GE IS215VPROH1BD VPRO Emergency Turbine Protection Module

IS215VPROH1BD (VPRO) is a safety-critical triple modular redundant protection assembly exclusively developed for GE Speedtronic Mark VI turbine control systems. It serves as an independent emergency protection unit separated from the main control rack, undertaking core safety tasks including hardware overspeed monitoring, trip solenoid driving and emergency stop logic execution, which provides hardwired trip protection to prevent turbine runaway faults under all operating conditions.

This stacked dual-board VME module matches TREG and TPRO terminal baseplates, adopting fully conformal coated PCB with high-voltage isolation circuits to withstand high temperature, dust and heavy electromagnetic interference in turbine halls. It supports hot-swap online maintenance without unit shutdown, and the TMR voting architecture ensures valid protection output even if one single channel fails, complying with power plant safety interlock standards.

Main Specifications

• Brand: GE General Electric; Model: IS215VPROH1BD; Series: Speedtronic Mark VI Turbine Safety Control
• Hardware Architecture: Stacked dual-board structure, TMR triple modular redundant safety logic processor
• Speed Input: Multi-channel magnetic pickup pulse input, frequency range 2Hz–15kHz for overspeed detection
• Trip Output: 12 isolated relay outputs, driving up to 3 groups of 125VDC trip solenoids via TREG terminal boards
• Communication Interface: Front-panel IONet fiber Ethernet ports for data interaction with Mark VI main CPU
• Power Supply: 24VDC auxiliary power input, 125VDC trip solenoid power loop, low power continuous operation
• Physical Parameter: Standard 6U VME single slot, weight approx 1.5kg, cabinet IP20 protection rating
• Operating Environment: -25℃ ~ +70℃ working temperature, 5%–95% RH non-condensing, shock and vibration resistant industrial grade
• Diagnostic Indicators: Multi-group front LEDs showing power status, fiber link, channel fault and trip trigger alarms
• Certifications: CE, UL industrial certification, compliant with power generation turbine safety protection standards

Core Functions

• Independently collect rotor speed pulse signals from magnetic pickup sensors, execute hardware overspeed judgment to trigger hard trip when exceeding safety threshold.
• Control 125VDC trip solenoid circuits through TREG terminal boards, cutting fuel and steam supply to realize rapid turbine emergency shutdown.
• TMR triple redundant channel design with built-in fault voting algorithm, automatically filtering single-channel signal errors to avoid false unit trips.
• IONet fiber communication transmits real-time protection status and fault codes to Mark VI main CPU and upper monitoring HMI for centralized alarm display.
• Full-channel self-diagnosis detects sensor wire break, solenoid circuit short/open and communication disconnection, uploading fault records instantly.
• Hot-swappable modular design allows independent module replacement without powering down the entire safety protection rack to minimize unit downtime.

Application Scenarios

• Safety protection spare replacement for GE Mark VI gas turbine and steam turbine control racks in combined cycle power plants and thermal power stations.
• Overspeed trip spare parts for petrochemical large centrifugal compressors and offshore platform power generation units.
• Maintenance backup inventory for waste heat power stations, metallurgical furnace power generation safety control cabinets.
• Matching protection module paired with Mark VI main CPU, TREG trip terminal boards and turbine magnetic pickup speed sensors.
• Retrofit replacement for aging turbine safety systems suffering overspeed detection failure and trip solenoid control malfunction.

• Global aftermarket spare supply for power plant maintenance teams maintaining legacy GE Speedtronic Mark VI turbine control equipment worldwide.