Description
GE IS200VPROH2B — Mark VI Emergency Turbine Protection Board
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | IS200VPROH2B |
| Manufacturer | General Electric |
| System | Mark VI Speedtronic |
| Board Function | Emergency Turbine Protection |
| Board Designation | VPRO |
| Protection Application | Independent turbine emergency/overspeed protection |
| Thermocouple Inputs | 9 |
| Analog Current Inputs | 3 |
| Input Hardware Filter | 4 ms |
| Frame Rate | Up to 100 Hz |
| MPU Pulse Rate Range | 2 Hz to 20 kHz |
| Communication | Ethernet / IONet |
| Associated Boards | TPRO, TREG |
| Redundancy | Three VPRO boards in the protection architecture |
| Onboard Power | Generates 5 VDC and 28 VDC from cabinet power distribution |
| Operating Temperature | 0 to 60 °C reported by secondary technical references |
| Functional Revision | B |
| Power Variant | H2 lower-power VPRO configuration |
The nine thermocouple channels are associated with exhaust-temperature protection, while the three analog current inputs and synchronization-related functions provide additional turbine protection inputs.
Product Introduction
The GE IS200VPROH2B is an Emergency Turbine Protection board used in the GE Mark VI turbine control architecture. Unlike a conventional process I/O card, the VPRO board belongs to the turbine’s independent protection subsystem and works with associated TPRO and TREG hardware to provide emergency trip and overspeed protection separate from the primary turbine control functions.
The GE IS200VPROH2B supports nine thermocouple inputs for exhaust over-temperature protection, three analog current inputs, and protection-related synchronization functions. It also communicates through the Mark VI IONet architecture. The H2B designation matters during replacement because this is the lower-power VPRO configuration and is intended to support a single TREG board.
IS200VPROH2B
Application Scenarios & Field Pitfalls (Engineer’s Perspective)
The IS200VPROH2B is used in gas turbine protection systems, steam turbine protection systems, emergency overspeed protection, and Mark VI turbine trip architectures. In a properly configured Mark VI installation, the VPRO subsystem provides an independent protection path rather than relying exclusively on the main turbine-control processor. The board’s relationship with TPRO and TREG is therefore more important than simply matching the PCB part number.
Field pitfalls to check:
- H2B versus H1 is not a cosmetic difference. The H2B is the lower-power version and supports one TREG board. If the existing installation requires two TREG boards, the H2B should not be substituted for the appropriate H1 configuration.
- Do not treat it as a standard Mark VI I/O card. VPRO belongs to the turbine protection subsystem and its wiring, voting, trip-solenoid interfaces, and associated terminal boards must be considered together.
- Verify the complete protection architecture. Check the VPRO board quantity, TPRO/TREG arrangement, IONet connections, trip wiring, and cabinet configuration before replacement.
- Verify board revision and hardware condition. The B revision should be matched where the installed configuration requires it. For used or surplus boards, inspect connectors, PCB coating, terminal interfaces, and signs of thermal or electrical stress.
- Protection testing is mandatory after replacement. A replacement board should not be placed directly into service merely because it powers up and communicates. Overspeed, trip, voting, thermocouple, synchronization, and associated protection functions should be validated according to the plant’s approved test procedure.
Related Products
- GE IS200VPROH1B — Higher-power VPRO configuration; relevant where the protection module requires the additional TREG support that the H2B does not provide.
- GE IS200VPROH2B — Exact H2B VPRO reference; lower-power configuration supporting one TREG board.
- GE IS215VPROH2B — VME protection assembly associated with the VPRO H2B function; not simply the same physical PCB format as .
- GE TPRO — Terminal-board component associated with the VPRO emergency protection architecture and turbine trip interface.
- GE TREG — Terminal board used with VPRO for turbine trip-solenoid circuitry; the number of TREG boards is particularly important when selecting H1 versus H2 VPRO hardware.
- GE TRPG — Associated trip-power return/interface hardware used in the turbine emergency trip circuit.
- GE IS200VPWRH1A — VPRO-related power subassembly; useful when diagnosing power problems within the protection assembly rather than replacing the VPRO board itself.
Procurement Note
For , the critical matching parameters are VPRO H2 power configuration, functional revision, TREG quantity, TPRO/TREG architecture, IONet configuration, and turbine protection application. Do not substitute an H1 or another VPRO revision solely because the board appears physically compatible.
For a shutdown-critical turbine protection spare, the safest procurement record should include the complete board number, revision markings, existing VPRO/TREG arrangement, and cabinet location. Verify the installed configuration against the applicable GE Mark VI documentation before commissioning.
