Model LXi-1300 is a
combined automatic and manual reduced voltage autotransformer fire pump
controller applied where the capacity of the power source does not permit
full voltage starting of the motor. The controller is used with standard
three (3) lead squirrel cage motors. A heavy-duty autotransformer is
supplied with standard taps at 50%, 65% and 80% to reduce the starting
voltage to the motor. The autotransformer is factory wired to the 65% taps
unless otherwise specified when ordered.
The starting inrush
current drawn from the power source is reduced to approximately 25% of
normal when using the 50% tap, 42% of normal on the 65% tap, and 64% of
normal on the 80% tap.
An adjustable timing
relay is provided to control the time between reduced voltage start and
full voltage run. A manual "emergency run" operator is supplied for
emergency starting. When the operator is pushed "On" the motor starts
and runs at full voltage until the operator is pushed "Off".