panels for water
Duplex Lift Station Control Panel
The TEI Controls
Duplex Lift Station Control Panel provides the electrical equipment required
to operate a 2-pump lift station having motors of up to 25 horsepower at
460 volts 3-phase. It requires 4 floatswitches for level sensing and has
outputs for an external alarm light and a telephone dialer (not included).
It features a logic controller which can handle typical floatswitch failures
and can continue to operate the lift station on only one functioning floatswitch.
The unit is designed to be dependable, serviceable and simple to operate
using quality corrosion-resistant materials.
NEMA 4X fiberglass enclosure with stainless steel hardware 30 x 24 x 7"
NEMA-rated components. No IEC components are used.
Controls and indications are on an internal hinged plastic deadfront panel.
Operates from 208, 230 or 460 volt 3-phase supplies.
Internal control transformer provides 120 volt control circuit.
Suitable for 3-phase motors rated 1-10 HP @ 208V, 1-12.5 HP @ 230V, 2-25
HP @ 460V.
Magnetic trip motor circuit protectors
Separate phase failure protection for each motor
Separate ground-fault protection for each motor
Adjustable overload protection
Selectable manual/automatic reset for phase
failure, ground-fault, and overload
Seal failure detection
Standard 4-floatswitch operation for Off, Lead pump on, Lag pump on, and
High level alarm
A minimum off-time feature prevents frequent cycling of the motors. Unlike
a start delay timer, this feature allows a motor to start quickly under
Motors will be staged on following a power failure or other situation that
would call for both pumps to start simultaneously.
Low voltage circuits for floatswitches and seal failure provide improved
Logic circuitry allows controls to continue to function with multiple floatswitch
Separate indications for the status of each floatswitch allows the operator
to easily test the floatswitches
Deadfront-mounted control stations for each
motor with On, Off, Automatic, and Reset pushbuttons and Run, Off, Overload
alarm, and Trip indications. Unlike most pushbutton control systems, control
status is retained in memory in the event of a power outage so that the
system will automatically return to normal operation when power is restored.
Status indications for Pump 1 call, Pump 2
call, Pump 1 overtemp, Pump 2 overtemp, Alarm indication, and Telephone
dialer output signal
Output for external alarm light with two
discrete indications: two quick flashes followed by a pause indicates high
wetwell level, single flashes indicate floatswitch malfunctions. Reset
is automatic when the condition is cleared. For testing the alarm light,
one double-flash of the alarm occurs on powerup. Flash timing is designed
with a 25% duty cycle to extend lamp life.
A graphical representation of the system on the deadfront panel simplifies
troubleshooting by illustrating signal flow through floatswitches, indications,
fuses, and control stations.
For info concerning developement contact
, or fill out our quote form.
1996 - 2010 TEI Controls, all rights reserved
Last Update: 9/2/2010