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IS215VPROH1BE - Turbine Protection Terminal Board is available in stock which ships the same day.
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SPECIFICATIONS:
Part Number: IS215VPROH1BE
Manufacturer: General Electric
Series: Mark VI
Product Type: Turbine Protection Board
Number of Inputs: 4 - 20 mA
Number of Outputs: 6
Power Supply Voltage: 125 V dc
Thermocouple types: E, J, K, S, T
Span: -8 mV to +45 mV
Common Mode Voltage Range: ±5 V
Dimensions: 16.51 cm High x 17.8 cm
Operating temperature: 30 to 60 °C
No.of Analog Voltage Inputs: 6
Repair: 3-7 Day
Availability: In Stock
Country of Origin: United States
Manual: GEH-6721H
FUNCTIONAL DESCRIPTION:
IS215VPROH1BE is a Turbine Protection Terminal Board manufactured and designed by General Electric as part of the VI Series used in GE Speedtronic Control Systems. The Turbine Protection Board (VPRO) and its terminal boards (TPRO and TREG) form an independent emergency overspeed protection system. This system includes triple-redundant VPRO boards housed separately from the turbine control system, which manage the trip solenoids via the TREG board. The accompanying figures illustrate the cabling connections between the VPRO, TPRO, and TREG boards.
The VPRO board in the Protection Module
handles the emergency trip function and supports connections for up to three trip solenoids via the TREG and TRPG terminal boards. TREG supplies the positive 125 V DC to the solenoids, while TRPG provides the negative. Either board can initiate a turbine trip. VPRO manages emergency overspeed protection and emergency stop functions, controlling 12 relays on TREG. Nine of these relays are arranged in three groups of three to vote on inputs for the trip solenoids. Additionally, a second TREG board can be connected to VPRO through J4.
OPERATION:
The protection module primarily provides emergency overspeed (EOS) protection for the turbine using three VPRO boards. Additionally, VPRO offers backup synchronization check protection, supports three analog current inputs, and includes nine thermocouple inputs designed mainly for exhaust over-temperature protection in gas turbines.
The protection module features triple redundancy with three independent VPRO boards designated R8, S8, and T8 (formerly X, Y, and Z). Each board operates autonomously with its own I/O controller, allowing any one board to be powered down and replaced while the turbine remains operational without compromising protection. The system supports communication for initiating test commands, monitoring EOS diagnostics, and displaying the status on the operator interface. The VPRO board serves as the system's core, with a VME interface for programming and testing within a VME rack. To maintain independence, the backplane is neutralized when the board is installed in the protection module, ensuring no continuity between the three sections.
SPEED CONTROL AND OVERSPEED PROTECTION:
Speed control and overspeed protection are managed using six passive magnetic speed pickups. The first three are monitored by the controllers, which utilize the median signal for speed regulation and primary overspeed protection. The remaining three are dedicated to the R8, S8, and T8 VPROs in the protection module. The TPRO terminal board accommodates up to nine-speed pickups or active pulse rate transducers (TTL type), with three assigned to each VPRO board. Separate overspeed trip limits are defined in the application software for both primary and emergency overspeed protection, while an additional emergency trip limit must be configured in the I/O configurator to validate the EOS trip point.
WOC has the largest stock of OEM replacement parts for GE Speedtronic Control Systems. We can also repair your faulty boards and supply unused and rebuilt boards backed up with a warranty. Our team of experts is available round the clock to support your OEM needs. Our team of experts at WOC is happy to assist you with any of your automation requirements. For pricing and availability on parts and repairs, kindly contact our team by phone or email.
What is the primary function of the VPRO board in turbine protection?
The VPRO board provides emergency overspeed protection (EOS) and emergency stop functions for turbines. It also includes backup synchronization checks, analog current monitoring, and exhaust over-temperature protection features.
How does the triple redundancy of the protection module enhance reliability?
The triple redundancy system utilizes three independent VPRO boards (R8, S8, and T8). Each board operates autonomously, ensuring that the turbine remains protected even if one board fails or is replaced during operation.
What role do TPRO and TREG terminal boards play in the protection system?
The TPRO board interfaces with up to nine magnetic speed pickups or pulse rate transducers, while the TREG board supplies power and controls trip solenoids. Both boards work with VPRO to ensure accurate speed monitoring and reliable turbine trip functionality.
