Description
- Product Model: IS215AEPAH1A
- Manufacturer: GE
- System Platform: Mark VIe Wind Turbine Control
- Functional Designation: AEPA (Alternative Energy Pitch Assembly / Power Assembly)
- Pitch Torque Rating: Designed for 20 Nm (or similar low-torque) pitch axis control in wind turbines
- Power Supply Input: Nominal 24 V DC from system distribution, with integrated regulation for stable module operation
- Communication Interfaces: Ethernet-based connectivity to Mark VIe controller via IONet or equivalent network
- I/O Capabilities: Supports analog inputs (configurable for voltage/current loops) and discrete signals for pitch motor feedback and control
- Operating Temperature Range: -30°C to +65°C, optimized for nacelle-mounted or hub environments
- Humidity Tolerance: Up to 95% non-condensing, with conformal coating for corrosion resistance in offshore/onshore conditions
- Mounting Type: Carrier-mounted assembly with hardware for secure installation in pitch control cabinet or axis box
- Dimensions (approx.): Compact board footprint, typically 220 mm x 160 mm x 90 mm including carrier
- Weight: Approximately 2.3 kg (including carrier and hardware)
- Protection Features: Built-in overvoltage, overcurrent, and thermal safeguards for reliable pitch operation
- Certification Standards: CE compliant, meets IEC 61400 wind turbine standards for electrical safety and EMC
- Mean Time Between Failures (MTBF): High reliability design suited for continuous wind farm duty, exceeding 100,000 hours
- Response Time: Fast actuator command processing (<50 ms typical) for precise blade pitch adjustment during gusts or load changes
Technical Architecture & Functional Positioning
The IS215AEPAH1A functions as a specialized control and power interface module at the pitch system layer in GE Mark VIe wind turbine controls. Positioned within the hub or nacelle pitch cabinet, it interfaces between the main Mark VIe controller and the pitch drive motors/actuators, handling power conditioning, signal conditioning, and closed-loop control for individual blade pitch angles. This ensures optimal aerodynamic performance, rotor speed regulation, and emergency feathering during high winds or faults.
Core technologies include integrated power supply regulation, analog signal processing circuits for position/velocity feedback, and robust communication links to the turbine’s IONet network. These elements solve key challenges in wind energy: maintaining precise blade pitch under variable wind loads to maximize energy capture while preventing mechanical overload, and providing fault-tolerant operation in remote, harsh environments where maintenance access is limited. The module’s carrier-mounted design facilitates quick replacement and includes diagnostic feedback channels for predictive monitoring of pitch system health.
The architecture supports redundant configurations in multi-axis pitch systems, allowing independent control of each blade while enabling coordinated shutdown or derating commands from the central controller. This modularity is essential for scaling to different turbine sizes and for integrating with modern condition monitoring systems.
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