SPECIFICATIONS
Part No.: IS215VPROH1BH
Manufacturer: General Electric
Country of Manufacture: United States of America (USA)
Size: 13 in. x 7 in.
Temperature rating: 0 to 60 oC
MPU Pulse Rate Range: 2 Hz to 20 kHz
MPU Pulse Rate Accuracy: 0.05 percent of reading
Number of Channels: 13
Product Type: Turbine Protection Board
Availability: In Stock
Series: Mark VI
Functional Description
IS215VPROH1BH is a turbine protection board developed by GE. It is a part of Mark VI control system. The Turbine Protection Board, along with the associated terminal boards (TPRO and TREG) constitutes an independent emergency overspeed protection system within the larger turbine control setup. This dedicated protection system is designed with triple redundant boards, segregated from the primary turbine control system. It controls the critical trip solenoids through the TREG terminal board, ensuring reliable and immediate emergency response mechanisms.
Functional Configuration and Control Setup
- The cabling arrangement between the board and the TPRO/TREG terminal boards is illustrated in the provided figures. Additionally, the board establishes an Ethernet connection specifically for IONet communications with the control modules.
- This connection facilitates seamless data exchange and communication between the VPRO and other control components within the system.
Role of VPRO in Emergency Protection
- Situated within the Protection Module P, the board plays a central role in executing the emergency trip function.
- Its primary responsibility lies in providing essential emergency overspeed protection and controlling the emergency stop functions critical for turbine safety. Moreover, the board governs the operation of the 12 relays on the TREG terminal board.
Trip Solenoid Control and Power Distribution
- The setup allows for the connection of up to three trip solenoids between the TREG and TRPG terminal boards.
- TREG supplies the positive side of the 125 V DC power to these solenoids, while TRPG complements this by providing the necessary negative side. Crucially, either board possesses the capability to initiate a turbine trip, ensuring redundancy and fail-safe operation. Additionally, it controls the 12 relays on the TREG board, with nine relays forming three groups of three to vote inputs, thereby controlling the three trip solenoids efficiently.
Importance of the Protection System
- This dedicated protection setup, involving VPRO, TPRO, and TREG terminal boards, plays a critical role in safeguarding the turbine system against emergency overspeed conditions.
- The redundancy in boards and the trip solenoid control mechanism ensure robust and reliable emergency responses, contributing significantly to turbine safety and operational integrity.
Installation Procedure
- Power Down the VME I/O Processor Rack: Begin the installation process by powering down the VME I/O processor rack. This step is crucial to prevent any electrical interference or potential risks during the installation.
- Slide in the VPRO Board and Secure Connectors: Carefully slide into the designated slot within the VME rack. Use your hands to push the top and bottom levers, allowing the edge connectors of the VPRO board to fit securely into place. Ensure a firm and snug fit for stable connectivity.
- Tighten Captive Screws on the Front Panel: After securely seating the board, locate and tighten the captive screws positioned at both the top and bottom of the front panel. This step is essential to firmly secure the board within the rack, preventing any potential movement or instability.
- Power Up the VME Rack and Check Diagnostic Lights: Once the board is securely installed, power up the VME rack. Upon startup, carefully observe the diagnostic lights situated at the top of the board's front panel. These lights indicate the board's status and functionality. Ensure all diagnostic lights illuminate as expected, confirming proper installation and operational readiness of the VPRO board within the VME rack.
MPU Characteristics
- The MPU exhibits an output resistance of 200 ohm and an inductance of 85 mH. These parameters influence the behavior of the output signal and its interaction with external circuits.
- At the terminal block, the MPU generates an output voltage of 150 V peak-to-peak (p-p). This voltage is delivered into a load impedance of 60 Kohm. It's noteworthy that the output voltage is insufficient to generate a spark, ensuring safety during operation.
- The MPU is designed to limit the maximum short circuit current to approximately 100 mA. This safeguard prevents excessive current flow in the event of a short circuit condition, protecting the MPU and associated components from damage.
- The system applies a normal mode load of up to 400 ohm to the input signal. This load serves to modify the voltage characteristics at the terminals, ensuring compatibility with downstream components and mitigating potential voltage fluctuations or irregularities.
- Despite the significant output voltage, the MPU output is engineered to provide insufficient energy for generating a spark. This safety measure prevents the risk of electrical arcing or sparking, enhancing operational safety and reliability.
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 IS215VPROH1BH?
It is a turbine protection board developed by GE under the Mark VI series.
What is the primary purpose of the protection module within the turbine system?
The primary role of the protection module is to provide emergency overspeed (EOS) protection for the turbine, utilizing three VPRO boards. These boards are crucial in ensuring immediate and effective emergency response mechanisms.
What additional functionalities does the board offer within the protection module?
The VPRO board, apart from EOS protection, includes backup synchronization check protection. Additionally, it accommodates three analog current inputs and nine thermocouple inputs, primarily intended for exhaust over-temperature protection in gas turbines.
How does redundancy function within the protection module's VPRO?
The protection module employs triple redundancy with three separate and independent VPRO boards - R8, S8, and T8 (originally X, Y, and Z). Each board can be powered down and replaced individually without compromising the overall protection system's integrity, even while the turbine is operational.
What components are contained within each board?
Each VPRO is self-contained, housing its I/O interface, processor, power supply, and Ethernet communications (IONet) to the controller. This autonomy ensures self-sufficiency and independent functionality of each board.
