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Limited Service Fire Pump Controller
Page 3 of 12
I Introduction
The Hubbell Limited Service Fire Pump Controller provides automatic and manual control of
small electric motor driven fire pumps and booster pumps of 30 horsepower or less.
All Controller components are inside the cabinet with indicating lights and switch handles
located next to the door. A pressure switch initiates automatic starting of the pump motor. The
Controller monitors the power phases and voltage. The CIRCUIT BREAKER
DISCONNECTING MEANS handle has a door interlock feature to prevent opening the door
when the switch is closed. The Controller also has an EMERGENCY MANUAL CONTROL
handle to start the fire pump manually.
Control
Panel
Incoming
Phase
Line
Surge
Suppressor
To
Fire Pump Motor
L1 M1 T1
PLM
Pressure
Switch
EMERGENCY
MANUAL
CONTROL
Control
Transformer
CIRCUIT
BREAKER
DISCONNECTING
MEANS
Figure I-1 Block diagram of LX-1500 showing one phase
II Specifications and Certifications
Specifications
Voltage
208, 240, 380, 480C
Phase Loss/Reversal Module
A-B-C phase rotation
200 Series
300 Series
400 Series
208–240 VAC, 60 Hz, 3 phase
380–415 VAC, 50 Hz, 3 phase
440–480 VAC, 60 Hz, 3 phase
Maximum Voltage 10% of highest nominal voltage
Maximum Frequency Shift 0.1 Hz
Phase Loss 18% of low voltage in one phase