Overview
The GE IS200VPROH2B, also identified by the base model IS200VPROH2B, is a turbine protection board used in the GE Mark VI control system. It supports emergency turbine trip functions and interfaces with associated protection hardware to monitor turbine trip conditions. The VPRO protection system operates independently of the main turbine control functions and uses dedicated terminal boards to connect field trip circuits.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | IS200VPROH2B |
| Brand | General Electric (GE) |
| Series | Mark VI |
| Product Type | Turbine Protection Board |
| Function | Emergency Turbine Protection |
| Origin | United States of America |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Frame Rate | Up to 100 Hz |
| MPU Pulse Rate Range | 2 Hz to 20 kHz |
| Input Filter | Hardware filter, 4 ms |
| Availability | In Stock |
Mark VI Protection Architecture and Signal Processing
The VPRO protection system provides an emergency trip path separate from the main turbine control functions. Its hardware architecture includes the VPRO protection board and associated terminal boards.
- VPRO board: Performs protection processing within the protection module. The system architecture uses triple-redundant protection channels.
- TPRO terminal board: Provides field signal connections associated with turbine protection and trip functions.
- TREG terminal board: Interfaces with the trip solenoid circuit and supplies the positive side of the 125 VDC solenoid power circuit, as described in the supplied documentation.
- TRPG terminal board: Provides the negative side of the trip solenoid circuit, according to the supplied documentation.
- IONet communication: The VPRO architecture uses Ethernet-based IONet communication with the control modules.
The stated 100 Hz frame rate, 2 Hz to 20 kHz MPU pulse range, and 4 ms input filter describe different timing and signal-processing characteristics. They should not be treated as interchangeable specifications.
Frequently Asked Questions
Q: What is the primary function of the IS200VPROH2B?
A: It supports emergency turbine protection and trip functions within the GE Mark VI protection architecture.
Q: What MPU pulse frequency range is specified?
A: The supplied specifications state an MPU pulse rate range of 2 Hz to 20 kHz. Confirm the applicable sensor interface and configuration in the relevant GE documentation before commissioning.
Q: Can the IS200VPROH2B be tested using the K25, K25A, and K25P relay procedures provided?
A: The supplied relay test procedures reference VTUR, TTUR, and TPRO points. They do not establish that every procedure applies directly to the IS200VPROH2B. Verify the board configuration, terminal assignments, and approved test procedure against the applicable Mark VI manual before testing.
Field Installation Guidelines
- Verify the hardware: Check the complete IS200VPROH2B model designation and board revision against the installed Mark VI system documentation.
- Observe electrical isolation: Follow site lockout procedures and isolate relevant power sources before removing or installing protection hardware.
- Check field wiring: Confirm terminal assignments, conductor identification, polarity, and trip circuit connections against the approved wiring diagrams.
- Inspect signal routing: Keep low-level speed sensor wiring separate from power conductors where required by the installation documentation. Apply the specified cable shielding and grounding practices.
- Validate protection circuits: Test trip inputs, relay outputs, and associated solenoid circuits using approved procedures. Do not force control points or simulate generator voltage on an operating turbine without an authorized test plan.
- Confirm system operation: After installation, verify board diagnostics, communication status, and protection channel behavior in accordance with the applicable GE Mark VI commissioning documentation.
