Description
Overview
The IS215VPWRH2A turbine protection board is part of GE’s Mark VIe protection architecture and provides an independent overspeed‑protection layer for gas, steam, and wind turbine systems. Designed as a VME‑based protection module, it operates separately from the main control processors to ensure that emergency trip functions remain available even during controller or network failures.
Technical Specifications
The module incorporates relay‑voting logic, high‑speed MPU signal processing, and multiple terminal‑board interfaces. Its mechanical layout includes a front communication panel and stacked rear boards containing power interfaces, test points, and thermal‑management components.
| Parameter |
Specification |
| Model |
IS215VPWRH2A |
| Product Type |
Turbine Protection Board |
| Product Series |
GE Mark VIe |
| Overspeed Trip Relays |
3 (simplex) / 9 (TMR) |
| Supported Terminal Boards |
TREG, TPRO, TRPL, TRPS |
| Solenoid Control Voltage |
125 VDC (positive/negative trip) |
| MPU Frequency Range |
2 Hz to 20 kHz |
| Speed Accuracy |
±0.05% |
| Communication |
VME bus, Ethernet/IONet (front panel) |
| PCB Protection |
Conformal coating, Group 2 classification |
| Revision |
Hardware Revision B |
| Dimensions |
21.1 × 18.8 × 26.2 cm |
| Weight |
0.56 kg |
| HS Code |
8537101190 |
| Origin |
USA |
| Condition |
New |
Functional Characteristics
The board processes turbine speed signals from multiple MPUs and executes overspeed trip logic based on configured thresholds. In TMR systems, the module participates in nine‑relay voting to ensure fault‑tolerant trip decisions. In simplex installations, three relays are used for primary trip control.
The module interfaces with TRPG terminal boards to energize or de‑energize trip solenoids, providing both positive and negative trip capability. Additional functions include breaker permissive logic, synchronization support when paired with TTUR modules, and shaft‑voltage/current monitoring through brush pickup assemblies.
The H2 version supports one TREG terminal board, while the H1 version supports two—an important distinction for system replacements or expansions.
Application Scenarios
The IS215VPWRH2A is widely used in:
-
Gas turbine overspeed protection
-
Steam turbine emergency trip systems
-
Wind turbine protection architectures
-
TMR and simplex Mark VIe installations
-
High‑integrity protection systems requiring relay‑voting logic
FAQ
Q: What is the main difference between the H1 and H2 versions? A: The H2 version supports one TREG terminal board; the H1 version supports two.
Q: Does the board operate independently from the main controller? A: Yes, it provides a separate protection layer with its own logic and hardware.
Q: What voltage is used for trip solenoid control? A: The module drives 125 VDC solenoids with both positive and negative trip capability.
Q: Is the board suitable for TMR systems? A: Yes, it supports nine‑relay voting logic for triple‑modular‑redundant architectures.
