DS200PTBAG1A - Protective Core Terminal Board

DS200PTBAG1A - Protective Core Terminal Board DS200PTBAG1A - Protective Core Terminal Board

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Part Number: DS200PTBAG1A
Manufacturer: General Electric
Series: Mark V LM
Product Type: Terminal Board
Availability: In Stock
Country/Region of Manufacture: United States
Manual: GEH-6153


DS200PTBAG1A is a Protective Core Terminal Board manufactured by General Electric as part of the Mark V Series used in gas turbine control systems. The signals for the core are terminated by the Protection Termination Module (PTBA), which is located in the core. On the PTBA terminal board, which is connected to the TCEB board, are input signals for the high and low-pressure shaft speeds, flame detection, generator and bus voltages, and generator currents. The core is additionally connected to the speed signals. The Turbine Trip (TCTG) board in the core is written directly after the PTBA terminal board reads the external trip input signals, generator and bus signals, and generator breaker closing signals. Through the PTBA terminal board, the TCTG board writes trip output signals and generator breaker closure signals to the device. Using a hardware jumper on the PTBA board, the TCEB board's audio alarm (horn) is powered.


JJR - Writes the high and low-pressure shaft speed signals to the TCQE board in the core.

JM - Reads and writes the emergency trip outputs to/from the TCTG board in the core, as well as the generator breaker signals (52GL).

JN - Reads and writes the external trip signals to and from the TCTG board in the core, writes the enable signal to the horn, and reads and writes the generator breaker signals (G125P).

JU - Writes the audible alarm (horn) enable, the flame detect, and the emergency Overspeed signals to the TCEB board in the core.

JV - Writes the PT and CT current signals as well as the generator and bus voltage signals to the TCEB board in the core.

JVA - Distributes the 335 V dc from the TCEB board in the P1 core to the flame detecting devices.

JJS/T - Not frequently used.


J1 enables the horn-based audible alarm. Silence yourself off.


The Mark V LM control system offers primary and emergency electronic Overspeed prevention for up to two turbine shafts on two separate levels. The Overspeed protection Big Block Language (BBL) blocks of the CSP in the R> control processor perform the primary Overspeed detection and trip initiation. These blocks make use of the turbine shaft speed sensors that are generally mounted on the P1 core's PTBA terminal board. The trip setpoints for the blocks are specified by the Control Constants. The I/O board's filter and scale (convert to the percent of rated shaft speed) the magnetic speed sensor pulses. The CSP Overspeed block starts a turbine trip when the scaled turbine shaft speed signal goes over a Control Constant setpoint.


Overspeed Magnetic Pickups on PTBA

Fig 1: Overspeed Magnetic Pickups on PTBA

The protective processors X, Y, and Z in the protective core P1 are responsible for emergency Overspeed protection. Primary Overspeed protection has no bearing on emergency Overspeed protection. The PTBA terminal board is equipped with turbine shaft speed sensors.


Bus Generator PT and CT Inputs on PTBA

Fig 2: Bus Generator PT and CT Inputs on PTBA

WOC has the largest stock of GE Speedtronic Mark V LM replacement Parts. We can also repair your faulty boards. WORLD OF CONTROLS can also supply unused and rebuilt backed up with a warranty. Our team of experts is available round the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on any parts and repairs, kindly get in touch with our team by phone or email.


What is the Purpose of the Termination Board?

The termination board is for the P core or independent protection module.

What are the various termination signal types that can be found in the DS200PTBAG1A?

The board has Overspeed magnetic pickups, flame detectors, bus voltages, generator voltages, and current, as well as synchronization, protective inputs, alarm horn enable and deactivate hardware jumper positions.

What role does the termination board play in Overspeed protection?

Connecting three magnetic speed pickups ended on board allows for Overspeed protection.