GE IS215VPROH1BD is a VPRO emergency turbine protection board for the legacy Mark VI Protection Module, subject to confirmation of the full H1BD nameplate.
- Protection architecture: Triple redundant VPRO boards in a protection module separate from the turbine control system
- Core functions: Emergency overspeed protection and emergency-stop functions
- Trip path: Up to three trip solenoids per TREG path between TREG and TRPG; TREG supplies the positive side and TRPG the negative side of 125 V dc
- H1B feature: Supports a second TREG board driven from VPRO connector J4
VPRO forms an independent emergency overspeed and emergency-stop subsystem, separate from the primary turbine controller. Three redundant VPRO boards independently evaluate protection inputs and control voted trip-relay paths through TREG. The VPRO scheme processes dedicated shaft-speed pickup pulses, emergency-stop and trip-interlock states and, where configured, generator/bus voltage, thermocouple and analog signals. It exchanges status with the control modules over IONet and drives turbine trip outputs through TREG/TRPG rather than serving as a general process I/O card. The protection path uses VPRO with TPRO, TREG and TRPG terminal boards; H1B can drive a second TREG through J4. VTUR/TRPG provides a separate primary protection path, allowing either the primary controller path or the independent VPRO path to trip the turbine. It is applied to Mark VI-controlled gas and steam turbines in power generation and process/mechanical-drive installations where independent overspeed and emergency-trip protection is required.
Important Notice: Verify the exact IS215VPROH1BD nameplate and the installed system's VPRO/TREG configuration. Do not substitute H2B data: GEH-6421M states that H2B omits second-TREG support.
Apter Power IS215VPROH1BD Manuals and Guides
Important Notice: The first link is the product-parameters PDF prepared only from the cited manufacturer information; the second link is the Apter Power product manual. Confirm the physical nameplate, current manufacturer documents, and host-system requirements before installation or replacement.
Independent emergency overspeed protection
Three redundant VPRO channels evaluate dedicated speed signals independently from the primary turbine controller.
Voted turbine trip operation
VPRO controls the TREG relay groups that vote trip commands to the turbine trip-solenoid paths.
Emergency-stop and trip-interlock handling
Processes configured hardwired emergency-stop and trip-interlock inputs in the protection module.
Dual-TREG H1B protection arrangements
H1B supports a second TREG through J4 where the unit's trip design requires the additional terminal board.
Read and follow the current GE Vernova documentation and host-equipment instructions before work. Verify the complete physical nameplate and system configuration.
1
Verify the complete IS215VPROH1BD nameplate; do not infer the trailing revision or interchangeability from the VPRO family name.
2
Do not replace H1B with H2B in an application using a second TREG; GEH-6421M says H2B omits the second-TREG function.
3
Treat all work as safety-critical turbine-trip work and follow the unit-specific lockout, replacement, configuration and proof-test procedure.
4
Confirm TPRO, TREG and TRPG board forms, J3/J4/J5/J6 cabling, J7 power, speed-pickup assignment and trip-solenoid circuits before energization.
5
Verify firmware, I/O configuration, overspeed setpoints, emergency-stop logic and relay/solenoid feedback diagnostics against the approved turbine protection design.
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