Hubbell Industrial Controls, Inc. 

4301 Cheyenne Drive, Archdale, NC  27263 

Phone (336) 434-2800  •  Fax (336) 434-2803 

LXi-1100 Solid State Soft Start/Stop

Reduced Voltage Starting Fire Pump Controller Model LXi-1100 is a combined automatic and manual solid state reduced voltage soft start/stop fire pump controller, used when 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.

The starting inrush current is reduced as low as 40% of normal starting current through the use of silicon controlled rectifiers (SCR's) - see curves on back page. The SCR's control the applied voltage to the motor in a smooth, stepless manner, reducing the hydro-mechanical stress within the system piping. The acceleration rate is field adjustable between 0.5 -- 10 seconds. When the motor reaches full speed, or after 10 seconds, a by-pass contactor closes, removing the solid state starter from operation.

After a "minimum run" time of 10 minutes at full speed, and all conditions that initiated the start return to normal, the by-pass contactor is opened and the LXi-1100 reduces the applied voltage decelerating the fire pump motor to the "minimum speed" level (approximately 25% of full speed). The controller holds the motor at this "minimum speed" level for a period of up to 60 seconds. When the "minimum speed" period expires and no new starting conditions have occurred, the controller will decelerate the fire pump motor to a stop.

If during the "deceleration" period or the "minimum speed" period a new starting condition occurs, the LXi-1100 will immediately begin to re-accelerate the motor to full speed.

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".

Drawings and Publications

Volts HP Range Dimensions Schematic Field
200-208 15-50 11CE0011 11CS0011 11CF0011 Pub 193
220-240 15-60
380-415 15-100
440-460 15-125
550-600 15-150
200-208 60-150 11CE0021 11CS0011 11CF0011 Pub 193
220-240 75-200
380-415 125-300
440-460 150-400
550-600 200-400

Catalog Literature

LXi-1100 Specifications
July 2002
Brochure 6300M
May 2004
Price List 6300M
October 2002
Options Price List 6300AM
November 2002

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