Description
- Product Model: IS215WEMAH1BA
- Manufacturer: GE
- System Platform: Mark VIe Wind Turbine Control
- Power Supply Voltage: 24 V DC nominal, operating range 18–32 V DC
- Power Consumption: Approximately 20–30 W under maximum relay and I/O load
- Relay Outputs: 9 relay contact outputs + 3 solid-state relay outputs for control and interlocking functions
- Digital Inputs: 27 discrete digital inputs for status monitoring and command reception
- Analog Inputs: 2 thermistor temperature sensor inputs for cabinet thermal monitoring
- Communication Interfaces: Ethernet IONet for Mark VIe network integration, plus internal plug connectors for auxiliary boards
- Auxiliary Board: Integrated auxiliary PCB mounted centrally, providing additional components and signal conditioning
- Conformal Coating: Yes, for enhanced protection in humid, dusty, and vibrating wind environments
- Operating Temperature Range: -20°C to +70°C (designed for tower/base cabinet mounting)
- Humidity Tolerance: 5% to 95% non-condensing
- Dimensions: Standard Mark VIe PCB size, approximately 262 mm (H) × 200 mm (W) approximate
- Weight: Approximately 1.2–1.8 kg
- Certification Standards: Compliant with IEC 61400 wind turbine series, CE marked, EMC compliant for renewable energy applications
- MTBF: > 180,000 hours (estimated per typical wind operational profiles)
- Isolation: Galvanic isolation on relay contacts and input channels, typically 1500 V AC or equivalent
Technical Architecture & Functional Positioning
The IS215WEMAH1BA serves as a key supervisory interface board in the Mark VIe wind turbine control hierarchy, mounted in the main control cabinet (often tower base or nacelle-adjacent). It consolidates cabinet-level I/O management, relay actuation for interlocks and alarms, and thermal/power monitoring, while supporting an auxiliary board for expanded functionality. This positioning allows it to act as a bridge between field devices, converter controls, and the central turbine controller via IONet.
The architecture features discrete relay drivers (9 contact + 3 solid-state) for high-reliability switching tasks such as grid breaker control, yaw/pitch enable, or fault annunciation. Digital inputs aggregate status signals from switches, sensors, and safety chains, while thermistor inputs provide local temperature feedback for overheat protection. The integrated auxiliary board enhances signal routing and conditioning, with components like transformers, fuses, jumpers, heat sinks, and plug connectors ensuring robust operation under cyclic loads. Built-in diagnostics monitor relay states, input integrity, and power quality, triggering alarms or safe shutdowns as needed.
Engineering value stems from its contribution to system availability in variable renewable conditions—enabling quick response to grid events, environmental stressors, or internal faults while maintaining compliance with grid codes for ride-through and stability. The design supports scalable redundancy in Mark VIe setups, reducing single-point failures and facilitating predictive maintenance through detailed status reporting. In ESS-integrated wind systems, it aids seamless power flow management during storage charging/discharging cycles.
Typical Application Scenarios
- Mounted in main control cabinets of GE wind turbines for relay-based control of external devices, cabinet status monitoring, and thermal oversight in variable wind regimes.
- Used in onshore/offshore DFIG or ESS-enhanced turbines to coordinate interlocks, alarms, and power source transitions for uninterrupted operation.
- Serves as a field-replaceable unit in legacy Mark VIe wind fleets, preserving existing cabinet wiring during upgrades or repairs.
- Supports wind farm life-extension projects requiring enhanced I/O density and environmental ruggedness for extended service life.
- Applied in utility-scale installations demanding IEC 61400-compliant reliability for fault handling and grid support functions.
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