Q: Why would you want to allow your wind turbine to free spin?

fooliosfoolios Solar Expert Posts: 53 ✭✭
Looking up brake info, I see options on the brakes.
Why would free spin be an option? I read free spin happens when loads are missing and the battery is overvoltage; which could result in the destruction of the turbine.

Switch Positions:

  • Up -- Turbine is connected to the battery or rectifier. (Switch is closed)
  • Middle -- Turbine is fully disconnected, free spinning.
  • Down -- Turbine wires are shorted together. Brake is on.


  • EstragonEstragon Registered Users Posts: 4,454 ✭✭✭✭✭
    Maybe so you can work on it with circuits open, check to make sure it spins with no load, etc?
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
  • mcgivormcgivor Solar Expert Posts: 3,289 ✭✭✭✭✭
    Kind of what I was thinking, a neutral gear of sorts, to test the bearings without load or brake.
    1500W, 6× Schutten 250W Poly panels , Schneider MPPT 60 150 CC, Schneider SW 2524 inverter, 400Ah LFP 24V nominal battery bank 
    Second system 1890W  3 × 300W No name brand poly, 3×330 Sunsolar Poly panels, Morningstar TS 60 PWM controller, no name 2000W inverter 400Ah FLA 24V nominal used for water pumping and day time air conditioning.  
    5Kw Yanmar clone single cylinder air cooled diesel generator for rare emergency charging and welding.
  • fooliosfoolios Solar Expert Posts: 53 ✭✭

  • BB.BB. Super Moderators, Administrators Posts: 30,174 admin
    A lot of double pole double throw switch have a middle position where they are off...

    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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