Hubbell Fire Pump Motor Controllers with Automatic
Transfer Switches (ATS) are designed to comply with the latest
standard of the National Fire Protection Association for the installation
and operation of centrifugal Fire Pumps (NFPA-20).
Model LXi-2200 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.