Three Phase Full Protection Pump Control Panel L931

• Customization: Available
• Task: Program
• Structure: Closed-Loop
• Model NO.: L931
• Mathematical Model: Non-Linear
• Signal: Continuous
• Function: Automatic Control
• Certification: CE
• Condition: New
• Customized: Customized
• Material: Plastic
• Transport Package: Paper Carton
• Specification: CE
• Trademark: Leading Science & Technology
• Origin: China
• HS Code: 90328990
• Production Capacity: 5000PCS/Year

Product Description

Application: Control & Protect three phase pump, DOL
Single Pump Control Panel Model L931

L931 is a pump Automation designed to protect three-phase pumps from dry-well ,dead-head,jammed impeller,rapid cycle,overvoltage and undervoltage ,three unbalnace ,open phase,Phase reversal ,pump installed etc conditions and control pump on/off automatically as per the external signal from float switch ,pressure controller ,probe etc .
It can protect and control 380v,0.75-15kw pumps,
A calibration adjustment allows L931 to be calibrated your specific pumping applications,thereby reducing the possibility of false or nuisance tripping.
A proprietary microcontroller based on voltage,power factor and current-sensing circuit constantly monitors for power fluctuations ,overcurrent and underload conditions.
When an abnormality ,such as loss of suction,is detected ,L931 deactivates its output AC Contact and directly disconnects the pump motor.
L931 then begins its user selectable "restart delay"(dry-well recovery)timer.
When the timer expires or power is removed and reapplied ,L931 reactivates its output AC Contact and allows the pump to turn back on .

Our special design makes it a very reliable and sensitive protection against pump dry running without installation of any probe/sensor in the deep well.
 

Model	L931-B
Main technical data
.Start type	Direct on line
. Qty of controlled pump	Single pump
. Rated input voltage:	AC380V Three phase 50HZ/ 60HZ
. Rated output power:	0. 75kw-4kw (1 hp-5. 5hp) 5. 5kw-11kw (7.5hp-15hp) 15kw (20hp)
Protection function	Over load protection Pump stalled protection Dry run protection Under voltage protection Over voltage protection Repeat start protection Phase unbalance protection Phase reversal protection Open phase protection
Control characteristic	Connecting 0.5-4.5V pressure transmitter to replace pressure switch Pump start and stop according to different pressure value setting
Other features	LCD screen displaying dynamic real time pressure value Pump start and stop pressure value can be easily setting on the LCD screen Pump accumulative running time recording Pump last five faults record displaying Presenting one dry contact point (BA port) Present RS485 port Present user remote monitor LCD screen locked function under Auto state Push button calibration
Main installation data
Working temperature Working humidity Degree of protection Install position Unit dimension (L x W x H)	-25ºC-- +55ºC 20%--90%RH, no drips concreted IP54 Wall mounting 310 x 220x 120mm

Main Spec:
Rated Input Voltage: AC 220V/50HZ, Three Phase
Rated Output Power: 0.75KW-4KW / 5.5KW-11KW / 15KW

Main Features:
-Built in function switch:
Applied for water supply by liquid level control or booster
Applied for drainage by liquid level control
-Auto/Manual switch
-Starts and stops the pump in accordance with the different liquid level or pressure setting.
-Push Button Calibration
-Automatically stop the pump in the case of water shortage, protecting it from drying running without installing the float switch or liquid probe in the well
-Pump accumulative running time displaying
-Pump last five fault record displaying
-LCD displays pump running information
-Protect the pump against Over /Under Voltage; Over Current; Pump Shaft Rust; Rapid Cycle etc.
-Grade of Protection IP 54
-Visual & Audio alarm for fault prompt
-Present remote monitor
-Present one dry contacting point
-Visual & Audio alarm for fault prompt

About us:
Hunan Leading Science & Technology Development Co., Ltd is the professional manufacturer of intelligent pump control system applied for monitoring and protecting of pumps in home and industry use;

Leading Science & Technology has always been a leader in the production, research & development of intelligent pump control system and relative pump control products. Million of our prime products have been sold on the market for stable quality and reasonable price.

Leading Science & Technology has established stable relations with many pump producers and distributors from China and overseas.
Till now, Leading Science & Technology we have passed CE, ISO9001: 2008 certificate.