm wide x 33.02 cm
Frequency: 50 or 60 Hz
Repair: 3-7 Day
Availability: In Stock
Weight: 2 lbs
Country of Origin: United States

FUNCTIONAL DESCRIPTION:

DS200TCTGG2AFF is a Turbine Trip Board manufactured and designed by General Electric as part of the Mark V LM Series used in GE Speedtronic Turbine Control Systems. The Turbine Trip Board (TCTG), in location four of the core, is used to operate fuel shutoff valves for the turbine. Two types of trip relays are available on the TCTG board for failsafe fuel valve operation. There are primary trip relays (PTRs) and emergency trip relays (ETRs). Communication faults and the CSP operate the PTRs. The TCEA boards in the core operate the ETRs, which conduct a 2/3 vote for an emergency trip. Hardwire trip pushbuttons will de-energize the 24 V dc supply to both the PTR and ETR relays and initiate a trip. The synchronizing relays are also located on the TCTG board.

TCTG CONFIGURATION:

Hardware: There is one hardware jumper on the TCTG board. J1 is the Emergency Overspeed servo Clamp Enable jumper for servo valves one through four. This jumper is used to apply 24 V DC to the servo outputs. The actual relay is located on the TCQC board. Refer to Appendix A for information on the hardware jumper setting for this board.

TCTG PTR RELAY CIRCUIT :

The trip signals for the PTR relays are driven by the TCQA board based on data generated by the control sequence program (CSP) and are site-specific. The site-specific CSP generates a trip signal that is written to the I/O Engine in the core via the COREBUS. The STCA board in the core then writes the trip signals across the 3PL connector to the TCQA board, which writes the trip signals to the TCTG board in the core via the JD connector. The PTR relays will also perform a two out of three hardware level vote before tripping the unit, even though the same signal was written to all three relays via the core. Once a PTR trip has been initiated, the CSP generates a cross-trip that trips the ETR relays.

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FREQUENTLY ASKED QUESTIONS:

How does the Turbine Trip Board interact with the main control system?

The Turbine Trip Board works in conjunction with the main turbine control system by continuously feeding real-time data. If unsafe conditions are detected, it sends an emergency signal to trip the turbine and alert the control system of the trip status.

What are the consequences of not maintaining the Turbine Trip Board properly?

Poor maintenance can lead to inaccurate readings, delayed trip responses, and potentially catastrophic turbine damage due to undetected faults. Regular checks ensure the system's reliability and safety.

What types of trip relays are on the TCTG board?

The board contains Primary Trip Relays (PTRs) for standard shutdown operations and Emergency Trip Relays (ETRs) for critical trip events. Both relay types are essential for fuel shutoff and turbine safety.