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 Ideal for larger installations, the E Series from Milbank PowerGen™ highlights our induction based wind turbines that bring efficient, reliable, safe and quiet renewable energy to North America. Find out how Milbank, in partnership with Endurance Wind Power, can help design, manufacture and support the best wind energy turbines for your needs.
- Rated power: 55 kW @ 11 m/s
- Applications requiring 200,000+ kWh of electricity annually
- Schools, hospitals, manufacturing and fabrication companies
Features
- Gearbox – Gearbox is an in-line helical with a gear ratio of 11:1. Additionally, there is a hollow shaft for direct connection to the main shaft (no couplings).
- Induction Generator – Induction generator delivers grid-compatible power eliminating the need for an inverter, batteries or any other power electronics, thus improving efficiency, increasing reliability and lowering product costs.
- Turntable Yaw Bearing – Turntable yaw bearing is a 4-point contact ball bearing designed for high overturning and thrust loads and oscillatory motions.
- Slip Ring – Slip ring feeds output power to four high-voltage wires (hot, hot, neutral and ground) running down the tower connecting directly to the home and electric grid via a breaker panel, similar to any large appliance.
- Brake Disk – Large 16" brake disk provides high torque capacity, and is located close to the turbine rotor for maximum safety.
- Dual Fail-Safe Calipers – Dual pneumatic brake calipers operate independently to ensure redundant, fail-safe protection against over-speed.
- Main Shaft Bearings – Main shaft bearings were selected following detailed engineering analysis for extreme loading, maximum deflection and extended life. Bearings are housed in pillow blocks for self-alignment and ease of serviceability.
- Rotor Hub – The Rotor Hub is a sandwich construction for high strength and long life, with taper-lock bushing connections to the main shaft for easy alignment and high torque capacity.
- Fiberglass Blades – Fiberglass blades use high-performance airfoils designed specifically for insensitivity to roughness (bugs and dirt). A low Reynold’s number operation (low speed) and stall control (constant speed operation) make the Milbank wind turbine a quiet running turbine.
- Anemometer – Anemometer senses cut-in (4 m/s) and cut-out (25 m/s) wind speeds, providing additional levels of diagnostics and monitoring for optimum performance.
Specifications
| Turbine |
| Configuration |
3 blades, horizontal axis, downwind |
| Rated power @ 11 m/s |
55 kW |
| Applications |
Direct grid-tied |
| Rotor speed |
42 rpm |
| Cut-in wind speed |
7.8 mph (3.5 m/s) |
| Cut-out wind speed |
56 mph (25 m/s) |
| Survival wind speed |
116 mph (52 m/s) |
| Design lifetime |
30 years * |
| Overall weight |
8,800 lbs (3,990 kg) |
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| Rotor |
| Rotor diameter |
63 ft (19.2 m) |
| Swept area |
3120 ft2 (290 m2) |
| Blade length |
29.5 ft (9 m) |
| Blade material |
Fiberglass / Epoxy |
| Power regulation |
Stall control (constant speed) |
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| Generator |
| Frequency / voltage |
• 480 VAC or 600 VAC at 60 Hz
• 400 VAC at 50 Hz
• 480 VAC or 600 VAC at 60 Hz
• 400 VAC at 50 Hz |
| Phase |
Three phase or single phase |
| Type |
Induction generator |
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| Brake & Safety Systems |
| Main brake system |
Rapid fail-safe dual mechanical brakes |
| Secondary safety system |
Pitch control system (for over-speed regulation) using passive spring-loaded mechanism |
| Automatic shut down triggered by : |
• High wind speed
• Grid failure
• Over speed
• All other fault conditions |
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| Controls |
| PLC based |
Includes remote monitoring software |
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| Warranty |
| Turbine, controls |
5 years |
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| Towers |
| Types and heights |
Freestanding monopole:
100 ft (30.5 m) , 120 ft (36.5 m) or 140 ft (42.7 m)
Free-standing lattice:
100 ft (30.5 m) , 120 ft (36.5 m) or 140 ft (42.7 m) |
| Maintenance access |
• Working space inside the nacelle
• Top work platform and safety cable climbing system |
*Provided service and maintenance schedules are strictly followed.
Power Curve & AEP
Power Curve
Annual Energy Production
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