Photos of Wulf Test Field Electronics
November 2, 2009
The photos below illustrate the installation of the electronics used to measure the performance of small wind turbines at the Wulf Test Field from 1998 to 2009.
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Paul Gipe illustrating the Tri-Metric battery monitor circa 1998. Nomad data logger on the lower left. This was a third hand piece of equipment when installed that worked reliably for a decade before being replaced in late 2009. |
Bergey 850 charge controller on the left, disconnect switch and fused circuits, diversion controller, and DR inverter. |
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Trace disconnect switch, DR inverter, Pulse diversion controller, and on the lower right an AC service panel for the AC loads in the shed. |
Whisper H40 controller worked fine for the Whisper but wasn't up to the task for Selsam's Super Twin. |
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Two parallel diversion loads (air heaters) installed to try and handle the load of Selsam's Super Twin. These units replace a previous air heater. Both are rated at about 1.2 kW (30 V x 40 A). |
Voltage resistors for conditioning the 24 V DC to a the low voltage required by the Nomads signal circuitry. The resistors were sized by Second Wind's Ken Cohn. |
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Ohio Semitronics power transducer. It sends a conditioned signal to the Nomad logger. The unit uses a Hall effect current sensor (donut) on the line under study. |
Ohio Semitronics current transducer conditions the current signal to the Nomad logger using a Hall effect sensor. This unit is used on the DC positive after the controller. |
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Ohio Semitronics current transducer conditions the current signal to the Nomad logger. This unit is used on one of the AC legs from the turbine. |
Diversion load (air heater). This is the original version used for most of the tests between 1998 and 2008. It was insufficient to handle the output from Selsam's Super Twin and was replaced with two air heaters in parallel. |
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