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Grid Interconnect, Line Commutated, Synchronous Inverter

UL 508 Inverter (not the UL 1741 Inverter)

Dimensions
     Inverter 37" x 28" x 14"
     Choke 20" x 19" x 14"
Weight
     Inverter 135 lbs.
     Choke 175 lbs.
Peak Power rating for given alternator: 10 kw thru 20 kw = 25 kva
Operating Voltage
     Input 0 - 180 vac, 3 phase
     Output 208 -250 vac, 50 or 60 Hz single phase output
     DC Buss 0 - 210 vdc, Power Transfer at 40 vdc
Back Feed Protection
     Over/Under Voltage +/- 5%
     Over/Under Frequency +/- 1%
Power Factor 0.95 @ full load
Voltage Harmonic Distortion < 5% @ full load
Efficiency 95%
Operating Temperature of the inverter (electronics--best to mount the inverter in a garage or out building--perhaps even in basement) 35° F to 110° F (electronic only)
Operating Humidity 0 - 90% relative humidity without condensation
Cooling Forced Air
Mastermind.jpg (65134 bytes)
There would be a 125 amp breaker addeded to the circuit breaker box for the wind plant.   This breaker box probably has 400 amps--it controls a number of utility sheds, the barn and milking parlor for Jim Coenens place.  The Mastermind Inverter has a 125 amp breaker/disconnect on the lower right hand side .
This property owner is re-wiring his outbuildings and barn.  Old wiring techniques have led to all kind of problems for farmers.  This farmer is upgrading his wiring and circuitry in the barn, tool and storage sheds; at the same time, adding a wind turbine.   On a plywood sheet of 5/8 to 3/4", a new circuit breaker is mounted--along with the inverter, kilowatt hour meter and heavy duty inductor coil.

In this picture, the Mastermind Inverter is to the right of the circuit breaker box.  In-between these two component is a kilowatt hour meter.  This device allows a property owner to determine how much power is produced.  If a property owner decides to record monthly, yearly or even daily data, there would be that opportunity to do so.  The kilo-watt meter is included in the purchase of the complete wind turbine. 

To the bottom right, is a heavy duty induction coil. 

The power from the wind turbine is brought from a PVC pipe underground to the synchronous inverter.  The power from the inverter goes through a series of steps to synchronize to the existing utility grid. 

In this picture, a band saw just happens to be in the foreground

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