Hubbell LXi-1100 User Manual

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Hubbell Industrial Controls, Inc.

Electric Fire Pump Controllers

Specifications for LXi 1100 Controllers * Solid StateSoft-Start/Stop* July 2002

The fire pump controller shall be factory assembled, wired, and tested as a unit assembly, shall conform to the requirements of the latest editions of NFPA-20andNFPA-70,and shall be Listed/Approved by and bear the label of UL/FM. The controller shall beHubbell-LexingtonLXi 1100 equipped withLXi logic.

The controller shall be of the combined manual/automatic type and be furnished in a floor mounted drip-proofsteel Type 2 enclosure with lifting eyes. The enclosure shall be red with anon-glaresurface. The controller shall be forsolid-statesoft-startstarting and designed, tested, and marked for the rated horsepower and3-phasevoltage and frequency in a 40 degree C. ambient.

The soft-startcontroller shall include afull-wavethree-phasecontrolled, open loop starting assembly consisting of control logic and a separatethree-phasefull-wave(anti-parallel)SCR thermistor assembly. The control logic shall be conformal coated and carry a 5 year warranty. Circuit adjustments and LED indicators shall be in the front of the control logic for accessibility and indicating.

The SCR controller shall be designed and rated to carry locked rotor current (600% of FLA) for 20 seconds as required by NFPA 20. SCR’s rated for 500% for 10 seconds shall not be acceptable. The SCR’s utilized in the thermistor assembly shall have a minimum 1200 volt PIV rating and Dv/Dt protection including 100 joule minimum MOV’s per phase.

The solid-statestarter shall supply a reduced voltage which will increase to full voltage along an acceleration ramp, adjustable between 0.5 and 10 seconds. The controller shall include a motor contactor bypass for the SCR unit when fullvoltage has been reached, or in the event of overheating of the SCR unit.

For normal stopping situations the controller shall initiate a stop sequence through the solid-stateunit. The starter shall decrease the voltage applied to the motor via an adjustable deceleration ramp (between 0.5 and 10 seconds) to a preset adjustable voltage level. The starter shall hold at this voltage level for an adjustable time period between 3 and 60 seconds to monitor for another starting cause. The deceleration/minimum speed hold feature of the controller provides reducedhydro-mechanicalstress in the system piping. If no new starting cause occurs during the decerlation/minimum speed period the controller will decelerate the fire pump to a full stop. The “Soft Stop” pushbutton shall cause the controller to initiate the same stop sequence through thesolid-statestarter. The “Emergency Stop” push button shall cause the controller to bypass thesolid-statestarter deceleration and stop immediately.

The soft-startmodule shall be provided with the following indicating diagnostics:

Power Available

Green LED

Controller Initiate

Blue LED


Yellow LED


Yellow LED


Yellow LED

Minimum Speed

Yellow LED

Emergency Stop

Blue LED

Shorted SCR


All electrical components shall be accessible from the front for maintenance and service. No components or component wiring shall be permitted on the door of the enclosure. The controller shall have a common operating handle for both the line isolating switch and the controller circuit breaker mounted in the enclosure flange. The minimum withstand rating for the fire pump controller shall be 150,000 amps RMS symmetrical at 200-600volts.The unit shall be Listed/Approved with UL/FM as “Suitable For Use As Service Equipment”.

The controller shall have separate and independent pressure settings with minimum run timing capable of a setting of up to 10 minutes. Settings of the pressures shall be established at the time of the field acceptance test. Provisions shall be included to allow manual or automatic shutdown in the field.

The controller shall have two sets of Form “C” contacts for Pump Running, Phase Reversal, and Power/Phase Failure, and one set of Form “C” contacts for Trouble. The Trouble contacts shall be activated by the following conditions: Invalid Configuration Memory, Emergency Manual Start, Pump Running, Phase Failure, Phase Reversal, Overload, Locked Rotor, Fail-to-Start,and Lockout.

The controller shall be equipped with LXi intelligent fire pump control system logic. All firmware shall benon-volatileflash based CPLD (complex-programmable logic device). Theboot-uptime for the logic shall be 3 seconds or less. Controllers that do notboot-upand allow the pump to be started in 3 seconds or less are not acceptable. An RS232 serial port shall be supplied for downloading event history to a PC for analysis and printing.

The digital pressure readings and settings shall be displayed on the LXi LCD mounted on the enclosure flange. The LCD screen shall be 4 x 20 (4 lines of 20 characters) per screen, and the screens may be scrolled to give a total of 320 characters. The real time display shall givesimultaneous 3-phasedigital amps and volts for the pump power, and digital display for the system pressure. Controllers that do not simultaneously display digital3-phaseamps,line-to-linevolt readings, and system pressure, are not acceptable.

The event alarm caches shall be compartmentalized, and no compartment shall over-rideany other compartment. The compartments allow for analysis of four types of information events without having to look through all events including those not related to a problem. Events shall be shown with Date and Time for each event occurrence:

1.Events that have occurred during a pump idle period

2.Events that occurred during the last start period

3.Events that occurred during the last run period

4.Events that occurred during the last stop period.

The LED displays shall be mounted on the enclosure flange and have an LED for the following:

Power Available

Fail to Start

Lockout On

Low Suction

Phase Reversal

Run Timer On

Pump Start Delay On

Shorted SCR

Pump Running

Locked Rotor


Overtemp SCR

Pressure Switch Start

Local Manual Start

Remote Start

Emergency Manual Start

Local Manual Stop

Start Timer/Accelerate

LED’s shall be multi-color;red for critical alarms, yellow for informational and green for status.

Programming of the LXi logic shall be from the touch pad mounted on the enclosure flange. Programming shall be password protected so that only authorized personnel can change the logic functions. The fire pump controller shall be ModelLXi 1100 equipped withLXi Logic as manufactured by Hubbell Industrial Controls, Inc.