Tel: +44 (0) 1981 241668
www.leadingedgepower.com
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Page 20 of 48
Turbine Operation
The
LE-600 Turbine
is based on a simple design for ease of installation and reliable operation. You
may notice the following behaviour during normal operation:
•
Cut-in -
The turbine will not begin to charge the batteries until the rotor is spinning at
approximately 290 RPM. Whilst operating below this speed, the turbine
will be ‘off
-
load’
and freewheeling. Once the turbine output voltage becomes equal to the nominal battery
voltage (at around 290
RPM), the turbine will come ‘on
-
load’ and begin to deliver current
to the batteries. During the off-load stages of rotation, the blades will rotate very freely.
This allows the rotor to build up speed and allows aerodynamic lift to be generated by the
blades.
•
Normal Operation -
Once the rotor is spinning more than 290 RPM, current will be
delivered to the batteries. As the rotor speed increases, so too will the current and
voltage. Excessive wind speed may increase the battery voltage to a high level. Once this
happens the diversion charge controller will recognise that the battery voltage is too high
and begin 'dumping' power to the heater module.
•
Charge Regulation -
Once the charge controller has switched over to the dump load, the
turbine will no longer be charging the batteries. Instead the power from the turbine will be
delivered to the dump load (usually a resistive heater element). The battery voltage will
begin to drop to normal levels during the regulation period. Once the battery voltage is
back within acceptable limits, the charge controller will switch the turbine output back to
the batteries. Refer to the Charge Controller User Manual for specific operational
instructions. This arrangement is more effective than stop/starting the turbine incessantly.
•
Shut Down -
The run/stop switch should only be used to slow the unit prior to taking it
down or tethering the turbine
.
By activating the stop switch, the output from the cables of
the turbine are ‘shorted’ together. This effectively puts an infinite load on the generator
causing the turbine to stall. When the stop switch is activated, the turbine may still rotate
slowly during high winds, but the rotor blades will not be able to build up any significant
speed. It is not recommended that the stop switch is activated whilst the rotor is spinning
at high speed. This sudden braking action will stress the blades and other components.
Only a
ctivate the stop switch during a ‘lull’ when the rotor i
s not spinning excessively fast.
High winds - In certain high wind conditions, the rotor can overcome the electromagnetic
braking, which allows high currents to be produced in the stator coils. If this situation
occurs with the wind driving the braked alternator for prolonged periods, damage to the
turbine will occur.
•
High Winds -
Every effort has been taken to ensure that the
LE-600
will withstand the
forces exerted by strong winds. However, the raw power in high winds is immense and the
stresses placed upon the turbine are magnified by gusty and turbulent conditions. Where
possible the turbine should be shut down and tethered in advance of winds of 27m/s (60
MPH). This will decrease the wear and tear on the machine and will help to avoid a failure.
Protect the turbine from extreme winds as you would protect other items of your
property.
Note: Never allow the turbine to run off-load with no connection to a battery bank. Doing so will
allow open-circuit voltages to be generated by the turbine. These voltages may be dangerous and
may damage the stator coils within the turbine.
Summary of Contents for LE-600
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