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Single Pump Water Pump Controller , Single Phase Submersible Control Panel For Flats

Hunan Leading Science and Technology Development Co.,Ltd
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Hunan Leading Science and Technology Development Co.,Ltd
City: Changsha
Province/State: Hunan
Country/Region: China
Tel: 86-731-84471500
Contact Person:
Mr Steven Ma

Single Pump Water Pump Controller , Single Phase Submersible Control Panel For Flats

Brand Name : LEADING
Model Number : L921
Certification : CE
Place of Origin : CHINA
MOQ : 1 set
Price : Negotiable
Payment Terms : D/A, D/P, T/T
Delivery Time : 30-35 days
Packaging Details : Carton
Phase : Single phase
Pump controlled quantity : one pump
Enclosure protection grade : IP54
Displaying : LCD display
Liquid level transfer distance : ≤1000m
Unit dimensions ( L x W x H) : 30.2 x 24x 12cm
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Products Brief :


L921 is applied for automatic liquid

level control / pressure control and effective protection for duplex pumps of with AC220V, 50hz, single phase output power 0.37 to 4kw (0.5hp-5.5hp),direct start, including stainless steel or cast iron submersible pump,centrifugal pump, sewage pump etc.Model L921 has many operation modes by adopting different electric installations. An important feature that makes the difference between Model L921 and common On/Off pump control box is the probe / sensor free in the well. Our special design makes it a very reliable and sensitive Protection against pump dry run without installation probe / sensor in the well.


Model L921 is useful in all cases we need to control and protect single pump managing its turn-on and turn off by different electric installations.


Typical usage scenarios include:
-Houses
-Flats
-Holidays houses
-Farms
-Water supply from wells
-Irrigations of greenhouses, gardens, agriculture
-Rain water reuse
-Industrial plants
-Waste water tank / Sewage sink


Main Technical Specifications


■ Rated Input Voltage…………………………………………………AC220V / Single Phase

■ Rated Frequency………………………………………………….……50Hz-60Hz (at option)

■ Rated Output Power of Motor………………………………0.37-2.2KW / 3-4KW(at option)

■ Short Circuit Trip ResponseTime………………………………………………………0.1sec

■ Dry Running Trip Response Time………………………………………………..……6sec

■ Over / Under Voltage Trip Response Time……………………………………….…5sec

■ Pump Stalled Trip Response Time……………………..………………………….0.5sec

■ Over Current Trip Response Time………………………………………………5sec-5min

■ Recovery Time of Over / Under Voltage………………………………………..……2min

■ Recovery Time of Over Current…………………………………………………..…30min

■ Recovery Time of Dry Running.…………………………………………………..……30min

■ Over / Under Voltage Trip……..……………………………….…………………..……±15%

■ Dry Running Trip……………………………………………….…………………..………70%

■ Pump Stalled Trip………………………………………….……………………..……200%


① the Characteristic of Inverse-time, the stronger of the current, The shorter of trip response time)

② Percent of rated input voltage ( i.e if the rated input voltage is 220V, the Over voltage trip is

253V, the Under voltage trip is 187V)

③ Percent of load time of calibration ( i.e if the running ampere of pump motor is 6A during the

calibration, the dry running trip ampere is 4.2A)

④ Percent of load time of calibration ( i.e if the running ampere of pump motor is 6A during the

calibration, The pump stalled trip ampere is 12A)

HTTP: www.leading-china.com

E-mail:stevenma89@hotmail.com


ModelL921
Main technical data
Start typeDirect on line
Qty of controlled pumpSingle pump
Rated input voltage:

AC220V-240V Single phase

50HZ/ 60HZ

Rated output power:0.37kw-2.2kw (0.5hp-3hp)
Capacitor:Reserved space for installing start capacitor

Protection Offered:

Over load protection

Pump stalled protection

Dry run protection with sensor free

Under voltage protection

Over voltage protection


Application &

Control characteristic

Control and protect universal pump

Using water level sensor or float switch to control pump start and stop

Applied for water supply by liquid level control through float switch or liquid probe

Applied for water supply by pressure control through pressure switch and pressure tank

Applied for drainage by liquid level control through float switch or liquid probe


Other features

Push button calibration

Memory function when power off & recovery

Interactive LCD Screen


Main installation data

Working temperature

Working humidity

Degree of protection

Install position

Unit dimension (L x W x H)

-25℃-- +55℃

20%--90%RH, no drips concreted

IP54

Wall mounting

30.2 x 24x 12cm



Product Tags:

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