SPECIFICATIONS
Part No.: IS200TGENH1AAA
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Temperature: -30 to +65 oC
Product Type: Generator Monitor Terminal Board
Availability: In Stock
Series: Mark VIe
Functional Description
IS200TGENH1AAA is a Generator Monitor Terminal Board developed by GE. It is a part of the Mark VIe control system. In conjunction with the associated VGEN generator I/O board, the TGEN terminal board performs key monitoring and control functions related to generator operation in large-scale power generation systems, particularly steam turbine applications.
Features
- The TGEN terminal board, in combination with the VGEN board, performs continuous monitoring of three-phase generator voltages and currents. This includes real-time acquisition of phase voltages and line currents, which are essential for assessing generator operational status, electrical integrity, and load conditions.
- Integrated measurement algorithms within the VGEN board calculate total three-phase real power, reactive power, apparent power, and power factor. These parameters are critical for evaluating generator performance, optimizing power delivery, and maintaining operational efficiency within the generation system.
- For applications involving large steam turbines, the VGEN board implements Power Load Unbalance (PLU) functionality. The PLU logic monitors the symmetry of power distribution across the three phases. Any detected imbalance is flagged and addressed through control system intervention, which helps maintain mechanical and electrical stability in the generator-turbine system.
- The system supports Early Valve Actuation (EVA) capability, implemented through fast-response solenoids located on the associated TRLY terminal board. The EVA function enables immediate actuation of turbine control valves based on dynamic system conditions, enhancing turbine responsiveness during load transients or fault conditions. This contributes to faster regulation of power output and improved system efficiency.
- The VGEN and TGEN boards are designed for direct integration into the Mark VIe control architecture. This includes full support for high-speed communication with supervisory control elements and coordination with protection and diagnostic subsystems. Through this integration, the boards contribute to a unified monitoring and control strategy across the entire generator-turbine interface.
Installation Guidelines
Proper installation of analog current and potential transformer (PT) inputs is critical for accurate signal acquisition and safe operation within the monitoring and control system. The following procedures detail the correct handling of wiring and configuration for the terminal board and its associated components.
Analog Current and PT Input Wiring – Terminal Block 1
- Analog current inputs and PT signals should be terminated at Terminal Block 1 (TB1).
- This terminal block serves as the primary interface for connecting analog signals to the monitoring system.
- All wiring must be securely fastened to ensure signal integrity and minimize the risk of interference, distortion, or signal loss.
- Use shielded cables where applicable, and observe correct polarity and terminal assignments as per system documentation.
Current Transformer (CT) Connections – Terminal Blocks TB2, TB3, TB4
- Current transformers must be connected to dedicated CT terminal blocks TB2, TB3, and TB4:
- These blocks are specifically designed to accommodate CT circuits and feature fail-safe mechanisms to mitigate risks associated with open-circuit CT conditions.
- Each terminal block includes provisions to ensure safe disconnection and maintenance procedures without interrupting current flow through the CT secondary.
- CT leads must be terminated correctly, and attention should be given to ensure shorting links or protective grounding devices are in place when applicable.
Configuration Jumpers – J1A and J1B
- Jumpers J1A and J1B are used to configure the input scaling for analog input channels 1 through 4:
- These jumpers determine whether each channel is configured for current or voltage input.
- Selection must align with the connected transducer type and expected input range (e.g., 0–1 A, 0–5 A, or 0–10 V).
- Configuration should be performed with the system power off, and jumper settings must be verified against system design specifications before commissioning.
Installation Best Practices
- Adhere strictly to installation guidelines and system wiring diagrams.
- Ensure all connections are mechanically secure and electrically sound.
- Avoid routing signal wiring near sources of electromagnetic interference (EMI).
- Verify insulation resistance and continuity before energizing the system.
- Ensure compliance with applicable electrical codes and industry standards during all stages of installation.
Analog Inputs
- Current Inputs: Current inputs are typically in the range of 4-20 mA, providing a standardized method for transmitting process data. This range allows for accurate representation of current levels, facilitating precise measurement and control within the system.
- Voltage Inputs: Voltage inputs accept signals in the range of ±5 V dc or ±10 V dc. This versatility in voltage range enables the system to handle diverse voltage signals with precision and reliability, ensuring compatibility with different transducer outputs and signal levels.
- Transducer Distance and Cable Resistance: Transducers can be located up to 300 meters (984 feet) away from the control cabinet, allowing for flexible placement within the operational environment. The system accommodates this distance by accounting for the two-way cable resistance of 15 ohms, ensuring signal integrity and accuracy over long transmission distances.
- Input Burden Resistor on TGEN: A 250-ohm input burden resistor is installed on the TGEN terminal board. This resistor serves to optimize signal conditioning and ensure proper voltage or current measurement, enhancing the accuracy and reliability of the input signals within the system.
- Jumper Selection Options:
- Single Ended or Self-Powered Inputs: Users can select between single-ended or self-powered inputs based on the type of transducer and signal source. This flexibility allows for seamless integration of different input configurations, enhancing system versatility.
- Voltage or Current Inputs: Jumpers enable the selection between voltage and current inputs, allowing users to adapt the system to different signal types and measurement needs. This versatility ensures compatibility with a wide range of transducers and signal sources.
- Importance of Jumper Selection: Proper jumper selection is critical for configuring analog inputs to suit the application's needs accurately. By selecting the appropriate jumper settings, users can ensure optimal signal processing, accurate measurement, and reliable operation of the system, enhancing overall performance and efficiency.
The WOC team is always available to help you with your Mark VIe requirements. For more information, please contact WOC.
Frequently Asked Questions
What is IS200TGENH1AAA?
It is a generator monitor terminal board developed by GE under the Mark VIe series.
What diagnostic checks are performed on input signals?
Diagnostics include high/low limit checks on the input signal, both at the hardware and software levels. These checks ensure that input signals fall within acceptable ranges, detecting anomalies that could indicate system malfunction or component failure.
How are hardware limit checks different from software limit checks?
Hardware limit checks involve direct monitoring of input signals to determine if they exceed predefined thresholds. Software limit checks, on the other hand, are adjustable in the field and are implemented within the system's software to provide additional flexibility in defining acceptable signal ranges.
Can the software limit checks be adjusted?
Yes, the software limit checks are adjustable in the field, allowing operators to modify the predefined thresholds to suit specific application requirements or changing operating conditions.
Is open wire detection provided for voltage inputs?
Yes, open wire detection is included for voltage inputs. This feature detects open circuits in voltage input connections, alerting operators to potential wiring issues that could affect signal integrity or measurement accuracy.
How are relay drivers and coil currents monitored?
Relay drivers and coil currents are continuously monitored within the system. This monitoring ensures proper functioning of relays and associated components, detecting abnormalities such as excessive current draw or relay failure.
