Drainage Pump Control for Water Engineering

Our company is committed to becoming one of the world's leading suppliers of S521 Single Phase Pump Control System Pump Stalled Protection, Submersible Pump Control Box Smart Pump Controller Motor Stalled Protection, Single Phase Pump Control Panel LCD Display Running Status. We have obvious competitive advantages in terms of quality, price, delivery, technology and service, and win the trust of customers with stable quality and considerate service. Since the establishment of the company, we have been adhering to the core values of integrity and innovation. If you are looking for a supplier with good quality, fast delivery, excellent after-sale service, we will be your best choice. The mutual trust between managers and employees and between employees is helpful for dynamic enterprises to focus on long-term development. We treat our employees with respect and dignity, and we expect each employee to develop a sense of personal responsibility.

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

Detailed Product Description

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 Response Time………………………………………………………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)

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Tag: single phase pump controller,single phase submersible pump control panel

Each process has strict quality standards, which have been checked at various levels, so that the quality of our Drainage Pump Control for Water Engineering has been fully guaranteed. Our company takes science and technology as the forerunner and fast after-sales service as the focus, and has won the trust of our customers. We constantly improve the level of environmental protection, strengthen the management of social responsibility, and have done a lot of practical things in fulfilling our social responsibility.

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