Model LXi-1200 is a combined automatic and
manual across-the-line fire pump controller, applied where the capacity
of the power source permits full voltage starting of squirrel cage
motors. These controllers do not limit the inrush current or starting
torque of the motor. To use this type of controller, the power source
must be capable of supplying 600% of full load motor current, without
dropping the voltage at the input terminals of the controller by more
than 15% of the rated voltage.