Whisper 500 Battery Charging Manual
Document #0023 Rev C
SOUTHWEST WINDPOWER
April 2006
10
Install Brake Switch
Mount the brake switch next to the Whisper
Controller on 500LV applications or near the
transformer with the 500HVLV. The brake switch
should be connected in parallel with the three
transmission wires between the wind generator and
the Whisper Controller (or transformer for HVLV
systems). The brake switch operates simply by
shorting all three wires together to generate
braking torque on the propellers.
Note:
Disregard the original “on” and “off” marking
on the switch. Moving the switch up is “brake
on”, and moving it down is “normal operation”.
Use three #6 AWG wires to connect a wire in
parallel with each of the three phases from the
Whisper Controller. The three wires are connected
to the three different terminals indicated on the
figure to the right. The order of the three wires
does not matter.
IMPORTANT
: be certain the switch is between the
turbine and transformer, and not between the
transformer and Whisper Controller (ie brake
switch is on primary side of step-down
transformer).
Connect first wire
Connect second wire
Connect third wire
To Whisper
Controller
Brake Switch
To Stop the Wind Turbine
Move brake switch handle up.
If the wind turbine blades do not stop in
30 seconds. Move handle down, wait for
wind speed to decrease and retry.
# 6 AWG
Brake Switch
