IS200TPROH2B - Turbine Emergency Protection Terminal Board

SPECIFICATIONS:

Part Number: IS200TPROH2B
Manufacturer: General Electric (GE)
Series: Mark VI
Board Type: Emergency Protection Terminal Board
Functional Acronym: TPRO
Number of inputs: 9
Power Supply Voltage: 28 V dc
MPU Pulse Rate range: 2 Hz to 20 kHz
Speed Inputs: 3 Magnetic Pickup (MPU) Channels
Trip Outputs: 9 Relay Channels (for TREG Interface)
Hardware Revision: H2B
Isolation: 1500 Vrms (Galvanic Field-to-Logic)
Speed Range: 2 Hz to 20,000 Hz
Redundancy: Supports TMR (Triple Modular Redundant) Config
Connectors: (3) 37-pin D-type Connectors (JA1, JB1, JD1)
Operating Temp: -30 °C to +65 °C (-22 °F to +149 °F)
Size: 17.8 cm x 33.02 cm
Repair: 3-7 Days
Availability: In Stock
Country of Origin: United States
Manual: GEH-6421l

FUNCTIONAL DESCRIPTION:

IS200TPROH2B is a Turbine Emergency Protection Terminal Board manufactured and designed by General Electric as part of the Mark VI Series used in GE Speedtronic Gas Turbine Control Systems. TPROH2B provides the VPRO with speed signals, temperature signals, generator voltage, and bus voltage as part of an independent emergency overspeed and synchronization protection system. The protection system consists of triple redundant VPRO boards in a module separate from the turbine control system, controlling the trip solenoids through TREX (TREG, or TREL, or TRES). TPRO supplies inputs to all three VPRO boards. The following figure shows the cabling to VPRO from the TPRO and TREX terminal boards.

The VPRO board provides the emergency trip function. Up to three trip solenoids can be connected between the TREX and TRPX (TRPG, or TRPL, or TRPS) terminal boards. TREX provides the positive side of the 125 V dc to the solenoids, and TRPX provides the negative side. Either board can trip the turbine. VPRO provides emergency overspeed protection and emergency stop functions. It controls the 12 relays on TREG, nine of which form three groups of three to vote inputs controlling the three trip solenoids. A second TREG board may be driven from VPRO through J4.

INSTALLATION:

The TPROH2B and a plastic insulator mount on a sheet metal carrier, which mounts on a DIN rail. Optionally, the TPRO and insulator are mounted on a sheet metal assembly, which bolts directly into a panel. Speed signals and PT inputs are wired directly to the terminal block using typical #18 AWG wires. The TPRO_1C has barrier terminal blocks that are removable for board replacement. The TPRO_2C has a pluggable, Euro-type terminal block with removable terminals. The R, S, and T PPRO I/O packs mount on TPRO connectors JR1, JS1, and JT1, respectively. Three DC-37 pin conductor cables plug into TPRO connectors JX1, JY1, and JZ1, with the other ends attached to the selected backup trip terminal boards.

OPERATION:

The main purpose of the TPRO is to supply speed signals to VPRO for the emergency overspeed (EOS) protection for the turbine. In addition, TPRO supplies generator signals for backup synchronization check protection, three analog current inputs, and nine thermocouple inputs, primarily for exhaust over-temperature protection on gas turbines. VPRO provides 28 V dc to TPRO to power the three analog input transmitters.

SPEED CONTROL AND OVERSPEED PROTECTION

Speed control and overspeed protection are implemented with six passive, magnetic speed pickups. The first three are monitored by the controller, which uses the median signal for speed control and the primary overspeed protection. The second three are separately connected to the three VPROs in the protection module. Provision is made for nine passive magnetic speed pickups or active pulse rate transducers (TTL type) on the TPRO terminal board, with three being monitored by each of the three VPROs.

BACKUP SYNCH CHECK PROTECTION

TPRO provides inputs to the protection module for backup synchronization check. The generator and bus voltages are supplied from two single-phase potential transformers (PTs) secondary outputs, supplying a nominal 115 V rms. The maximum cable length between the PTs and the turbine control is 100 meters of 18 AWG twisted, shielded wire. Each PT is magnetically isolated with a 1,500 V rms rated barrier and a circuit load less than 3 VA.

World of Controls specializes in supporting the safety-critical infrastructure of GE Speedtronic systems by providing the IS200TPROH2B in both UNUSED and REBUILT conditions. Every TPRO board is subjected to rigorous validation, including MPU signal simulation and relay matrix logic testing, to ensure 100% reliability for your emergency protection system. We maintain a significant inventory of Mark VI protection boards to support emergency outages and scheduled maintenance. With global logistics and 24/7 technical assistance, WOC is your premier partner for high-reliability turbine protection hardware.

FREQUENTLY ASKED QUESTIONS:

What is the GE IS200TPROH2B?

The IS200TPROH2B is a Turbine Emergency Protection (TPRO) terminal board used in the GE Mark VI system. It handles emergency speed sensing and provides the relay interface for the turbine trip system.

How does the TPRO differ from the TRPA board?

While both are protection boards, the TRPA is typically the Primary protection board, while the TPRO is the Emergency or backup protection board. In a standard Mark VI setup, the TPRO works with the VPRO module to provide an independent layer of safety that is separate from the main R, S, and T control processors.

Can I use the IS200TPROH2B for active speed governing?

No. The speed inputs on the TPRO are dedicated exclusively to emergency overspeed protection. Active speed control and governor functions must be handled by primary I/O boards like the TTUR or PTUR.

How do I troubleshoot a Trip Relay Fault on this board?

Check the status of the diagnostic LEDs on the associated VPRO module and verify the continuity of the cables connected to the JA1, JB1, and JD1 ports. Most relay faults are detected by the board's internal feedback loops and are detailed in the Mark VI diagnostic alarm list.