SPECIFICATIONS
Part No.: IS215VPROH2BD
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Voltage Rating: 24 V dc or 48 V dc.
Technology: Surface-mount
MPU Pulse Rate Range: 2 Hz to 20 kHz
MPU Pulse Rate Accuracy: 0.05 percent of reading
Product Type: Turbine Protection Board
Availability: In Stock
Series: Mark VI
Functional Description
IS215VPROH2BD is a Turbine Protection Board developed by GE. It is part of Mark VI series. The Turbine Protection Board plays a pivotal role in ensuring an independent emergency overspeed protection system. This system operates in conjunction with associated terminal boards (TPRO and TREG), collectively forming a robust safety mechanism. The primary function of this protection system revolves around emergency overspeed protection, an imperative safety feature within turbine operations.
Independent Emergency Overspeed Protection
- The protection system is structured around triple redundant VPRO boards, strategically placed in a dedicated module distinct from the turbine control system. These boards hold the responsibility of managing the trip solenoids, a critical component, through the intermediary TREG board.
- It also features an Ethernet connection, facilitating IONet communications with the control modules.
VPRO Board Functions in the Protection Module
- The VPRO board, situated within the Protection Module P, functions primarily to execute the emergency trip function. It accommodates the connection of up to three trip solenoids, linking to the TREG and TRPG terminal boards.
- While the TREG board supplies the positive side of the 125 V DC to the solenoids, the TRPG board provides the negative side. Importantly, either board possesses the capability to initiate the turbine trip, thereby ensuring redundancy and fail-safe operation.
Control and Functionality
- It is not limited to overspeed protection alone; it also oversees the emergency stop functions. Effectively controlling the twelve relays present on the TREG, nine of these relays are configured into three groups of three. These groupings act as voting inputs, collectively influencing the activation of the three trip solenoids. Furthermore, VPRO can drive a secondary TREG board through J4, enhancing the redundancy and backup functionalities of the system.
- The collective functionality of the VPRO, TPRO, TREG, and TRPG boards culminates in a highly reliable and fail-safe emergency overspeed protection system, fundamental for ensuring the safety and integrity of turbine operations.
Installation
- Begin the installation process by powering down the VME I/O processor rack to ensure safety during the installation procedure.
- Carefully insert the VPRO board into the designated slot. Use both hands to gently push the top and bottom levers, securely seating the edge connectors of the board.
- After properly positioning the VPRO board, tighten the captive screws located at the top and bottom of the front panel. This step ensures the board is firmly secured within the rack.
- Once the VPRO board is securely in place, power up the VME rack. Perform a thorough check of the diagnostic lights located at the top of the front panel to verify proper initialization and functionality.
- Cable connections to the TPRO and TREG terminal boards are established using the J3, J4, J5, and J6 connectors situated on the VPRO front panel. These connectors are of the latching type, providing a secure connection.
- Connector J7 is designated for the 125 V DC power input. For comprehensive information regarding diagnostics, refer to the dedicated section in the provided documentation.
- It is necessary to update the firmware to the latest version for optimal performance.
Other Features
- Inputs: The Expander Load Source Board boasts a versatile array of input options to accommodate various monitoring and control requirements. This includes inputs for passive speed pickups, generator and bus voltage measurements, thermocouples, 4-20 mA current or voltage signals, as well as specific inputs for trip interlocks and emergency stop functionalities. These inputs enable the board to gather critical data regarding speed, voltage levels, temperature, and current flow, ensuring comprehensive monitoring and control capabilities within the system.
- Outputs: On the output side, the board provides a range of functionalities to execute control actions based on the input data and system requirements. This includes outputs for trip solenoids and economizer relays, essential for implementing protective measures and optimizing system efficiency. Additionally, outputs for breaker relay commands and servo clamp relay contacts facilitate precise control over system components, ensuring safe and efficient operation under various conditions.
- Power Supply Voltage: With an input supply voltage of 125 V dc, ranging from 70 V dc to 145 V dc, and output voltages of 5 V dc and 28 V dc, the board ensures stable power distribution to support its functionalities and connected devices. These voltage specifications are designed to meet the power requirements of the board and associated components, ensuring uninterrupted operation and system reliability.
- Frame Rate: The high frame rate capability of up to 100 Hz enables the board to capture and process data at a rapid pace, facilitating real-time monitoring and control of system parameters. This high frame rate ensures that the board can keep up with dynamic changes in the system, enabling swift response times and precise control actions when necessary.
- MPU Characteristics: With specific output resistance and inductance values, the board ensures efficient signal transmission and compatibility with connected devices. Moreover, the maximum short circuit current and voltage output specifications provide important safety considerations, while the normal mode load applied to input signals ensures accurate signal processing and reliable operation.
- MPU Cable Requirements: The MPU cable requirements specify the maximum distance and cable characteristics for sensors connected to the board. With a maximum distance of 300 m (984 ft) and specific capacitance and resistance values for shielded pair cables, the board ensures optimal signal integrity and reliability over extended distances. These cable requirements enable flexible sensor placement while maintaining robust communication between the sensors and the board, ensuring accurate data acquisition and control within the system.
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 IS215VPROH2BD?
It is a Turbine Protection Board developed by GE under the Mark VI series.
What is the primary function of the protection module within the turbine system?
The protection module serves as the primary system for Emergency Overspeed (EOS) protection for the turbine, employing three VPRO boards to ensure redundancy and reliability.
What additional functionalities does the board offer aside from overspeed protection?
In addition to emergency overspeed protection, the VPRO board incorporates backup synchronization check protection. It also features inputs for three analog current inputs and nine thermocouple inputs, primarily utilized for exhaust over-temperature protection, especially in gas turbine applications.
How is redundancy achieved within the protection module?
The protection module operates with triple redundancy, featuring three distinct and independent boards- R8, S8, and T8 (originally named X, Y, and Z). Any single board can be powered down and replaced without compromising the overall integrity of the protection system.
