DS215TCEAG1B - Emergency Overspeed Board

SPECIFICATIONS:

Part Number: DS215TCEAG1B
Manufacturer: General Electric
Series: Mark V LM
Product Type: Emergency Overspeed Board
Availability: In Stock,
Weight:1.00 lbs
Dimensions:6.00 x 5.00 x 1.00
Country of Origin: United States
Manual: GEH-6153

FUNCTIONAL DESCRIPTION:

DS215TCEAG1B is an Emergency Overspeed Board manufactured and designed by General Electric as part of the Mark V LM Series used in GE Speedtronic Gas Turbine Control Systems. The Emergency Overspeed Board (TCEA), located in the Protective Core, provides high-speed protective circuitry and is also known as the Protective Processor. The three TCEA boards utilized in the core are called the X, Y, and Z processors. These boards provide signals for shaft speed control, flame detection, and automatic synchronization. The signals are scaled and conditioned before being written via the IONET to the STCA board in the core via the JX1 connector on the TCEA board (location one).

The TCEA boards in locations three () and five () use the JX1 and JX2 connectors to transport information. The core's I/O Engine selects the median value from three TCEA boards and transfers the results to the Control Engine via COREBUS. The TCEA boards provide emergency trip signals to the Turbine Trip Board (TCTG), with each TCEA board sending a trip signal to a different relay. The three relays on the TCTG board vote 2/3 (relay driver level voting), and the outcome determines whether the TCTG board trips the unit. Each TCEA board includes its power supply and diagnostics.

TCEA CONNECTORS:

JK - Carries the signals to the TCEA board from the TCEB board in location two of the core. JK connects to either JKX, JKY, or JKZ connectors on the TCEB board. This board is the Protection Termination Expander Board on which all of the signals are brought in and transferred 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) in location four of the core. Each TCEA board connects to a different connection on the TCTG board. JL on connects to JLX, JL on connects to JLY, and JL on connects to JLZ.

JW - Carries the 335 V dc 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 - Daisy chained IONET connectors. JX1 on connects to the JX connector on the TCQC board in the core. This IONET connection reads/writes all of the core signals and digital I/O, , core signals to the I/O Engine in .

JX1 - connects to the JX2 socket on allowing it to be on the daisy chain. The JX1 connector on connects to the JX2 socket on . Again this allows it to be on the daisy chain. All of the signals are carried from board to board over the daisy chain until they arrive at the TCQC board in the core.

JX2 - Daisy chained IONET connectors. JX2 on connects to the JX1 connector on . JX2 on connects to the JX1 connector on . The JX2 connector on connects to the TCDA board in the core. This allows the digital signals to follow the daisy chain up the IONET to the core.

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FREQUENTLY ASKED QUESTIONS:

What is an emergency overspeed board in a turbine control system?

An emergency overspeed board in a turbine control system is a safety device designed to prevent the turbine from exceeding its maximum safe rotational speed, which could lead to catastrophic failure.

How does an emergency overspeed board function in a turbine control system?

The emergency overspeed board monitors the rotational speed of the turbine. If the speed surpasses a preset threshold, indicating an overspeed condition, the board triggers safety mechanisms to shut down the turbine and prevent damage.

Why is an emergency overspeed board necessary in turbine control systems?

Turbines operate within specific speed limits to ensure safe and efficient performance. The emergency overspeed board serves as a critical safeguard against potentially hazardous overspeed situations that could result in equipment damage or even endanger personnel.