DS200TCTGG1A

DS200TCTGG1A is a Turbine Trip Board (TCTG) developed by GE. It controls the fuel shutoff halves for the turbine and is located in position 4 of the core. On the TCTG board, there are two different trip relay types available for failsafe fuel valve functioning. Primary trip relays (PTRs) and emergency trip relays are both available (ETRs). The PTRs are controlled by the CSP and communication errors. The ETRs are managed by the TCEA boards in the core, and an emergency trip requires a 2/3 vote. Pushbuttons for hardwiring trips will turn off the 24 V dc power to the PTR and ETR relays and start a trip. The TCTG board also houses the synchronizing relays.

DS200TCTGG1A Configuration

Hardware On the TCTG board, there is only one hardware jumper. The Emergency Overspeed servo Clamp is J1. Activate the jumper to open servo valves 1-4. Applying 24 V dc to the servo outputs requires the usage of this jumper. On the TCQC board is where the actual relay is situated.
Software The TCTG board is not configured with any software.

DS200TCTGG1A Connectors

• J7W - The TCPD board's 125 V dc power is distributed throughout the core by J7W.
• JDR - JDR relays K10, 13, 16, and 19 after reading the PTR trip signals from the TCQA board in the core. reads synchronization orders from the core's TCQA board. reads the PTBA board's bus and generator signals. On the TCTG board, JDR, JDS, and JDT are all daisy-chained together.
• JDS - Relays K11, 14, 17, and 20 and reads the PTR trip signals from the TCQA board in the core.
reads synchronization orders from the core's TCQA board. reads the PTBA board's bus and generator signals. On the TCTG board, JDR, JDS, and JDT are all daisy-chained together.
• JDT - Relays K12, 15, 18, and 21 when reading the PTR trip signals from the TCQA board in the core. reads synchronization orders from the core's TCQA board. reads the PTBA board's bus and generator signals. On the TCTG board, JDR, JDS, and JDT are all daisy-chained together.
• JLX - Reads the core-based ETR trip signals. JLX connector feeds K5 and K8 of the ETR relays. the 24 V dc protected bus with energy.
• JLY - Reads the core's ETR trip signals using JLY. The JLY connector provides power to the ETR relays K4 and K7. the 24 V dc protected bus with energy.
• JLZ - Reads the ETR trip signals from the P1 core's Z through JLZ. JLZ connector feeds K6 and K9 of the ETR relays. the 24 V dc protected bus with energy.
• JN - Reads and writes signals to the P1 core's PTBA terminal board. The breaker close signal, hardwire trip signals, and the alarm horn signal are some examples of these signals.
• JM - Reads and writes signals to the P1 core's PTBA terminal board. The emergency trip signal and the breaker close signal are examples of these signals.
• JT - Not commonly used.

ETR Relay

The trip signals for the ETR relays are produced by the TCEA boards X, Y, and Z in the P1 core. The signals are written to the TCTG board through the JLX/Y/Z connections. To decide whether the unit should be tripped, the ETR relays conduct a hardware level two-out-of-three vote. By opening and closing a string of associated contacts on the TCTG board, the device trips if two out of the three relays call for a trip. High-pressure shaft Overspeed and rapid deceleration, low-pressure shaft Overspeed and rapid deceleration, and cross trip are signals that will trip the ETR relays. The JM connector is then used to write the trip signals to the PTBA terminal board.

Generator Breaker Close Circuit

The STCA board in R1 and the TCEA boards in the P1 core are where the signals to close the generator breaker come from. The TCEA boards use the PT signals from the PTBA terminal board to do the automatic synchronization computations and to deliver the permission signal to close the breaker. The STCA board in the R1 core simultaneously calculates a synchronizing permissive (synch check) and transmits a permissive to close the breaker. The TCTG board votes in favor of the automated synchronized signals by a margin of two to three. If R1 has provided the synch check signal and two out of the three automatic synch signals have been received, the TCTG board will let the breaker be closed.

DS200TCTGG1A Manual And External Trip Circuit

To start a trip when the contacts are opened, normally closed contact inputs can be plugged into the PTBA terminal board. Examples of these include emergency stop buttons. The K22, 23, 24, and 25 relays are tripped by these signals, which are read by the JN connection and written to the TCTG board. In relation to an ANSI standard device number for the Master Protective, these relays are referred to as the4. The PTR and ETR relay trip when the 4 are tripped because they are connected to a 24 V dc protection bus, which is de-energized when the 4. The TCEA board normally records the event back to the Control Engine and monitors the hardwire trip signals 1 through 3 for an emergency halt.

DS200TCTGG1A Features

• There are 21 plug-in relays in it. Additionally, it features two 12-pin connectors and three 50-pin connectors. The 50-pin connections have the IDs JLY, JLX, and JLZ allocated to them.
• The 12-pin connectors have the IDs JN and JM allocated to them. The board's 21 relays are delicate and need to be treated with extra care.
• Due to their electromechanical construction, relays are susceptible to damage. The board may also be harmed by static buildup. The 50-pin connectors are connected with ribbon cables. There are several 50-pin connectors, therefore when you replace the board, you run the risk of connecting the 50-pin connectors improperly.
• The inadequate installation will increase the amount of time the drive is offline and may also raise the downtime for other equipment nearby. Before removing the drive, turn off the power to it and check the way the wires are attached to the board to prevent any delays.
• The 21 plug-in relays' IDs begin with a K prefix and terminate with a number. The numbers are listed in order, starting with 1. K1, K5, K10, and K21 are just a few of the IDs.