Description
- Product Model: IS215WEMAH1A
- Manufacturer: GE
- System Platform: Mark VIe Wind Turbine Control
- Power Supply Voltage: 24 V DC nominal, with operational tolerance 18–32 V DC
- Power Consumption: Approximately 15–25 W depending on relay and I/O loading
- Relay Outputs: 9 relay contact outputs (configurable for status, alarms, and control functions)
- Communication Interfaces: Ethernet-based IONet for Mark VIe integration, plus internal cabinet bus links
- I/O Configuration: Multiple digital and analog channels for cabinet monitoring, including voltage sensing and discrete signals
- Backup Power Features: Integrated BPPS logic for monitoring and switching to backup power sources during grid faults
- Conformal Coating: Yes, for protection against humidity, dust, and vibration in nacelle/tower environments
- Operating Temperature Range: -20°C to +70°C (suitable for wind turbine cabinet mounting)
- Humidity Tolerance: 5% to 95% non-condensing
- Dimensions: Standard Mark VIe board form factor, approximately 262 mm (H) × 200 mm (W) approximate
- Weight: Approximately 1.0–1.5 kg
- Certification Standards: Compliant with IEC 61400 wind turbine standards, CE marked, designed for industrial/renewable energy EMC requirements
- MTBF: > 180,000 hours (estimated under typical wind operating conditions)
- Isolation: Galvanic isolation on relay contacts and critical I/O paths, typically 1500 V AC
Technical Architecture & Functional Positioning
The IS215WEMAH1A occupies a supervisory and interface role within the Mark VIe wind turbine architecture, typically installed in the main control cabinet or tower base. It serves as the central assembly for coordinating cabinet-level functions, combining WEMA (Wind Energy Main Assembly) for I/O management and relay control with BPPS (Backup Power Processing System) for power redundancy oversight. This dual-purpose design allows it to handle discrete control outputs, status monitoring, and backup power transitions while interfacing with the turbine’s IONet network for data exchange with the main controller and converter systems.
Core technologies include relay drivers for high-reliability switching (e.g., grid contactor control, brake activation, or alarm signaling), along with integrated monitoring circuits for DC power quality and backup source readiness. The board employs deterministic communication over IONet to report cabinet health and receive supervisory commands, ensuring synchronized operation during normal generation, fault ride-through, or emergency shutdown sequences. Self-diagnostic features continuously check relay coil integrity, contact states, and power parameters, forcing safe states on detected anomalies to comply with wind turbine safety and availability requirements.
From a systems perspective, its architecture supports high availability in variable renewable environments by enabling rapid response to grid events (e.g., LVRT/HVRT) and providing independent backup power management to prevent control loss during transients. This directly mitigates risks such as turbine shutdowns from power instability, enhancing overall fleet reliability and reducing O&M costs in large wind farms. The modular Mark VIe compatibility facilitates upgrades from legacy systems while maintaining wiring integrity, making it valuable for both new installations and life-extension projects in onshore and offshore wind applications.
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