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IS215VPROH2BC

IS215VPROH2BC - Turbine Protection Board

IS215VPROH2BC - Turbine Protection Board IS215VPROH2BC - Turbine Protection Board

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SPECIFICATIONS

Part No.: IS215VPROH2BC
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Temperature: 0 to 60 °C
Frame Rate: Up to 100 Hz
MPU Pulse Rate Range: 2 Hz to 20 kHz
MPU Pulse Rate Accuracy: percent of reading
Product Type: Turbine Protection Board
Availability: In Stock
Series: Mark VI

Functional Description

IS215VPROH2BC is a turbine protection board developed by GE. It is a part of Mark VI control system. The Turbine Protection System comprises the Turbine Protection Board (VPRO) and its associated terminal boards, TPRO and TREG, providing an independent and robust emergency overspeed protection system. The architecture involves triple redundant VPRO boards housed in a separate module from the turbine control system.

Features

  • Triple Redundant Boards: The boards, designed for triple redundancy, are located within a dedicated Protection Module. This setup ensures a highly reliable and fail-safe emergency overspeed protection system.
  • Independent Emergency Trip Function: VPRO board in the Protection Module is specifically dedicated to providing the emergency trip function. This ensures that in critical situations, the system has an independent mechanism for initiating emergency shutdowns, contributing to the safety of the turbine operation.
  • Ethernet Connection for IONet Communications: In addition to its primary functions, the board is equipped with an Ethernet connection for IONet communications with the control modules. This feature facilitates seamless communication and data exchange between the VPRO and other control components, enhancing the overall efficiency of the turbine protection system.
  • Trip Solenoid Connection: Up to three trip solenoids can be connected between the TREG and TRPG terminal boards. The TREG terminal board provides the positive side of the 125 V DC power to the solenoids, while the TRPG terminal board supplies the negative side. This dual-sided power supply setup ensures redundancy and resilience in the trip solenoid control system.
  • Emergency Overspeed and Stop Functions: The board assumes control over the emergency overspeed protection and emergency stop functions. This critical role allows the system to respond swiftly to overspeed conditions or emergencies, ensuring the safe shutdown of the turbine.
  • Relay Control on TREG: TREG plays a significant role in the system by controlling the 12 relays. Nine of these relays form three groups of three, implementing a voting mechanism for inputs that control the three trip solenoids. This redundancy in relay control enhances the reliability of the protection system.

Power Supply

  • Each board is equipped with its dedicated on-board power supply. This self-contained power source is designed to ensure the availability of essential voltages for the optimal functioning of the board.
  • The on-board power supply generates both 5 V DC and 28 V DC. These voltages are critical for powering various components and functionalities within the board, contributing to its comprehensive operation.
  • The on-board power supply receives its power from the cabinet Power Distribution Module (PDM), drawing 125 V DC. This centralized power source serves as a reliable and consistent foundation, ensuring a stable power supply for the VPRO boards.
  • With each VPRO board featuring its own on-board power supply, the entire protection module boasts three independent power supplies. This redundancy in power sources enhances the reliability of the system, minimizing the impact of potential power supply failures.
  • TREG, the terminal board associated with the protection system, is entirely controlled by the boards. This centralized control mechanism streamlines the coordination and operation of the Turbine Protection System.
  • The only connections between TREG and the control modules involve the J2 power cable and the trip solenoids. This simplified and direct connection scheme enhances the efficiency and reliability of the control architecture.
  • In simplex systems, a third cable extends from J1 to the TSVO (Turbine Servo Valve Output) terminal board. This additional cable is instrumental in carrying a trip signal to the
  • TSVO terminal board, thereby enabling a servo valve clamp function upon turbine trip.
  • The inclusion of a trip signal to the TSVO terminal board provides a crucial safety feature in simplex systems. This functionality ensures that, upon turbine trip, a servo valve clamp is initiated, contributing to a controlled and secure shutdown of the turbine.
  • The VPRO's centralized control over TREG and the simplified connections to control modules contribute to an efficient and streamlined control architecture. This design approach facilitates easy communication and coordination between the various components.
  • The inclusion of redundant power supplies and the direct control of TREG underscore a focus on redundancy and reliability. These features minimize the risk of system failures, ensuring the continuous and dependable operation of the Turbine Protection System.
  • The incorporation of a trip signal to the TSVO terminal board in simplex systems demonstrates a commitment to safety. The servo valve clamp function provides an additional layer of protection, ensuring a controlled shutdown in emergency scenarios.

Diagnostics for the Auto Synchronous Function

  • K25A Relay (synch check) Driver Mismatch Requested State:
    • This diagnostic message indicates a mismatch between the requested state of the K25A relay (used for synchronous check) driver and its actual state.
    • The mismatch suggests that the VPRO system is unable to establish a current path from VPRO to the TREx (Terminal Relay Extension) terminal board.
    • Possible causes for this issue include wiring faults, improper connections, or malfunctioning relay drivers. It may also indicate discrepancies in the configuration or settings of the relay driver.
    • Addressing this issue involves troubleshooting the relay driver circuitry, verifying the integrity of wiring connections, and ensuring proper configuration of the relay driver settings.
  • K25A Relay (synch check) Coil Trouble, Cabling to P28V on TTUR:
    • This diagnostic message indicates trouble with the coil of the K25A relay used for synchronous check, specifically related to cabling between the TREx and the TTUR (Terminal Transfer Unit Remote) terminal boards.
    • The trouble could stem from various issues, such as an open circuit between the TREx and TTUR terminal boards or the absence of a P28 V power source on the TTUR terminal board.
    • An open circuit in the cabling or a missing power source can prevent the proper functioning of the K25A relay's coil, leading to synchronization check failures and potential synchronization issues.
    • Troubleshooting steps involve inspecting the cabling between the TREx and TTUR terminal boards, checking for continuity, and ensuring the availability of the P28 V power source on the TTUR terminal board.

The WOC team is always available to help you with your Mark VI requirements. For more information, please contact WOC.

Frequently Asked Questions

What is IS215VPROH2BC?
It is a turbine protection board developed by GE under the Mark VI series.

What is the primary purpose of thermocouple inputs for gas turbine applications?
The thermocouple inputs in the VPRO are primarily intended for gas turbine applications. These inputs monitor exhaust temperatures and serve as a backup for over-temperature protection. There are nine thermocouple inputs in total, with three connected to each VPRO.

How are the thermocouple inputs utilized for over-temperature protection?
The thermocouple inputs act as a backup for exhaust over-temperature protection. In the event of temperature anomalies in gas turbine operations, these inputs provide an additional layer of monitoring to ensure the safety and integrity of the system.

What types of analog inputs are available, and how are they configured?
It supports analog inputs, including one 5, 10 V DC, and a selectable 4-20 mA input. Additionally, there are two 4-20 mA inputs. These analog inputs can be configured to accommodate various sensors and instruments, enhancing the versatility of the VPRO in different operational scenarios.

How are analog inputs connected to the VPRO, and what is the role of the terminal board?
Analog inputs, including the 5, 10 V DC, and selectable 4-20 mA input, as well as the two 4-20 mA inputs, can be connected to the TPRO terminal board. The board then feeds these inputs in parallel to all three VPROs. This parallel connection ensures that the analog inputs are distributed consistently across the modules.

Can the analog inputs be customized for specific requirements in gas turbine applications?
Yes, the analog inputs offer flexibility for customization. The ability to connect different types of analog sensors, including voltage and current inputs, allows users to tailor the monitoring capabilities to the specific requirements of gas turbine applications.