Reliable General Electric / GE IS220TTURH1C Terminal Board

GE IS220TTURH1C Terminal Board

The General Electric IS220TTURH1C Terminal Board is an advanced component designed for use within industrial control systems, particularly within GE's Mark VIe and Mark VI control systems. As a high-performance terminal board, the IS220TTURH1C serves as a key component for interfacing control wiring with various field devices, ensuring secure and reliable connections for signal transmission and system monitoring.

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Part Number: IS220TTURH1C

Manufacturer: General Electric

Series: Mark VIe

Product Type: Terminal Board

Technology: Surface mount

Number of outputs: Generator breaker coil, 5A at 125 V dc

Power supply voltage: Nominal 125 V dc to breaker coil

MPU pulse rate range: 2 Hz to 20 kHz

With high-grade construction and precise engineering, the IS220TTURH1C offers unmatched reliability in both standard and critical control environments, such as power generation, petrochemical industries, and manufacturing. It simplifies the installation and maintenance of control systems, reduces wiring complexities, and enhances system performance. This terminal board ensures your system's seamless operation by providing clear, accessible, and secure electrical connections.

Pulse Rate Devices: Equipped to handle inputs from 12 pulse rate devices. These devices are responsible for sensing a toothed wheel to measure the turbine's rotational speed. This information is crucial for monitoring and controlling the turbine's operational speed.

Voltage Signals: The board receives generator voltage and bus voltage signals taken from potential transformers. These signals provide essential data for voltage monitoring, ensuring the generator operates within safe voltage levels.

Main Breaker Coil Control: Offers a 125 V DC output that is used to control the main breaker coil for automatic generator synchronization. This feature is essential for ensuring the safe and synchronized operation of the generator.

Shaft Voltage and Current Sensors: Inputs from shaft voltage and current sensors are received by the board. These sensors play a critical role in measuring induced shaft voltage and current, which is vital for the turbine's health and safety monitoring.

Overspeed Trip Signals: Handles three overspeed trip signals that are sent to the trip board. These signals serve as a safety mechanism to detect and respond to turbine overspeed conditions.

Additional I/O Signals: In addition to the overspeed trip signals, the board accommodates various other input and output signals from the trip board, expanding its role in monitoring and controlling the turbine's operation.

The turbine control system, often utilized in the Mark VIe system, incorporates various tests and sensor inputs to ensure precise monitoring and control of critical components like shaft voltage and current, generator and bus voltages, and generator breaker circuits. These tests and inputs contribute to the efficient operation and safety of the system. Let's delve into the details of these components:

Test Voltage Application: A test voltage with a frequency of 1 kHz is applied to the input of the PTUR shaft voltage circuit, which is primarily part of the R module. This test voltage serves as a diagnostic measure to assess the integrity and functionality of the shaft voltage circuit.

Shaft Current Measurement: The system measures shaft current in amperes AC. This measurement is performed using a shunt voltage, with peak-to-peak voltage levels of up to 0.1 V. Accurate measurement of shaft current is crucial for assessing the health and safety of the turbine.

Potential Transformer Outputs: The system utilizes two single-phase potential transformers with secondary outputs supplying a nominal 115 V rms. These sensors are essential for monitoring generator and bus voltages. The reliable measurement of voltage levels is vital to ensure the safe operation of the generator.

Loading and Isolation: Each input from these sensors imposes a loading of less than 3 VA. Additionally, each PT (Potential Transformer) input is magnetically isolated with a 1,500 V rms barrier, ensuring the safety and integrity of the measurement process.

Cable Length: The system accommodates cable lengths of up to 1,000 feet, utilizing 18 AWG wiring for these sensor connections. This extended cable length capability provides flexibility in installation and system configuration.

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