GE IS215VPROH2BC Emergency Turbine Protection Board

Frequently asked questions
Q:What is the GE IS215VPROH2BC?
A:The IS215VPROH2BC is a VPRO Protection Board used in the GE Mark VI Speedtronic® turbine control system. It performs protection-related processing and operates as part of the Mark VI control architecture.

Q:What applications is the IS215VPROH2BC used in?
A:The board is commonly used in gas turbine, steam turbine, and power generation control systems that employ the GE Mark VI platform.

Q:What is the primary function of the IS215VPROH2BC?
A:The board processes protection signals, exchanges data with the control processors, and supports turbine protection functions within the Mark VI system.

Description

The GE IS215VPROH2BC is a VME Protection Board used in the GE Mark VI Speedtronic® turbine control system. It serves as part of the protection subsystem, processing protection-related signals and supporting the safe operation of gas and steam turbine control applications. The board is designed for installation in the Mark VI VME rack and operates with other control and I/O boards within the system architecture. The IS215VPROH2BC interfaces with terminal boards through the VME backplane and associated I/O modules to receive field signals required for turbine protection functions. It works with the control processors to monitor operating conditions and exchange data within the Mark VI control platform. The board is designed as a field-replaceable component, allowing maintenance or replacement without changes to the overall control system configuration when the correct hardware revision is used. As part of the Mark VI series, the IS215VPROH2BC is used in power generation facilities and industrial turbine control systems. It supports the protection functions required for turbine operation and integrates with compatible Mark VI hardware to provide reliable system performance during continuous plant operation. Its modular construction allows straightforward installation and maintenance within existing Mark VI control cabinets.

Parameter

Model: IS215VPROH2BC Emergency Turbine Protection Board 
Operating Voltage Rating: 125 V DC Nominal (From primary protection bus)
Main System Frame Rate: 100 Hz internal processing frequency
Maximum Solenoid Drivers: 3 Trip Solenoids driven simultaneously per module
Total System Interlocks: 7 Trip Interlock Inputs supported via TREG
Operating Temperature: 0 °C to +60 °C (+32 °F to +140 °F)
Storage Temperature: -40 °C to +85 °C (-40 °F to +185 °F)
Cooling Requirements: Natural convection within the standard VME rack chassis

Application areas

GE IS215VPROH2BC VPRO card serves as the core Emergency Protection Board. It operates with independent Triple Modular Redundancy (TMR) diagnostic loops to perform automatic machine safety overrides.The specific, field-level application areas include:

• Boiler Drum Level Safety Control: Monitors critical level sensors in heat recovery steam generators (HRSGs) to shut down steam feeds during dangerous water swell or low-level conditions.
• Fuel Valve Position Overrides: Interfaces with secondary hydraulic servos to drive fuel control valves directly into a fully closed (0% open) position during an emergency.
• Emergency Overspeed Trip Execution: Processes high-speed pulse inputs from magnetic pickups to execute emergency mechanical trips if the turbine shaft exceeds 100% rated RPM.

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